diff --git a/docs/layouts/doc/search.html b/docs/layouts/doc/search.html
index 736fcaee106f4..4ea883856d134 100644
--- a/docs/layouts/doc/search.html
+++ b/docs/layouts/doc/search.html
@@ -23,7 +23,7 @@
 					<!-- this template is sucked in by search.js and appended to the search-results div above. So editing here will adjust style -->
 					<script id="search-result-template" type="text/x-js-template">
 						<div id="summary-${key}">
-							<h4><a href="${link}">${title}</a></h4>
+							<h4><a href="${link}" rel="nofollow">${title}</a></h4>
 							<p>${snippet}</p>
 							${ isset tags }<p>Tags: ${tags}</p>${ end }
 							${ isset categories }<p>Categories: ${categories}</p>${ end }
diff --git a/modules/markup/common/footnote.go b/modules/markup/common/footnote.go
index bc53d56f2b6b4..399b1d2666604 100644
--- a/modules/markup/common/footnote.go
+++ b/modules/markup/common/footnote.go
@@ -421,7 +421,7 @@ func (r *FootnoteHTMLRenderer) renderFootnoteLink(w util.BufWriter, source []byt
 		_, _ = w.Write(n.Name)
 		_, _ = w.WriteString(`"><a href="#fn:`)
 		_, _ = w.Write(n.Name)
-		_, _ = w.WriteString(`" class="footnote-ref" role="doc-noteref">`)
+		_, _ = w.WriteString(`" rel="nofollow" class="footnote-ref" role="doc-noteref">`)
 		_, _ = w.WriteString(is)
 		_, _ = w.WriteString(`</a></sup>`)
 	}
@@ -434,7 +434,7 @@ func (r *FootnoteHTMLRenderer) renderFootnoteBackLink(w util.BufWriter, source [
 		fmt.Fprintf(os.Stdout, "source:\n%s\n", string(n.Text(source)))
 		_, _ = w.WriteString(` <a href="#fnref:`)
 		_, _ = w.Write(n.Name)
-		_, _ = w.WriteString(`" class="footnote-backref" role="doc-backlink">`)
+		_, _ = w.WriteString(`" rel="nofollow" class="footnote-backref" role="doc-backlink">`)
 		_, _ = w.WriteString("&#x21a9;&#xfe0e;")
 		_, _ = w.WriteString(`</a>`)
 	}
diff --git a/modules/markup/orgmode/orgmode.go b/modules/markup/orgmode/orgmode.go
index b035e04a1fcca..afb7b3dc72a57 100644
--- a/modules/markup/orgmode/orgmode.go
+++ b/modules/markup/orgmode/orgmode.go
@@ -165,7 +165,7 @@ func (r *Writer) WriteRegularLink(l org.RegularLink) {
 		videoSrc := getMediaURL(link)
 		fmt.Fprintf(r, `<video src="%s" title="%s">%s</video>`, videoSrc, description, description)
 	default:
-		fmt.Fprintf(r, `<a href="%s" title="%s">%s</a>`, link, description, description)
+		fmt.Fprintf(r, `<a href="%s" rel="nofollow" title="%s">%s</a>`, link, description, description)
 	}
 }
 
diff --git a/modules/repofiles/action.go b/modules/repofiles/action.go
index d7e3ff452588c..cd39a0ae683e1 100644
--- a/modules/repofiles/action.go
+++ b/modules/repofiles/action.go
@@ -175,7 +175,7 @@ func UpdateIssuesCommit(doer *models.User, repo *models.Repository, commits []*r
 				continue
 			}
 
-			message := fmt.Sprintf(`<a href="%s/commit/%s">%s</a>`, repo.Link(), c.Sha1, html.EscapeString(strings.SplitN(c.Message, "\n", 2)[0]))
+			message := fmt.Sprintf(`<a href="%s/commit/%s" rel="nofollow">%s</a>`, repo.Link(), c.Sha1, html.EscapeString(strings.SplitN(c.Message, "\n", 2)[0]))
 			if err = models.CreateRefComment(doer, refRepo, refIssue, message, c.Sha1); err != nil {
 				return err
 			}
diff --git a/routers/web/feed/convert.go b/routers/web/feed/convert.go
index 8fd8a6c6b787a..2c1506270783e 100644
--- a/routers/web/feed/convert.go
+++ b/routers/web/feed/convert.go
@@ -103,7 +103,7 @@ func feedActionsToFeedItems(ctx *context.Context, actions []*models.Action) (ite
 					if len(desc) != 0 {
 						desc += "\n\n"
 					}
-					desc += fmt.Sprintf("<a href=\"%s\">%s</a>\n%s",
+					desc += fmt.Sprintf("<a href=\"%s\" rel=\"nofollow\">%s</a>\n%s",
 						fmt.Sprintf("%s/commit/%s", act.GetRepoLink(), commit.Sha1),
 						commit.Sha1,
 						templates.RenderCommitMessage(commit.Message, repoLink, nil),
diff --git a/services/webhook/general.go b/services/webhook/general.go
index 777ae086b5e96..82eab525522d5 100644
--- a/services/webhook/general.go
+++ b/services/webhook/general.go
@@ -22,7 +22,7 @@ func noneLinkFormatter(url string, text string) string {
 
 // htmlLinkFormatter creates a HTML link
 func htmlLinkFormatter(url string, text string) string {
-	return fmt.Sprintf(`<a href="%s">%s</a>`, url, html.EscapeString(text))
+	return fmt.Sprintf(`<a href="%s" rel="nofollow">%s</a>`, url, html.EscapeString(text))
 }
 
 func getIssuesPayloadInfo(p *api.IssuePayload, linkFormatter linkFormatter, withSender bool) (string, string, string, int) {
diff --git a/services/webhook/matrix.go b/services/webhook/matrix.go
index 10e0c8fd15543..d71cfe7d1e821 100644
--- a/services/webhook/matrix.go
+++ b/services/webhook/matrix.go
@@ -86,7 +86,7 @@ func (m *MatrixPayloadUnsafe) JSONPayload() ([]byte, error) {
 
 // MatrixLinkFormatter creates a link compatible with Matrix
 func MatrixLinkFormatter(url string, text string) string {
-	return fmt.Sprintf(`<a href="%s">%s</a>`, html.EscapeString(url), html.EscapeString(text))
+	return fmt.Sprintf(`<a href="%s" rel="nofollow">%s</a>`, html.EscapeString(url), html.EscapeString(text))
 }
 
 // MatrixLinkToRef Matrix-formatter link to a repo ref
diff --git a/services/webhook/telegram.go b/services/webhook/telegram.go
index c5a26f687dc4f..739d8dc936a77 100644
--- a/services/webhook/telegram.go
+++ b/services/webhook/telegram.go
@@ -60,7 +60,7 @@ func (t *TelegramPayload) JSONPayload() ([]byte, error) {
 func (t *TelegramPayload) Create(p *api.CreatePayload) (api.Payloader, error) {
 	// created tag/branch
 	refName := git.RefEndName(p.Ref)
-	title := fmt.Sprintf(`[<a href="%s">%s</a>] %s <a href="%s">%s</a> created`, p.Repo.HTMLURL, p.Repo.FullName, p.RefType,
+	title := fmt.Sprintf(`[<a href="%s" rel="nofollow">%s</a>] %s <a href="%s" rel="nofollow">%s</a> created`, p.Repo.HTMLURL, p.Repo.FullName, p.RefType,
 		p.Repo.HTMLURL+"/src/"+refName, refName)
 
 	return createTelegramPayload(title), nil
@@ -70,7 +70,7 @@ func (t *TelegramPayload) Create(p *api.CreatePayload) (api.Payloader, error) {
 func (t *TelegramPayload) Delete(p *api.DeletePayload) (api.Payloader, error) {
 	// created tag/branch
 	refName := git.RefEndName(p.Ref)
-	title := fmt.Sprintf(`[<a href="%s">%s</a>] %s <a href="%s">%s</a> deleted`, p.Repo.HTMLURL, p.Repo.FullName, p.RefType,
+	title := fmt.Sprintf(`[<a href="%s" rel="nofollow">%s</a>] %s <a href="%s" rel="nofollow">%s</a> deleted`, p.Repo.HTMLURL, p.Repo.FullName, p.RefType,
 		p.Repo.HTMLURL+"/src/"+refName, refName)
 
 	return createTelegramPayload(title), nil
@@ -78,7 +78,7 @@ func (t *TelegramPayload) Delete(p *api.DeletePayload) (api.Payloader, error) {
 
 // Fork implements PayloadConvertor Fork method
 func (t *TelegramPayload) Fork(p *api.ForkPayload) (api.Payloader, error) {
-	title := fmt.Sprintf(`%s is forked to <a href="%s">%s</a>`, p.Forkee.FullName, p.Repo.HTMLURL, p.Repo.FullName)
+	title := fmt.Sprintf(`%s is forked to <a href="%s" rel="nofollow">%s</a>`, p.Forkee.FullName, p.Repo.HTMLURL, p.Repo.FullName)
 
 	return createTelegramPayload(title), nil
 }
@@ -101,7 +101,7 @@ func (t *TelegramPayload) Push(p *api.PushPayload) (api.Payloader, error) {
 	if titleLink == "" {
 		titleLink = p.Repo.HTMLURL + "/src/" + branchName
 	}
-	title := fmt.Sprintf(`[<a href="%s">%s</a>:<a href="%s">%s</a>] %s`, p.Repo.HTMLURL, p.Repo.FullName, titleLink, branchName, commitDesc)
+	title := fmt.Sprintf(`[<a href="%s" rel="nofollow">%s</a>:<a href="%s" rel="nofollow">%s</a>] %s`, p.Repo.HTMLURL, p.Repo.FullName, titleLink, branchName, commitDesc)
 
 	var text string
 	// for each commit, generate attachment text
@@ -110,7 +110,7 @@ func (t *TelegramPayload) Push(p *api.PushPayload) (api.Payloader, error) {
 		if commit.Author != nil {
 			authorName = " - " + commit.Author.Name
 		}
-		text += fmt.Sprintf(`[<a href="%s">%s</a>] %s`, commit.URL, commit.ID[:7],
+		text += fmt.Sprintf(`[<a href="%s" rel="nofollow">%s</a>] %s`, commit.URL, commit.ID[:7],
 			strings.TrimRight(commit.Message, "\r\n")) + authorName
 		// add linebreak to each commit but the last
 		if i < len(p.Commits)-1 {
@@ -164,7 +164,7 @@ func (t *TelegramPayload) Repository(p *api.RepositoryPayload) (api.Payloader, e
 	var title string
 	switch p.Action {
 	case api.HookRepoCreated:
-		title = fmt.Sprintf(`[<a href="%s">%s</a>] Repository created`, p.Repository.HTMLURL, p.Repository.FullName)
+		title = fmt.Sprintf(`[<a href="%s" rel="nofollow">%s</a>] Repository created`, p.Repository.HTMLURL, p.Repository.FullName)
 		return createTelegramPayload(title), nil
 	case api.HookRepoDeleted:
 		title = fmt.Sprintf("[%s] Repository deleted", p.Repository.FullName)
diff --git a/templates/admin/auth/list.tmpl b/templates/admin/auth/list.tmpl
index 35ab976022bb2..6b10c2bb2bba8 100644
--- a/templates/admin/auth/list.tmpl
+++ b/templates/admin/auth/list.tmpl
@@ -26,12 +26,12 @@
 					{{range .Sources}}
 						<tr>
 							<td>{{.ID}}</td>
-							<td><a href="{{AppSubUrl}}/admin/auths/{{.ID}}">{{.Name}}</a></td>
+							<td><a href="{{AppSubUrl}}/admin/auths/{{.ID}}" rel="nofollow">{{.Name}}</a></td>
 							<td>{{.TypeName}}</td>
 							<td>{{if .IsActive}}{{svg "octicon-check"}}{{else}}{{svg "octicon-x"}}{{end}}</td>
 							<td><span class="poping up" data-content="{{.UpdatedUnix.FormatShort}}" data-variation="tiny">{{.UpdatedUnix.FormatShort}}</span></td>
 							<td><span class="poping up" data-content="{{.CreatedUnix.FormatLong}}" data-variation="tiny">{{.CreatedUnix.FormatShort}}</span></td>
-							<td><a href="{{AppSubUrl}}/admin/auths/{{.ID}}">{{svg "octicon-pencil"}}</a></td>
+							<td><a href="{{AppSubUrl}}/admin/auths/{{.ID}}" rel="nofollow">{{svg "octicon-pencil"}}</a></td>
 						</tr>
 					{{end}}
 				</tbody>
diff --git a/templates/admin/dashboard.tmpl b/templates/admin/dashboard.tmpl
index 79f031882e332..2923f69869fc9 100644
--- a/templates/admin/dashboard.tmpl
+++ b/templates/admin/dashboard.tmpl
@@ -5,7 +5,7 @@
 		{{template "base/alert" .}}
 		{{if .NeedUpdate}}
 			<div class="ui negative message flash-error">
-				<p>"Gitea {{.RemoteVersion | Str2html}} is now available, you are running {{.AppVer | Str2html}}. Check the <a href="https://blog.gitea.io">blog</a> for more details.</p>
+				<p>"Gitea {{.RemoteVersion | Str2html}} is now available, you are running {{.AppVer | Str2html}}. Check the <a href="https://blog.gitea.io" rel="nofollow">blog</a> for more details.</p>
 			</div>
 		{{end}}
 		<h4 class="ui top attached header">
diff --git a/templates/admin/emails/list.tmpl b/templates/admin/emails/list.tmpl
index 2d489a495d184..6e6c046913e28 100644
--- a/templates/admin/emails/list.tmpl
+++ b/templates/admin/emails/list.tmpl
@@ -49,7 +49,7 @@
 				<tbody>
 					{{range .Emails}}
 						<tr>
-							<td><a href="{{AppSubUrl}}/{{.Name}}">{{.Name}}</a></td>
+							<td><a href="{{AppSubUrl}}/{{.Name}}" rel="nofollow">{{.Name}}</a></td>
 							<td><span class="text truncate">{{.FullName}}</span></td>
 							<td><span class="text email">{{.Email}}</span></td>
 							<td>{{if .IsPrimary}}{{svg "octicon-check"}}{{else}}{{svg "octicon-x"}}{{end}}</td>
diff --git a/templates/admin/monitor.tmpl b/templates/admin/monitor.tmpl
index 16c4d88002a20..34fdae86bfbf2 100644
--- a/templates/admin/monitor.tmpl
+++ b/templates/admin/monitor.tmpl
@@ -58,7 +58,7 @@
 							<td>{{.Type}}</td>
 							<td>{{.ExemplarType}}</td>
 							<td>{{$sum := .NumberOfWorkers}}{{if lt $sum 0}}-{{else}}{{$sum}}{{end}}</td>
-							<td><a href="{{$.Link}}/queue/{{.QID}}" class="button">{{if lt $sum 0}}{{$.i18n.Tr "admin.monitor.queue.review"}}{{else}}{{$.i18n.Tr "admin.monitor.queue.review_add"}}{{end}}</a>
+							<td><a href="{{$.Link}}/queue/{{.QID}}" rel="nofollow" class="button">{{if lt $sum 0}}{{$.i18n.Tr "admin.monitor.queue.review"}}{{else}}{{$.i18n.Tr "admin.monitor.queue.review_add"}}{{end}}</a>
 						</tr>
 					{{end}}
 				</tbody>
diff --git a/templates/admin/notice.tmpl b/templates/admin/notice.tmpl
index f9cda68df491c..cfbf0c79aece4 100644
--- a/templates/admin/notice.tmpl
+++ b/templates/admin/notice.tmpl
@@ -30,7 +30,7 @@
 							<td>{{$.i18n.Tr .TrStr}}</td>
 							<td class="view-detail"><span class="notice-description text truncate">{{.Description}}</span></td>
 							<td><span class="notice-created-time poping up" data-content="{{.CreatedUnix.AsTime}}" data-variation="inverted tiny">{{.CreatedUnix.FormatShort}}</span></td>
-							<td><a href="#">{{svg "octicon-note" 16 "view-detail"}}</a></td>
+							<td><a href="#" rel="nofollow">{{svg "octicon-note" 16 "view-detail"}}</a></td>
 						</tr>
 					{{end}}
 				</tbody>
diff --git a/templates/admin/org/list.tmpl b/templates/admin/org/list.tmpl
index 75c4d39196cf1..f1af439fa9b59 100644
--- a/templates/admin/org/list.tmpl
+++ b/templates/admin/org/list.tmpl
@@ -36,7 +36,7 @@
 						<tr>
 							<td>{{.ID}}</td>
 							<td>
-								<a href="{{.HomeLink}}">{{.Name}}</a>
+								<a href="{{.HomeLink}}" rel="nofollow">{{.Name}}</a>
 								{{if .Visibility.IsPrivate}}
 									<span class="text gold">{{svg "octicon-lock"}}</span>
 								{{end}}
@@ -45,7 +45,7 @@
 							<td>{{.NumMembers}}</td>
 							<td>{{.NumRepos}}</td>
 							<td><span title="{{.CreatedUnix.FormatLong}}">{{.CreatedUnix.FormatShort}}</span></td>
-							<td><a href="{{.OrganisationLink}}/settings">{{svg "octicon-pencil"}}</a></td>
+							<td><a href="{{.OrganisationLink}}/settings" rel="nofollow">{{svg "octicon-pencil"}}</a></td>
 						</tr>
 					{{end}}
 				</tbody>
diff --git a/templates/admin/repo/list.tmpl b/templates/admin/repo/list.tmpl
index e96d9ebb33dc2..aaee738079bfc 100644
--- a/templates/admin/repo/list.tmpl
+++ b/templates/admin/repo/list.tmpl
@@ -45,13 +45,13 @@
 						<tr>
 							<td>{{.ID}}</td>
 							<td>
-								<a href="{{AppSubUrl}}/{{.Owner.Name}}">{{.Owner.Name}}</a>
+								<a href="{{AppSubUrl}}/{{.Owner.Name}}" rel="nofollow">{{.Owner.Name}}</a>
 								{{if .Owner.Visibility.IsPrivate}}
 									<span class="text gold">{{svg "octicon-lock"}}</span>
 								{{end}}
 							</td>
 							<td>
-								<a href="{{AppSubUrl}}/{{.Owner.Name}}/{{.Name}}">{{.Name}}</a>
+								<a href="{{AppSubUrl}}/{{.Owner.Name}}/{{.Name}}" rel="nofollow">{{.Name}}</a>
 								{{if .IsArchived}}
 									<span class="ui basic mini label">{{$.i18n.Tr "repo.desc.archived"}}</span>
 								{{end}}
diff --git a/templates/admin/user/list.tmpl b/templates/admin/user/list.tmpl
index ceab7a9b1b0ae..0fc0a7973f062 100644
--- a/templates/admin/user/list.tmpl
+++ b/templates/admin/user/list.tmpl
@@ -87,7 +87,7 @@
 					{{range .Users}}
 						<tr>
 							<td>{{.ID}}</td>
-							<td><a href="{{AppSubUrl}}/{{.Name}}">{{.Name}}</a></td>
+							<td><a href="{{AppSubUrl}}/{{.Name}}" rel="nofollow">{{.Name}}</a></td>
 							<td><span class="text truncate email">{{.Email}}</span></td>
 							<td>{{if .IsActive}}{{svg "octicon-check"}}{{else}}{{svg "octicon-x"}}{{end}}</td>
 							<td>{{if .IsAdmin}}{{svg "octicon-check"}}{{else}}{{svg "octicon-x"}}{{end}}</td>
@@ -100,7 +100,7 @@
 							{{else}}
 								<td><span>{{$.i18n.Tr "admin.users.never_login"}}</span></td>
 							{{end}}
-							<td><a href="{{$.Link}}/{{.ID}}">{{svg "octicon-pencil"}}</a></td>
+							<td><a href="{{$.Link}}/{{.ID}}" rel="nofollow">{{svg "octicon-pencil"}}</a></td>
 						</tr>
 					{{end}}
 				</tbody>
diff --git a/templates/base/footer_content.tmpl b/templates/base/footer_content.tmpl
index e30fe70768632..3d21e9027aa94 100644
--- a/templates/base/footer_content.tmpl
+++ b/templates/base/footer_content.tmpl
@@ -16,8 +16,8 @@
 					{{end}}
 				</div>
 			</div>
-			<a href="{{AssetUrlPrefix}}/js/licenses.txt">{{.i18n.Tr "licenses"}}</a>
-			{{if .EnableSwagger}}<a href="{{AppSubUrl}}/api/swagger">API</a>{{end}}
+			<a href="{{AssetUrlPrefix}}/js/licenses.txt" rel="nofollow">{{.i18n.Tr "licenses"}}</a>
+			{{if .EnableSwagger}}<a href="{{AppSubUrl}}/api/swagger" rel="nofollow">API</a>{{end}}
 			<a target="_blank" rel="noopener noreferrer" href="https://gitea.io">{{.i18n.Tr "website"}}</a>
 			{{template "custom/extra_links_footer" .}}
 			{{if (or .ShowFooterVersion .PageIsAdmin)}}<span class="version">{{GoVer}}</span>{{end}}
diff --git a/templates/base/head_navbar.tmpl b/templates/base/head_navbar.tmpl
index c370b70f29878..f1ddfd94221f6 100644
--- a/templates/base/head_navbar.tmpl
+++ b/templates/base/head_navbar.tmpl
@@ -1,6 +1,6 @@
 <div class="ui container" id="navbar">
 	<div class="item brand" style="justify-content: space-between;">
-		<a href="{{AppSubUrl}}/" data-content="{{if .IsSigned}}{{.i18n.Tr "dashboard"}}{{else}}{{.i18n.Tr "home"}}{{end}}" data-variation="tiny inverted">
+		<a href="{{AppSubUrl}}/" data-content="{{if .IsSigned}}{{.i18n.Tr "dashboard"}}{{else}}{{.i18n.Tr "home"}}{{end}}" data-variation="tiny inverted" rel="nofollow">
 			<img class="ui mini image" width="30" height="30" src="{{AssetUrlPrefix}}/img/logo.svg">
 		</a>
 		<div class="ui basic icon button mobile-only" id="navbar-expand-toggle">
@@ -101,7 +101,7 @@
 				</div>
 			</div>
 
-			<a href="{{AppSubUrl}}/notifications" class="item poping up" data-content='{{.i18n.Tr "notifications"}}' data-variation="tiny inverted">
+			<a href="{{AppSubUrl}}/notifications" class="item poping up" data-content='{{.i18n.Tr "notifications"}}' data-variation="tiny inverted" rel="nofollow">
 				<span class="text">
 					<span class="fitted">{{svg "octicon-bell"}}</span>
 					<span class="sr-mobile-only">{{.i18n.Tr "notifications"}}</span>
diff --git a/templates/explore/code.tmpl b/templates/explore/code.tmpl
index 8cc1b71a7ad0a..bccc45496ca32 100644
--- a/templates/explore/code.tmpl
+++ b/templates/explore/code.tmpl
@@ -47,7 +47,7 @@
 											<tr>
 												<td class="lines-num">
 													{{range .LineNumbers}}
-														<a href="{{EscapePound $repo.HTMLURL}}/src/commit/{{$result.CommitID}}/{{EscapePound $result.Filename}}#L{{.}}"><span>{{.}}</span></a>
+														<a href="{{EscapePound $repo.HTMLURL}}/src/commit/{{$result.CommitID}}/{{EscapePound $result.Filename}}#L{{.}}" rel="nofollow"><span>{{.}}</span></a>
 													{{end}}
 												</td>
 												<td class="lines-code chroma"><code class="code-inner">{{.FormattedLines | Safe}}</code></td>
diff --git a/templates/explore/organizations.tmpl b/templates/explore/organizations.tmpl
index b2fee6c19ada4..58ab23e8c0438 100644
--- a/templates/explore/organizations.tmpl
+++ b/templates/explore/organizations.tmpl
@@ -21,7 +21,7 @@
 							{{end}}
 							{{if and .Website}}
 								{{svg "octicon-link"}}
-								<a href="{{.Website}}" rel="nofollow">{{.Website}}</a>
+								<a href="{{.Website}}">{{.Website}}</a>
 							{{end}}
 							{{svg "octicon-clock"}} {{$.i18n.Tr "user.join_on"}} {{.CreatedUnix.FormatShort}}
 						</div>
diff --git a/templates/explore/repo_list.tmpl b/templates/explore/repo_list.tmpl
index 4ff48b60761d8..8b97fcec7bc1d 100644
--- a/templates/explore/repo_list.tmpl
+++ b/templates/explore/repo_list.tmpl
@@ -53,7 +53,7 @@
 				{{if .Topics }}
 					<div class="ui tags">
 					{{range .Topics}}
-						{{if ne . "" }}<a href="{{AppSubUrl}}/explore/repos?q={{.}}&topic=1"><div class="ui small label topic">{{.}}</div></a>{{end}}
+						{{if ne . "" }}<a href="{{AppSubUrl}}/explore/repos?q={{.}}&topic=1"><div class="ui small label topic" rel="nofollow">{{.}}</div></a>{{end}}
 					{{end}}
 					</div>
 				{{end}}
diff --git a/templates/mail/auth/reset_passwd.tmpl b/templates/mail/auth/reset_passwd.tmpl
index 7cab33bf4e312..392d19962ac6b 100644
--- a/templates/mail/auth/reset_passwd.tmpl
+++ b/templates/mail/auth/reset_passwd.tmpl
@@ -8,7 +8,7 @@
 {{ $recover_url := printf "%suser/recover_account?code=%s" AppUrl .Code}}
 <body>
 	<p>{{.i18n.Tr "mail.hi_user_x" .DisplayName | Str2html}}</p><br>
-	<p>{{.i18n.Tr "mail.reset_password.text" .ResetPwdCodeLives | Str2html}}</p><p><a href="{{$recover_url}}">{{$recover_url}}</a></p><br>
+	<p>{{.i18n.Tr "mail.reset_password.text" .ResetPwdCodeLives | Str2html}}</p><p><a href="{{$recover_url}}" rel="nofollow">{{$recover_url}}</a></p><br>
 	<p>{{.i18n.Tr "mail.link_not_working_do_paste"}}</p>
 
 	<p>© <a target="_blank" rel="noopener noreferrer" href="{{AppUrl}}">{{AppName}}</a></p>
diff --git a/templates/mail/notify/collaborator.tmpl b/templates/mail/notify/collaborator.tmpl
index baa46bafda9d1..26a95c7fed3e6 100644
--- a/templates/mail/notify/collaborator.tmpl
+++ b/templates/mail/notify/collaborator.tmpl
@@ -14,7 +14,7 @@
 		<p>
 			---
 			<br>
-			<a href="{{.Link}}">{{.i18n.Tr "mail.view_it_on" AppName}}</a>.
+			<a href="{{.Link}}" rel="nofollow">{{.i18n.Tr "mail.view_it_on" AppName}}</a>.
 		</p>
 	</div>
 </body>
diff --git a/templates/mail/release.tmpl b/templates/mail/release.tmpl
index fabe4999e30f8..f6f8750fd296a 100644
--- a/templates/mail/release.tmpl
+++ b/templates/mail/release.tmpl
@@ -11,7 +11,7 @@
 
 </head>
 
-{{$release_url := printf "<a href='%s'>%s</a>" .Release.HTMLURL .Release.TagName}}
+{{$release_url := printf "<a href='%s' rel="nofollow">%s</a>" .Release.HTMLURL .Release.TagName}}
 {{$repo_url := printf "<a href='%s'>%s</a>" .Release.Repo.HTMLURL .Release.Repo.FullName}}
 <body>
 	<p>
diff --git a/templates/org/team/members.tmpl b/templates/org/team/members.tmpl
index f2c89e065364a..df4e600ddde94 100644
--- a/templates/org/team/members.tmpl
+++ b/templates/org/team/members.tmpl
@@ -34,7 +34,7 @@
 										data-data-team-name="{{$.Team.Name}}">{{$.i18n.Tr "org.members.remove"}}</button>
 								</form>
 							{{end}}
-							<a href="{{.HomeLink}}">
+							<a href="{{.HomeLink}}" rel="nofollow">
 								{{avatar .}}
 								{{.DisplayName}}
 							</a>
diff --git a/templates/post-install.tmpl b/templates/post-install.tmpl
index 4abfe171dddd9..f5660c5f29b79 100644
--- a/templates/post-install.tmpl
+++ b/templates/post-install.tmpl
@@ -13,7 +13,7 @@
 					</div>
 					<div class="ui stackable middle very relaxed page grid">
 						<div class="sixteen wide center aligned centered column">
-							<p><a href="{{AppUrl}}user/login">{{AppUrl}}user/login</a></p>
+							<p><a href="{{AppUrl}}user/login" rel="nofollow">{{AppUrl}}user/login</a></p>
 						</div>
 					</div>
 				</div>
diff --git a/templates/repo/activity.tmpl b/templates/repo/activity.tmpl
index d4cff880e5829..002a9a813690b 100644
--- a/templates/repo/activity.tmpl
+++ b/templates/repo/activity.tmpl
@@ -33,8 +33,8 @@
 				<div class="column">
 					{{if gt .Activity.ActivePRCount 0}}
 					<div class="stats-table">
-						<a href="#merged-pull-requests" class="table-cell tiny background purple" style="width: {{.Activity.MergedPRPerc}}{{if ne .Activity.MergedPRPerc 0}}%{{end}}"></a>
-						<a href="#proposed-pull-requests" class="table-cell tiny background green"></a>
+						<a href="#merged-pull-requests" class="table-cell tiny background purple" style="width: {{.Activity.MergedPRPerc}}{{if ne .Activity.MergedPRPerc 0}}%{{end}}" rel="nofollow"></a>
+						<a href="#proposed-pull-requests" class="table-cell tiny background green" rel="nofollow"></a>
 					</div>
 					{{else}}
 					<div class="stats-table">
@@ -48,8 +48,8 @@
 				<div class="column">
 					{{if gt .Activity.ActiveIssueCount 0}}
 					<div class="stats-table">
-						<a href="#closed-issues" class="table-cell tiny background red" style="width: {{.Activity.ClosedIssuePerc}}{{if ne .Activity.ClosedIssuePerc 0}}%{{end}}"></a>
-						<a href="#new-issues" class="table-cell tiny background green"></a>
+						<a href="#closed-issues" class="table-cell tiny background red" style="width: {{.Activity.ClosedIssuePerc}}{{if ne .Activity.ClosedIssuePerc 0}}%{{end}}" rel="nofollow"></a>
+						<a href="#new-issues" class="table-cell tiny background green" rel="nofollow"></a>
 					</div>
 					{{else}}
 					<div class="stats-table">
@@ -62,21 +62,21 @@
 		</div>
 		<div class="ui attached segment horizontal segments">
 			{{if .Permission.CanRead $.UnitTypePullRequests}}
-				<a href="#merged-pull-requests" class="ui attached segment text center">
+				<a href="#merged-pull-requests" class="ui attached segment text center" rel="nofollow">
 					<span class="text purple">{{svg "octicon-git-pull-request"}}</span> <strong>{{.Activity.MergedPRCount}}</strong><br>
 					{{.i18n.Tr (TrN .i18n.Lang .Activity.MergedPRCount "repo.activity.merged_prs_count_1" "repo.activity.merged_prs_count_n") }}
 				</a>
-				<a href="#proposed-pull-requests" class="ui attached segment text center">
+				<a href="#proposed-pull-requests" class="ui attached segment text center" rel="nofollow">
 					<span class="text green">{{svg "octicon-git-branch"}}</span> <strong>{{.Activity.OpenedPRCount}}</strong><br>
 					{{.i18n.Tr (TrN .i18n.Lang .Activity.OpenedPRCount "repo.activity.opened_prs_count_1" "repo.activity.opened_prs_count_n") }}
 				</a>
 			{{end}}
 			{{if .Permission.CanRead $.UnitTypeIssues}}
-				<a href="#closed-issues" class="ui attached segment text center">
+				<a href="#closed-issues" class="ui attached segment text center" rel="nofollow">
 					<span class="text red">{{svg "octicon-issue-closed"}}</span> <strong>{{.Activity.ClosedIssueCount}}</strong><br>
 					{{.i18n.Tr (TrN .i18n.Lang .Activity.ClosedIssueCount "repo.activity.closed_issues_count_1" "repo.activity.closed_issues_count_n") }}
 				</a>
-				<a href="#new-issues" class="ui attached segment text center">
+				<a href="#new-issues" class="ui attached segment text center" rel="nofollow">
 					<span class="text green">{{svg "octicon-issue-opened"}}</span> <strong>{{.Activity.OpenedIssueCount}}</strong><br>
 					{{.i18n.Tr (TrN .i18n.Lang .Activity.OpenedIssueCount "repo.activity.new_issues_count_1" "repo.activity.new_issues_count_n") }}
 				</a>
diff --git a/templates/repo/blame.tmpl b/templates/repo/blame.tmpl
index c7c497088a9e2..e0afae6a11e24 100644
--- a/templates/repo/blame.tmpl
+++ b/templates/repo/blame.tmpl
@@ -32,7 +32,7 @@
 											{{$row.Avatar}}
 										</div>
 										<div class="blame-message">
-											<a href="{{$row.CommitURL}}" title="{{$row.CommitMessage}}">
+											<a href="{{$row.CommitURL}}" title="{{$row.CommitMessage}}" rel="nofollow">
 												{{$row.CommitMessage}}
 											</a>
 										</div>
@@ -44,7 +44,7 @@
 							</td>
 							<td class="lines-blame-btn">
 								{{if $row.PreviousSha}}
-									<a href="{{$row.PreviousShaURL}}" class="poping up" data-content='{{$.i18n.Tr "repo.blame_prior"}}' data-variation="tiny inverted">
+									<a href="{{$row.PreviousShaURL}}" class="poping up" data-content='{{$.i18n.Tr "repo.blame_prior"}}' data-variation="tiny inverted" rel="nofollow">
 										{{svg "octicon-versions"}}
 									</a>
 								{{end}}
diff --git a/templates/repo/branch/list.tmpl b/templates/repo/branch/list.tmpl
index cadf91df041c5..b906c9f5b71ba 100644
--- a/templates/repo/branch/list.tmpl
+++ b/templates/repo/branch/list.tmpl
@@ -18,8 +18,8 @@
 								{{if .IsProtected}}
 									{{svg "octicon-shield-lock"}}
 								{{end}}
-								<a href="{{$.RepoLink}}/src/branch/{{$.DefaultBranch | EscapePound}}">{{$.DefaultBranch}}</a>
-								<p class="info df ac my-2">{{svg "octicon-git-commit" 16 "mr-2"}}<a href="{{$.RepoLink}}/commit/{{.Commit.ID.String}}">{{ShortSha .Commit.ID.String}}</a> · <span class="commit-message">{{RenderCommitMessage .Commit.CommitMessage $.RepoLink $.Repository.ComposeMetas}}</span> · {{$.i18n.Tr "org.repo_updated"}} {{TimeSince .Commit.Committer.When $.i18n.Lang}}</p>
+								<a href="{{$.RepoLink}}/src/branch/{{$.DefaultBranch | EscapePound}}" rel="nofollow">{{$.DefaultBranch}}</a>
+								<p class="info df ac my-2">{{svg "octicon-git-commit" 16 "mr-2"}}<a href="{{$.RepoLink}}/commit/{{.Commit.ID.String}}" rel="nofollow">{{ShortSha .Commit.ID.String}}</a> · <span class="commit-message">{{RenderCommitMessage .Commit.CommitMessage $.RepoLink $.Repository.ComposeMetas}}</span> · {{$.i18n.Tr "org.repo_updated"}} {{TimeSince .Commit.Committer.When $.i18n.Lang}}</p>
 							{{end}}
 						{{end}}
 						</td>
@@ -54,14 +54,14 @@
 								<tr>
 									<td class="six wide">
 									{{if .IsDeleted}}
-										<s><a href="{{$.RepoLink}}/src/branch/{{.Name | EscapePound}}">{{.Name}}</a></s>
+										<s><a href="{{$.RepoLink}}/src/branch/{{.Name | EscapePound}}" rel="nofollow">{{.Name}}</a></s>
 										<p class="info">{{$.i18n.Tr "repo.branch.deleted_by" .DeletedBranch.DeletedBy.Name}} {{TimeSinceUnix .DeletedBranch.DeletedUnix $.i18n.Lang}}</p>
 									{{else}}
 										{{if .IsProtected}}
 											{{svg "octicon-shield-lock"}}
 										{{end}}
-										<a href="{{$.RepoLink}}/src/branch/{{.Name | EscapePound}}">{{.Name}}</a>
-										<p class="info df ac my-2">{{svg "octicon-git-commit" 16 "mr-2"}}<a href="{{$.RepoLink}}/commit/{{.Commit.ID.String}}">{{ShortSha .Commit.ID.String}}</a> · <span class="commit-message">{{RenderCommitMessage .Commit.CommitMessage $.RepoLink $.Repository.ComposeMetas}}</span> · {{$.i18n.Tr "org.repo_updated"}} {{TimeSince .Commit.Committer.When $.i18n.Lang}}</p>
+										<a href="{{$.RepoLink}}/src/branch/{{.Name | EscapePound}}" rel="nofollow">{{.Name}}</a>
+										<p class="info df ac my-2">{{svg "octicon-git-commit" 16 "mr-2"}}<a href="{{$.RepoLink}}/commit/{{.Commit.ID.String}}" rel="nofollow">{{ShortSha .Commit.ID.String}}</a> · <span class="commit-message">{{RenderCommitMessage .Commit.CommitMessage $.RepoLink $.Repository.ComposeMetas}}</span> · {{$.i18n.Tr "org.repo_updated"}} {{TimeSince .Commit.Committer.When $.i18n.Lang}}</p>
 									{{end}}
 									</td>
 									<td class="three wide ui">
@@ -85,24 +85,24 @@
 													{{svg "octicon-git-pull-request"}} {{$.i18n.Tr "repo.branch.included"}}
 												</a>
 											{{else if and (not .IsDeleted) $.AllowsPulls (gt .CommitsAhead 0)}}
-											<a href="{{$.RepoLink}}/compare/{{$.DefaultBranch | EscapePound}}...{{if ne $.Repository.Owner.Name $.Owner.Name}}{{$.Owner.Name}}:{{end}}{{.Name | EscapePound}}">
+											<a href="{{$.RepoLink}}/compare/{{$.DefaultBranch | EscapePound}}...{{if ne $.Repository.Owner.Name $.Owner.Name}}{{$.Owner.Name}}:{{end}}{{.Name | EscapePound}}" rel="nofollow">
 												<button id="new-pull-request" class="ui compact basic button mr-0">{{if $.CanPull}}{{$.i18n.Tr "repo.pulls.compare_changes"}}{{else}}{{$.i18n.Tr "action.compare_branch"}}{{end}}</button>
 											</a>
 											{{end}}
 										{{else if and .LatestPullRequest.HasMerged .MergeMovedOn}}
 											{{if and (not .IsDeleted) $.AllowsPulls (gt .CommitsAhead 0)}}
-											<a href="{{$.RepoLink}}/compare/{{$.DefaultBranch | EscapePound}}...{{if ne $.Repository.Owner.Name $.Owner.Name}}{{$.Owner.Name}}:{{end}}{{.Name | EscapePound}}">
+											<a href="{{$.RepoLink}}/compare/{{$.DefaultBranch | EscapePound}}...{{if ne $.Repository.Owner.Name $.Owner.Name}}{{$.Owner.Name}}:{{end}}{{.Name | EscapePound}}" rel="nofollow">
 												<button id="new-pull-request" class="ui compact basic button mr-0">{{if $.CanPull}}{{$.i18n.Tr "repo.pulls.compare_changes"}}{{else}}{{$.i18n.Tr "action.compare_branch"}}{{end}}</button>
 											</a>
 											{{end}}
 										{{else}}
-											<a href="{{.LatestPullRequest.Issue.HTMLURL}}" class="vm ref-issue">{{if not .LatestPullRequest.IsSameRepo}}{{.LatestPullRequest.BaseRepo.FullName}}{{end}}#{{.LatestPullRequest.Issue.Index}}</a>
+											<a href="{{.LatestPullRequest.Issue.HTMLURL}}" class="vm ref-issue" rel="nofollow">{{if not .LatestPullRequest.IsSameRepo}}{{.LatestPullRequest.BaseRepo.FullName}}{{end}}#{{.LatestPullRequest.Issue.Index}}</a>
 											{{if .LatestPullRequest.HasMerged}}
-												<a href="{{.LatestPullRequest.Issue.HTMLURL}}" class="ui text-label purple large label vm">{{svg "octicon-git-merge" 16 "mr-2"}}{{$.i18n.Tr "repo.pulls.merged"}}</a>
+												<a href="{{.LatestPullRequest.Issue.HTMLURL}}" rel="nofollow" class="ui text-label purple large label vm">{{svg "octicon-git-merge" 16 "mr-2"}}{{$.i18n.Tr "repo.pulls.merged"}}</a>
 											{{else if .LatestPullRequest.Issue.IsClosed}}
-												<a href="{{.LatestPullRequest.Issue.HTMLURL}}" class="ui text-label red large label vm">{{svg "octicon-git-pull-request" 16 "mr-2"}}{{$.i18n.Tr "repo.issues.closed_title"}}</a>
+												<a href="{{.LatestPullRequest.Issue.HTMLURL}}" rel="nofollow" class="ui text-label red large label vm">{{svg "octicon-git-pull-request" 16 "mr-2"}}{{$.i18n.Tr "repo.issues.closed_title"}}</a>
 											{{else}}
-												<a href="{{.LatestPullRequest.Issue.HTMLURL}}" class="ui text-label green large label vm">{{svg "octicon-git-pull-request" 16 "mr-2"}}{{$.i18n.Tr "repo.issues.open_title"}}</a>
+												<a href="{{.LatestPullRequest.Issue.HTMLURL}}" rel="nofollow" class="ui text-label green large label vm">{{svg "octicon-git-pull-request" 16 "mr-2"}}{{$.i18n.Tr "repo.issues.open_title"}}</a>
 											{{end}}
 										{{end}}
 									</td>
diff --git a/templates/repo/branch_dropdown.tmpl b/templates/repo/branch_dropdown.tmpl
index 1605fa91a75e0..06e8dc533c476 100644
--- a/templates/repo/branch_dropdown.tmpl
+++ b/templates/repo/branch_dropdown.tmpl
@@ -54,7 +54,7 @@
 			<div class="scrolling menu" ref="scrollContainer">
 				<div v-for="(item, index) in filteredItems" :key="item.name" class="item" :class="{selected: item.selected, active: active == index}" @click="selectItem(item)" :ref="'listItem' + index">${ item.name }</div>
 				<div class="item" v-if="showCreateNewBranch" :class="{active: active == filteredItems.length}" :ref="'listItem' + filteredItems.length">
-					<a href="#" @click="createNewBranch()">
+					<a href="#" @click="createNewBranch()" rel="nofollow">
 						<div v-show="createTag">
 							<i class="reference tags icon"></i>
 							{{.root.i18n.Tr "repo.tag.create_tag" `${ searchTerm }` | Safe}}
diff --git a/templates/repo/commit_page.tmpl b/templates/repo/commit_page.tmpl
index 01cbd5182dc66..357c956889eaa 100644
--- a/templates/repo/commit_page.tmpl
+++ b/templates/repo/commit_page.tmpl
@@ -40,9 +40,9 @@
 					{{if .Author}}
 						{{avatar .Author}}
 						{{if .Author.FullName}}
-							<a href="{{.Author.HomeLink}}"><strong>{{.Author.FullName}}</strong></a>
+							<a href="{{.Author.HomeLink}}" rel="nofollow"><strong>{{.Author.FullName}}</strong></a>
 						{{else}}
-							<a href="{{.Author.HomeLink}}"><strong>{{.Commit.Author.Name}}</strong></a>
+							<a href="{{.Author.HomeLink}}" rel="nofollow"><strong>{{.Commit.Author.Name}}</strong></a>
 						{{end}}
 					{{else}}
 						{{avatarByEmail .Commit.Author.Email .Commit.Author.Email 12}}
@@ -54,7 +54,7 @@
 							<span class="text grey">{{svg "octicon-git-commit"}}{{.i18n.Tr "repo.diff.committed_by"}}</span>
 							{{if ne .Verification.CommittingUser.ID 0}}
 								{{avatar .Verification.CommittingUser}}
-								<a href="{{.Verification.CommittingUser.HomeLink}}"><strong>{{.Commit.Committer.Name}}</strong></a>
+								<a href="{{.Verification.CommittingUser.HomeLink}}" rel="nofollow"><strong>{{.Commit.Committer.Name}}</strong></a>
 							{{else}}
 								{{avatarByEmail .Commit.Committer.Email .Commit.Committer.Name}}
 								<strong>{{.Commit.Committer.Name}}</strong>
@@ -99,7 +99,7 @@
 							<span class="ui text">{{.i18n.Tr "repo.commits.signed_by_untrusted_user_unmatched"}}:</span>
 						{{end}}
 						{{avatar .Verification.SigningUser}}
-						<a href="{{.Verification.SigningUser.HomeLink}}"><strong>{{.Verification.SigningUser.Name}}</strong></a>
+						<a href="{{.Verification.SigningUser.HomeLink}}" rel="nofollow"><strong>{{.Verification.SigningUser.Name}}</strong></a>
 						<span class="pull-right"><span class="ui text">{{.i18n.Tr "repo.commits.gpg_key_id"}}:</span> {{.Verification.SigningKey.KeyID}}</span>
 					{{else}}
 						<span title="{{.i18n.Tr "gpg.default_key"}}">{{svg "gitea-lock-cog"}}</span>
@@ -128,7 +128,7 @@
 				<i class="sticky note icon"></i>
 				{{.i18n.Tr "repo.diff.git-notes"}}:
 				{{if .NoteAuthor}}
-					<a href="{{.NoteAuthor.HomeLink}}">
+					<a href="{{.NoteAuthor.HomeLink}}" rel="nofollow">
 						{{if .NoteAuthor.FullName}}
 							<strong>{{.NoteAuthor.FullName}}</strong>
 						{{else}}
diff --git a/templates/repo/commits.tmpl b/templates/repo/commits.tmpl
index 1e2b0f7d90c1d..3a041520ad4d4 100644
--- a/templates/repo/commits.tmpl
+++ b/templates/repo/commits.tmpl
@@ -6,7 +6,7 @@
 		<div class="ui secondary stackable menu mobile--margin-between-items">
 		{{template "repo/branch_dropdown" dict "root" .}}
 			<div class="fitted item">
-				<a href="{{.RepoLink}}/graph" class="ui basic small compact button">
+				<a href="{{.RepoLink}}/graph" rel="nofollow" class="ui basic small compact button">
 					<span class="text">
 						{{svg "octicon-git-branch"}}
 					</span>
diff --git a/templates/repo/commits_table.tmpl b/templates/repo/commits_table.tmpl
index 7bdcb340d9fe8..9181eb17942d2 100644
--- a/templates/repo/commits_table.tmpl
+++ b/templates/repo/commits_table.tmpl
@@ -23,9 +23,9 @@
 				<button class="ui primary tiny button mr-0 poping up" data-panel="#add-deploy-key-panel" data-content={{.i18n.Tr "repo.commits.search.tooltip"}}>{{.i18n.Tr "repo.commits.find"}}</button>
 			</form>
 		{{else if .IsDiffCompare}}
-			<a href="{{$.CommitRepoLink}}/commit/{{.BeforeCommitID}}" class="ui green sha label">{{if not .BaseIsCommit}}{{if .BaseIsBranch}}{{svg "octicon-git-branch"}}{{else if .BaseIsTag}}{{svg "octicon-tag"}}{{end}}{{.BaseBranch}}{{else}}{{ShortSha .BaseBranch}}{{end}}</a>
+			<a href="{{$.CommitRepoLink}}/commit/{{.BeforeCommitID}}" rel="nofollow" class="ui green sha label">{{if not .BaseIsCommit}}{{if .BaseIsBranch}}{{svg "octicon-git-branch"}}{{else if .BaseIsTag}}{{svg "octicon-tag"}}{{end}}{{.BaseBranch}}{{else}}{{ShortSha .BaseBranch}}{{end}}</a>
 			...
-			<a href="{{$.CommitRepoLink}}/commit/{{.AfterCommitID}}" class="ui green sha label">{{if not .HeadIsCommit}}{{if .HeadIsBranch}}{{svg "octicon-git-branch"}}{{else if .HeadIsTag}}{{svg "octicon-tag"}}{{end}}{{.HeadBranch}}{{else}}{{ShortSha .HeadBranch}}{{end}}</a>
+			<a href="{{$.CommitRepoLink}}/commit/{{.AfterCommitID}}" rel="nofollow" class="ui green sha label">{{if not .HeadIsCommit}}{{if .HeadIsBranch}}{{svg "octicon-git-branch"}}{{else if .HeadIsTag}}{{svg "octicon-tag"}}{{end}}{{.HeadBranch}}{{else}}{{ShortSha .HeadBranch}}{{end}}</a>
 		{{end}}
 	</div>
 </h4>
diff --git a/templates/repo/diff/compare.tmpl b/templates/repo/diff/compare.tmpl
index 54ea4615874d0..e02d3912acf52 100644
--- a/templates/repo/diff/compare.tmpl
+++ b/templates/repo/diff/compare.tmpl
@@ -33,7 +33,7 @@
 		{{- end -}}
 	{{- end -}}
 	<div class="ui segment choose branch">
-		<a href="{{$.HeadRepo.Link}}/compare/{{EscapePound $.HeadBranch}}{{$.CompareSeparator}}{{if not $.PullRequestCtx.SameRepo}}{{$.BaseName}}/{{$.Repository.Name}}:{{end}}{{EscapePound $.BaseBranch}}" title="{{.i18n.Tr "repo.pulls.switch_head_and_base"}}">{{svg "octicon-git-compare"}}</a>
+		<a href="{{$.HeadRepo.Link}}/compare/{{EscapePound $.HeadBranch}}{{$.CompareSeparator}}{{if not $.PullRequestCtx.SameRepo}}{{$.BaseName}}/{{$.Repository.Name}}:{{end}}{{EscapePound $.BaseBranch}}" title="{{.i18n.Tr "repo.pulls.switch_head_and_base"}}" rel="nofollow">{{svg "octicon-git-compare"}}</a>
 		<div class="ui floating filter dropdown" data-no-results="{{.i18n.Tr "repo.pulls.no_results"}}">
 			<div class="ui basic small button">
 				<span class="text">{{if $.PageIsComparePull}}{{.i18n.Tr "repo.pulls.compare_base"}}{{else}}{{.i18n.Tr "repo.compare.compare_base"}}{{end}}: {{$BaseCompareName}}:{{$.BaseBranch}}</span>
@@ -102,7 +102,7 @@
 				</div>
 			</div>
 		</div>
-		<a href="{{.RepoLink}}/compare/{{EscapePound .BaseBranch}}{{.OtherCompareSeparator}}{{if not $.PullRequestCtx.SameRepo}}{{$.HeadUser.Name}}/{{$.HeadRepo.Name}}:{{end}}{{EscapePound $.HeadBranch}}" title="{{.i18n.Tr "repo.pulls.switch_comparison_type"}}">{{.CompareSeparator}}</a>
+		<a href="{{.RepoLink}}/compare/{{EscapePound .BaseBranch}}{{.OtherCompareSeparator}}{{if not $.PullRequestCtx.SameRepo}}{{$.HeadUser.Name}}/{{$.HeadRepo.Name}}:{{end}}{{EscapePound $.HeadBranch}}" title="{{.i18n.Tr "repo.pulls.switch_comparison_type"}}" rel="nofollow">{{.CompareSeparator}}</a>
 		<div class="ui floating filter dropdown">
 			<div class="ui basic small button">
 				<span class="text">{{if $.PageIsComparePull}}{{.i18n.Tr "repo.pulls.compare_compare"}}{{else}}{{.i18n.Tr "repo.compare.compare_head"}}{{end}}: {{$HeadCompareName}}:{{$.HeadBranch}}</span>
diff --git a/templates/repo/editor/edit.tmpl b/templates/repo/editor/edit.tmpl
index b7e1589aa14e0..c485096587c4f 100644
--- a/templates/repo/editor/edit.tmpl
+++ b/templates/repo/editor/edit.tmpl
@@ -19,10 +19,10 @@
 								<input id="file-name" value="{{$v}}" placeholder="{{$.i18n.Tr "repo.editor.name_your_file"}}" data-editorconfig="{{$.Editorconfig}}" required autofocus>
 								<span class="poping up" data-content="{{$.i18n.Tr "repo.editor.filename_help"}}" data-position="bottom center" data-variation="tiny inverted">{{svg "octicon-info"}}</span>
 							{{else}}
-								<span class="section"><a href="{{EscapePound $.BranchLink}}/{{index $.TreePaths $i | EscapePound}}">{{$v}}</a></span>
+								<span class="section"><a href="{{EscapePound $.BranchLink}}/{{index $.TreePaths $i | EscapePound}}" rel="nofollow">{{$v}}</a></span>
 							{{end}}
 						{{end}}
-						<span>{{.i18n.Tr "repo.editor.or"}} <a href="{{EscapePound $.BranchLink}}{{if not .IsNewFile}}/{{EscapePound .TreePath}}{{end}}">{{.i18n.Tr "repo.editor.cancel_lower"}}</a></span>
+						<span>{{.i18n.Tr "repo.editor.or"}} <a href="{{EscapePound $.BranchLink}}{{if not .IsNewFile}}/{{EscapePound .TreePath}}{{end}}" rel="nofollow">{{.i18n.Tr "repo.editor.cancel_lower"}}</a></span>
 						<input type="hidden" id="tree_path" name="tree_path" value="{{.TreePath}}" required>
 					</div>
 				</div>
diff --git a/templates/repo/editor/upload.tmpl b/templates/repo/editor/upload.tmpl
index fb00615abdb2a..e230bdbdc1063 100644
--- a/templates/repo/editor/upload.tmpl
+++ b/templates/repo/editor/upload.tmpl
@@ -17,10 +17,10 @@
 								<input type="text" id="file-name" value="{{$v}}" placeholder="{{$.i18n.Tr "repo.editor.add_subdir"}}" autofocus>
 								<span class="poping up" data-content="{{$.i18n.Tr "repo.editor.filename_help"}}" data-position="bottom center" data-variation="tiny inverted">{{svg "octicon-info"}}</span>
 							{{else}}
-								<span class="section"><a href="{{EscapePound $.BranchLink}}/{{index $.TreePaths $i | EscapePound}}">{{$v}}</a></span>
+								<span class="section"><a href="{{EscapePound $.BranchLink}}/{{index $.TreePaths $i | EscapePound}}" rel="nofollow">{{$v}}</a></span>
 							{{end}}
 						{{end}}
-						<span>{{.i18n.Tr "repo.editor.or"}} <a href="{{EscapePound $.BranchLink}}{{if not .IsNewFile}}/{{EscapePound .TreePath}}{{end}}">{{.i18n.Tr "repo.editor.cancel_lower"}}</a></span>
+						<span>{{.i18n.Tr "repo.editor.or"}} <a href="{{EscapePound $.BranchLink}}{{if not .IsNewFile}}/{{EscapePound .TreePath}}{{end}}" rel="nofollow">{{.i18n.Tr "repo.editor.cancel_lower"}}</a></span>
 						<input type="hidden" id="tree_path" name="tree_path" value="{{.TreePath}}" required>
 					</div>
 				</div>
diff --git a/templates/repo/header.tmpl b/templates/repo/header.tmpl
index 49a651e6c5a86..7559d5ff1f1c5 100644
--- a/templates/repo/header.tmpl
+++ b/templates/repo/header.tmpl
@@ -12,7 +12,7 @@
 					{{end}}
 					<a href="{{AppSubUrl}}/{{.Owner.Name}}">{{.Owner.Name}}</a>
 					<div class="mx-2">/</div>
-					<a href="{{$.RepoLink}}">{{.Name}}</a>
+					<a href="{{$.RepoLink}}" rel="nofollow">{{.Name}}</a>
 					<div class="labels df ac fw">
 						{{if .IsTemplate}}
 							{{if .IsPrivate}}
@@ -37,8 +37,8 @@
 					</div>
 				</div>
 				{{if .IsMirror}}<div class="fork-flag">{{$.i18n.Tr "repo.mirror_from"}} <a target="_blank" rel="noopener noreferrer" href="{{if .SanitizedOriginalURL}}{{.SanitizedOriginalURL}}{{else}}{{(MirrorRemoteAddress $.Mirror).Address}}{{end}}">{{if .SanitizedOriginalURL}}{{.SanitizedOriginalURL}}{{else}}{{(MirrorRemoteAddress $.Mirror).Address}}{{end}}</a></div>{{end}}
-				{{if .IsFork}}<div class="fork-flag">{{$.i18n.Tr "repo.forked_from"}} <a href="{{.BaseRepo.Link}}">{{SubStr .BaseRepo.RelLink 1 -1}}</a></div>{{end}}
-				{{if .IsGenerated}}<div class="fork-flag">{{$.i18n.Tr "repo.generated_from"}} <a href="{{.TemplateRepo.Link}}">{{SubStr .TemplateRepo.RelLink 1 -1}}</a></div>{{end}}
+				{{if .IsFork}}<div class="fork-flag">{{$.i18n.Tr "repo.forked_from"}} <a href="{{.BaseRepo.Link}}" rel="nofollow">{{SubStr .BaseRepo.RelLink 1 -1}}</a></div>{{end}}
+				{{if .IsGenerated}}<div class="fork-flag">{{$.i18n.Tr "repo.generated_from"}} <a href="{{.TemplateRepo.Link}}" rel="nofollow">{{SubStr .TemplateRepo.RelLink 1 -1}}</a></div>{{end}}
 			</div>
 			{{if not .IsBeingCreated}}
 				<div class="repo-buttons">
@@ -133,7 +133,7 @@
 				{{end}}
 
 				{{ if and (not .UnitProjectsGlobalDisabled) (.Permission.CanRead $.UnitTypeProjects)}}
-					<a href="{{.RepoLink}}/projects" class="{{ if .IsProjectsPage }}active{{end}} item">
+					<a href="{{.RepoLink}}/projects" rel="nofollow" class="{{ if .IsProjectsPage }}active{{end}} item">
 						{{svg "octicon-project"}} {{.i18n.Tr "repo.project_board"}}
 						{{if .Repository.NumOpenProjects}}
 							<span class="ui blue small label">{{CountFmt .Repository.NumOpenProjects}}</span>
diff --git a/templates/repo/home.tmpl b/templates/repo/home.tmpl
index 0c377251fa3f6..051d611e41ca6 100644
--- a/templates/repo/home.tmpl
+++ b/templates/repo/home.tmpl
@@ -64,30 +64,30 @@
 			{{if eq $n 0}}
 				{{if and .CanCompareOrPull .IsViewBranch (not .Repository.IsArchived)}}
 					<div class="fitted item mx-0">
-						<a href="{{.BaseRepo.Link}}/compare/{{.BaseRepo.DefaultBranch | EscapePound}}...{{if ne .Repository.Owner.Name .BaseRepo.Owner.Name}}{{.Repository.Owner.Name}}{{if .BaseRepo.IsFork}}/{{.Repository.Name}}{{end}}:{{end}}{{.BranchName | EscapePound}}">
+						<a href="{{.BaseRepo.Link}}/compare/{{.BaseRepo.DefaultBranch | EscapePound}}...{{if ne .Repository.Owner.Name .BaseRepo.Owner.Name}}{{.Repository.Owner.Name}}{{if .BaseRepo.IsFork}}/{{.Repository.Name}}{{end}}:{{end}}{{.BranchName | EscapePound}}" rel="nofollow">
 							<button id="new-pull-request" class="ui compact basic button">{{if .PullRequestCtx.Allowed}}{{.i18n.Tr "repo.pulls.compare_changes"}}{{else}}{{.i18n.Tr "action.compare_branch"}}{{end}}</button>
 						</a>
 					</div>
 				{{end}}
 			{{else}}
-				<div class="fitted item"><span class="ui breadcrumb repo-path"><a class="section" href="{{.RepoLink}}/src/{{EscapePound .BranchNameSubURL}}" title="{{.Repository.Name}}">{{EllipsisString .Repository.Name 30}}</a>{{range $i, $v := .TreeNames}}<span class="divider">/</span>{{if eq $i $l}}<span class="active section" title="{{$v}}">{{EllipsisString $v 30}}</span>{{else}}{{ $p := index $.Paths $i}}<span class="section"><a href="{{EscapePound $.BranchLink}}/{{EscapePound $p}}" title="{{$v}}">{{EllipsisString $v 30}}</a></span>{{end}}{{end}}</span></div>
+				<div class="fitted item"><span class="ui breadcrumb repo-path"><a class="section" href="{{.RepoLink}}/src/{{EscapePound .BranchNameSubURL}}" title="{{.Repository.Name}}">{{EllipsisString .Repository.Name 30}}</a>{{range $i, $v := .TreeNames}}<span class="divider">/</span>{{if eq $i $l}}<span class="active section" title="{{$v}}">{{EllipsisString $v 30}}</span>{{else}}{{ $p := index $.Paths $i}}<span class="section"><a href="{{EscapePound $.BranchLink}}/{{EscapePound $p}}" title="{{$v}}" rel="nofollow">{{EllipsisString $v 30}}</a></span>{{end}}{{end}}</span></div>
 			{{end}}
 			<div class="right fitted item mr-0" id="file-buttons">
 				<div class="ui tiny primary buttons">
 					{{if .Repository.CanEnableEditor}}
 						{{if .CanAddFile}}
-							<a href="{{.RepoLink}}/_new/{{EscapePound .BranchName}}/{{EscapePound .TreePath}}" class="ui button">
+							<a href="{{.RepoLink}}/_new/{{EscapePound .BranchName}}/{{EscapePound .TreePath}}" class="ui button" rel="nofollow">
 								{{.i18n.Tr "repo.editor.new_file"}}
 							</a>
 						{{end}}
 						{{if .CanUploadFile}}
-							<a href="{{.RepoLink}}/_upload/{{EscapePound .BranchName}}/{{EscapePound .TreePath}}" class="ui button">
+							<a href="{{.RepoLink}}/_upload/{{EscapePound .BranchName}}/{{EscapePound .TreePath}}" class="ui button" rel="nofollow">
 								{{.i18n.Tr "repo.editor.upload_file"}}
 							</a>
 						{{end}}
 					{{end}}
 					{{if and (ne $n 0) (not .IsViewFile) (not .IsBlame) }}
-						<a href="{{.RepoLink}}/commits/{{EscapePound .BranchNameSubURL}}/{{EscapePound .TreePath}}" class="ui button">
+						<a href="{{.RepoLink}}/commits/{{EscapePound .BranchNameSubURL}}/{{EscapePound .TreePath}}" class="ui button" rel="nofollow">
 							{{.i18n.Tr "repo.file_history"}}
 						</a>
 					{{end}}
@@ -98,7 +98,7 @@
 				{{if eq $n 0}}
 					{{if .Repository.IsTemplate}}
 						<div class="ui tiny blue buttons">
-							<a href="{{AppSubUrl}}/repo/create?template_id={{.Repository.ID}}" class="ui button">
+							<a href="{{AppSubUrl}}/repo/create?template_id={{.Repository.ID}}" class="ui button" rel="nofollow">
 								{{.i18n.Tr "repo.use_template"}}
 							</a>
 						</div>
diff --git a/templates/repo/issue/branch_selector_field.tmpl b/templates/repo/issue/branch_selector_field.tmpl
index e115b4a3f4137..0ee592be3336f 100644
--- a/templates/repo/issue/branch_selector_field.tmpl
+++ b/templates/repo/issue/branch_selector_field.tmpl
@@ -33,7 +33,7 @@
 		</div>
 		<div id="branch-list" class="scrolling menu reference-list-menu {{if not .Issue}}new-issue{{end}}">
 			{{if .Issue.Ref}}
-				<div class="item text small" data-id="" data-id-selector="#ref_selector"><strong><a href="#">{{$.i18n.Tr "repo.clear_ref"}}</a></strong></div>
+				<div class="item text small" data-id="" data-id-selector="#ref_selector"><strong><a href="#" rel="nofollow">{{$.i18n.Tr "repo.clear_ref"}}</a></strong></div>
 			{{end}}
 			{{range .Branches}}
 				<div class="item" data-id="refs/heads/{{.}}" data-name="{{.}}" data-id-selector="#ref_selector">{{.}}</div>
@@ -41,7 +41,7 @@
 		</div>
 		<div id="tag-list" class="scrolling menu reference-list-menu {{if not .Issue}}new-issue{{end}}" style="display: none">
 			{{if .Issue.Ref}}
-				<div class="item text small" data-id="" data-id-selector="#ref_selector"><strong><a href="#">{{.i18n.Tr "repo.clear_ref"}}</a></strong></div>
+				<div class="item text small" data-id="" data-id-selector="#ref_selector"><strong><a href="#" rel="nofollow">{{.i18n.Tr "repo.clear_ref"}}</a></strong></div>
 			{{end}}
 			{{range .Tags}}
 				<div class="item" data-id="refs/tags/{{.}}" data-name="tags/{{.}}" data-id-selector="#ref_selector">{{.}}</div>
diff --git a/templates/repo/issue/choose.tmpl b/templates/repo/issue/choose.tmpl
index 0cec1ef63cbbe..ae9a2824a6b12 100644
--- a/templates/repo/issue/choose.tmpl
+++ b/templates/repo/issue/choose.tmpl
@@ -14,7 +14,7 @@
 						<br/>{{.About | RenderEmojiPlain}}
 					</div>
 					<div class="column right aligned">
-						<a href="{{$.RepoLink}}/issues/new?template={{.FileName}}{{if $.milestone}}&milestone={{$.milestone}}{{end}}" class="ui green button">{{$.i18n.Tr "repo.issues.choose.get_started"}}</a>
+						<a href="{{$.RepoLink}}/issues/new?template={{.FileName}}{{if $.milestone}}&milestone={{$.milestone}}{{end}}" class="ui green button" rel="nofollow">{{$.i18n.Tr "repo.issues.choose.get_started"}}</a>
 					</div>
 				</div>
 			</div>
@@ -26,7 +26,7 @@
 					<br/>{{.i18n.Tr "repo.issues.choose.blank_about"}}
 				</div>
 				<div class="column right aligned">
-					<a href="{{.RepoLink}}/issues/new{{if .milestone}}?milestone={{.milestone}}{{end}}" class="ui green button">{{$.i18n.Tr "repo.issues.choose.get_started"}}</a>
+					<a href="{{.RepoLink}}/issues/new{{if .milestone}}?milestone={{.milestone}}{{end}}" class="ui green button" rel="nofollow">{{$.i18n.Tr "repo.issues.choose.get_started"}}</a>
 				</div>
 			</div>
 		</div>
diff --git a/templates/repo/issue/milestones.tmpl b/templates/repo/issue/milestones.tmpl
index 448d758e3ebfd..bd04a59167509 100644
--- a/templates/repo/issue/milestones.tmpl
+++ b/templates/repo/issue/milestones.tmpl
@@ -61,7 +61,7 @@
 		<div class="milestone list">
 			{{range .Milestones}}
 				<li class="item">
-					{{svg "octicon-milestone" 16 "mr-2"}} <a href="{{$.RepoLink}}/milestone/{{.ID}}">{{.Name}}</a>
+					{{svg "octicon-milestone" 16 "mr-2"}} <a href="{{$.RepoLink}}/milestone/{{.ID}}" rel="nofollow">{{.Name}}</a>
 					<div class="ui right green progress" data-percent="{{.Completeness}}">
 						<div class="bar" {{if not .Completeness}}style="background-color: transparent"{{end}}>
 							<div class="progress"></div>
@@ -88,7 +88,7 @@
 					</div>
 					{{if and (or $.CanWriteIssues $.CanWritePulls) (not $.Repository.IsArchived)}}
 						<div class="ui right operate">
-							<a href="{{$.Link}}/{{.ID}}/edit" data-id={{.ID}} data-title={{.Name}}>{{svg "octicon-pencil"}} {{$.i18n.Tr "repo.issues.label_edit"}}</a>
+							<a href="{{$.Link}}/{{.ID}}/edit" data-id={{.ID}} data-title={{.Name}} rel="nofollow">{{svg "octicon-pencil"}} {{$.i18n.Tr "repo.issues.label_edit"}}</a>
 							{{if .IsClosed}}
 								<a class="link-action" href data-url="{{$.Link}}/{{.ID}}/open">{{svg "octicon-check"}} {{$.i18n.Tr "repo.milestones.open"}}</a>
 							{{else}}
diff --git a/templates/repo/issue/view_content/sidebar.tmpl b/templates/repo/issue/view_content/sidebar.tmpl
index ed700617ea328..e0b6736b423a7 100644
--- a/templates/repo/issue/view_content/sidebar.tmpl
+++ b/templates/repo/issue/view_content/sidebar.tmpl
@@ -69,7 +69,7 @@
 								{{- else}}grey{{end}} right ">
 
 								{{if .CanChange}}
-									<a href="#" class="ui poping up icon re-request-review {{if .Checked}}checked{{end}}" data-content="{{if .Checked}} {{$.i18n.Tr "repo.issues.remove_request_review"}} {{else}} {{$.i18n.Tr "repo.issues.re_request_review"}} {{end}}" data-issue-id="{{$.Issue.ID}}"  data-id="{{.ItemID}}" data-update-url="{{$.RepoLink}}/issues/request_review">
+									<a href="#" class="ui poping up icon re-request-review {{if .Checked}}checked{{end}}" data-content="{{if .Checked}} {{$.i18n.Tr "repo.issues.remove_request_review"}} {{else}} {{$.i18n.Tr "repo.issues.re_request_review"}} {{end}}" data-issue-id="{{$.Issue.ID}}"  data-id="{{.ItemID}}" data-update-url="{{$.RepoLink}}/issues/request_review" rel="nofollow">
 										{{if .Checked}} {{svg "octicon-trash"}} {{else}} {{svg "octicon-sync"}} {{end}}
 									</a>
 								{{end}}
@@ -79,7 +79,7 @@
 					{{end}}
 					{{range .OriginalReviews}}
 						<div class="item" style="margin-bottom: 10px;">
-							<a href="{{$.Repository.OriginalURL}}" class="ui poping up" data-content="{{$.i18n.Tr "repo.migrated_from_fake" $.Repository.GetOriginalURLHostname | Safe }}">
+							<a href="{{$.Repository.OriginalURL}}" class="ui poping up" data-content="{{$.i18n.Tr "repo.migrated_from_fake" $.Repository.GetOriginalURLHostname | Safe }}" rel="nofollow">
 								<span class="text black">
 									{{svg (MigrationIcon $.Repository.GetOriginalURLHostname)}}
 									{{ .OriginalAuthor }}
diff --git a/templates/repo/issue/view_title.tmpl b/templates/repo/issue/view_title.tmpl
index b6bf965a15fbc..a0d04c6ae4461 100644
--- a/templates/repo/issue/view_title.tmpl
+++ b/templates/repo/issue/view_title.tmpl
@@ -32,11 +32,11 @@
 	{{if .Issue.IsPull}}
 		{{$headHref := .HeadTarget|Escape}}
 		{{if .HeadBranchHTMLURL}}
-			{{$headHref = printf "<a href=\"%s\">%s</a>" .HeadBranchHTMLURL $headHref}}
+			{{$headHref = printf "<a href=\"%s\" rel=\"nofollow\">%s</a>" .HeadBranchHTMLURL $headHref}}
 		{{end}}
 		{{$baseHref := .BaseTarget|Escape}}
 		{{if .BaseBranchHTMLURL}}
-			{{$baseHref = printf "<a href=\"%s\">%s</a>" .BaseBranchHTMLURL $baseHref}}
+			{{$baseHref = printf "<a href=\"%s\" rel=\"nofollow\">%s</a>" .BaseBranchHTMLURL $baseHref}}
 		{{end}}
 		{{if .Issue.PullRequest.HasMerged}}
 			{{ $mergedStr:= TimeSinceUnix .Issue.PullRequest.MergedUnix $.Lang }}
diff --git a/templates/repo/projects/list.tmpl b/templates/repo/projects/list.tmpl
index ec7370709f176..ddd93f67aab0c 100644
--- a/templates/repo/projects/list.tmpl
+++ b/templates/repo/projects/list.tmpl
@@ -53,7 +53,7 @@
 					</div>
 					{{if and (or $.CanWriteIssues $.CanWritePulls) (not $.Repository.IsArchived)}}
 					<div class="ui right operate">
-						<a href="{{$.Link}}/{{.ID}}/edit" data-id={{.ID}} data-title={{.Title}}>{{svg "octicon-pencil"}} {{$.i18n.Tr "repo.issues.label_edit"}}</a>
+						<a href="{{$.Link}}/{{.ID}}/edit" data-id={{.ID}} data-title={{.Title}} rel="nofollow">{{svg "octicon-pencil"}} {{$.i18n.Tr "repo.issues.label_edit"}}</a>
 						{{if .IsClosed}}
 							<a class="link-action" href data-url="{{$.Link}}/{{.ID}}/open">{{svg "octicon-check"}} {{$.i18n.Tr "repo.projects.open"}}</a>
 						{{else}}
diff --git a/templates/repo/projects/view.tmpl b/templates/repo/projects/view.tmpl
index 082f4d8eb99e8..12bdc36d419b0 100644
--- a/templates/repo/projects/view.tmpl
+++ b/templates/repo/projects/view.tmpl
@@ -222,7 +222,7 @@
 							{{- end }}
 							{{- range index $.LinkedPRs .ID }}
 							<div class="meta my-2">
-								<a href="{{$.RepoLink}}/pulls/{{ .Index }}">
+								<a href="{{$.RepoLink}}/pulls/{{ .Index }}" rel="nofollow">
 									<span class="m-0 {{if .PullRequest.HasMerged}}purple{{else if .IsClosed}}red{{else}}green{{end}}">{{svg "octicon-git-merge" 16 "mr-2 vm"}}</span>
 									<span class="vm">{{ .Title}} <span class="text light grey">#{{.Index}}</span></span>
 								</a>
diff --git a/templates/repo/pulls/fork.tmpl b/templates/repo/pulls/fork.tmpl
index bf310e15968c7..184f55833ae65 100644
--- a/templates/repo/pulls/fork.tmpl
+++ b/templates/repo/pulls/fork.tmpl
@@ -37,7 +37,7 @@
 
 					<div class="inline field">
 						<label>{{.i18n.Tr "repo.fork_from"}}</label>
-						<a href="{{AppSubUrl}}/{{.ForkFrom}}">{{.ForkFrom}}</a>
+						<a href="{{AppSubUrl}}/{{.ForkFrom}}" rel="nofollow">{{.ForkFrom}}</a>
 					</div>
 					<div class="inline required field {{if .Err_RepoName}}error{{end}}">
 						<label for="repo_name">{{.i18n.Tr "repo.repo_name"}}</label>
diff --git a/templates/repo/pulls/status.tmpl b/templates/repo/pulls/status.tmpl
index f029d5cb6c7cb..2a19eb2a760ca 100644
--- a/templates/repo/pulls/status.tmpl
+++ b/templates/repo/pulls/status.tmpl
@@ -25,7 +25,7 @@
 				{{if $.is_context_required}}
 					{{if (call $.is_context_required .Context)}}<div class="ui label">{{$.i18n.Tr "repo.pulls.status_checks_requested"}}</div>{{end}}
 				{{end}}
-				<span class="ui">{{if .TargetURL}}<a href="{{.TargetURL}}">{{$.i18n.Tr "repo.pulls.status_checks_details"}}</a>{{end}}</span>
+				<span class="ui">{{if .TargetURL}}<a href="{{.TargetURL}}" rel="nofollow">{{$.i18n.Tr "repo.pulls.status_checks_details"}}</a>{{end}}</span>
 			</div>
 		</div>
 	{{end}}
diff --git a/templates/repo/release/list.tmpl b/templates/repo/release/list.tmpl
index 5f06bf45d4098..cdf772fca42c1 100644
--- a/templates/repo/release/list.tmpl
+++ b/templates/repo/release/list.tmpl
@@ -99,7 +99,7 @@
 									<a href="{{AppSubUrl}}/{{.Publisher.Name}}">{{.Publisher.Name}}</a>
 								</span>
 								{{ end }}
-								<span class="ahead"><a href="{{$.RepoLink}}/compare/{{.TagName | EscapePound}}...{{.Target}}">{{$.i18n.Tr "repo.release.ahead.commits" .NumCommitsBehind | Str2html}}</a> {{$.i18n.Tr "repo.release.ahead.target" $.DefaultBranch}}</span>
+								<span class="ahead"><a href="{{$.RepoLink}}/compare/{{.TagName | EscapePound}}...{{.Target}}" rel="nofollow">{{$.i18n.Tr "repo.release.ahead.commits" .NumCommitsBehind | Str2html}}</a> {{$.i18n.Tr "repo.release.ahead.target" $.DefaultBranch}}</span>
 							</p>
 							<div class="download">
 							{{if $.Permission.CanRead $.UnitTypeCode}}
@@ -110,7 +110,7 @@
 							</div>
 						{{else}}
 							<h4 class="release-list-title df ac">
-								<a href="{{$.RepoLink}}/releases/tag/{{.TagName | EscapePound}}">{{.Title}}</a>
+								<a href="{{$.RepoLink}}/releases/tag/{{.TagName | EscapePound}}" rel="nofollow">{{.Title}}</a>
 								{{if $.CanCreateRelease}}
 									<small class="ml-2">
 										(<a href="{{$.RepoLink}}/releases/edit/{{.TagName | EscapePound}}" rel="nofollow">{{$.i18n.Tr "repo.release.edit"}}</a>)
diff --git a/templates/repo/search.tmpl b/templates/repo/search.tmpl
index bd70690e061ca..fb279a6f8264e 100644
--- a/templates/repo/search.tmpl
+++ b/templates/repo/search.tmpl
@@ -45,7 +45,7 @@
 										<tr>
 											<td class="lines-num">
 												{{range .LineNumbers}}
-													<a href="{{EscapePound $.SourcePath}}/src/commit/{{$result.CommitID}}/{{EscapePound $result.Filename}}#L{{.}}"><span>{{.}}</span></a>
+													<a href="{{EscapePound $.SourcePath}}/src/commit/{{$result.CommitID}}/{{EscapePound $result.Filename}}#L{{.}}" rel="nofollow"><span>{{.}}</span></a>
 												{{end}}
 											</td>
 											<td class="lines-code chroma"><code class="code-inner">{{.FormattedLines | Safe}}</code></td>
diff --git a/templates/repo/settings/lfs.tmpl b/templates/repo/settings/lfs.tmpl
index 38f74b8a9cc86..837ae7e58ba57 100644
--- a/templates/repo/settings/lfs.tmpl
+++ b/templates/repo/settings/lfs.tmpl
@@ -17,7 +17,7 @@
 					<tr>
 						<td>
 							<span class="text sha label">
-								<a href="{{$.Link}}/show/{{.Oid}}" title="{{.Oid}}" class="ui detail icon button brown truncate">
+								<a href="{{$.Link}}/show/{{.Oid}}" title="{{.Oid}}" class="ui detail icon button brown truncate" rel="nofollow">
 									{{ShortSha .Oid}}
 								</a>
 							</span>
diff --git a/templates/repo/settings/lfs_file.tmpl b/templates/repo/settings/lfs_file.tmpl
index 478c034e11074..960a0433a9898 100644
--- a/templates/repo/settings/lfs_file.tmpl
+++ b/templates/repo/settings/lfs_file.tmpl
@@ -6,7 +6,7 @@
 		{{template "base/alert" .}}
 		<div class="tab-size-8 non-diff-file-content">
 			<h4 class="ui top attached header">
-				<a href="{{.LFSFilesLink}}">{{.i18n.Tr "repo.settings.lfs"}}</a> / <span class="truncate sha">{{.LFSFile.Oid}}</span>
+				<a href="{{.LFSFilesLink}}" rel="nofollow">{{.i18n.Tr "repo.settings.lfs"}}</a> / <span class="truncate sha">{{.LFSFile.Oid}}</span>
 				<div class="ui right">
 					<a class="ui blue show-panel button" href="{{.LFSFilesLink}}/find?oid={{.LFSFile.Oid}}&size={{.LFSFile.Size}}">{{$.i18n.Tr "repo.settings.lfs_findcommits"}}</a>
 				</div>
diff --git a/templates/repo/settings/lfs_file_find.tmpl b/templates/repo/settings/lfs_file_find.tmpl
index 83a2e317d57fc..40866365a6a36 100644
--- a/templates/repo/settings/lfs_file_find.tmpl
+++ b/templates/repo/settings/lfs_file_find.tmpl
@@ -6,7 +6,7 @@
 		{{template "base/alert" .}}
 		<div class="tab-size-8 non-diff-file-content">
 			<h4 class="ui top attached header">
-				<a href="{{.LFSFilesLink}}">{{.i18n.Tr "repo.settings.lfs"}}</a> / <span class="truncate sha">{{.Oid}}</span>
+				<a href="{{.LFSFilesLink}}" rel="nofollow">{{.i18n.Tr "repo.settings.lfs"}}</a> / <span class="truncate sha">{{.Oid}}</span>
 			</h4>
 			<table id="lfs-files-find-table" class="ui attached segment single line table">
 				<tbody>
@@ -14,11 +14,11 @@
 						<tr>
 							<td>
 								{{svg "octicon-file"}}
-								<a href="{{EscapePound $.RepoLink}}/src/commit/{{.SHA}}/{{EscapePound .Name}}" title="{{.Name}}">{{.Name}}</a>
+								<a href="{{EscapePound $.RepoLink}}/src/commit/{{.SHA}}/{{EscapePound .Name}}" title="{{.Name}}" rel="nofollow">{{.Name}}</a>
 							</td>
 							<td class="message">
 								<span class="truncate">
-									<a href="{{$.RepoLink}}/commit/{{.SHA}}" title="{{.Summary | RenderEmojiPlain}}">
+									<a href="{{$.RepoLink}}/commit/{{.SHA}}" title="{{.Summary | RenderEmojiPlain}}" rel="nofollow">
 										{{.Summary | RenderEmoji}}
 									</a>
 								</span>
diff --git a/templates/repo/settings/lfs_locks.tmpl b/templates/repo/settings/lfs_locks.tmpl
index 84269dc612bef..f174f1fd4ced0 100644
--- a/templates/repo/settings/lfs_locks.tmpl
+++ b/templates/repo/settings/lfs_locks.tmpl
@@ -6,7 +6,7 @@
 		{{template "base/alert" .}}
 		<div class="tab-size-8 non-diff-file-content">
 			<h4 class="ui top attached header">
-				<a href="{{.LFSFilesLink}}">{{.i18n.Tr "repo.settings.lfs"}}</a> / {{.i18n.Tr "repo.settings.lfs_locks"}} ({{.i18n.Tr "admin.total" .Total}})
+				<a href="{{.LFSFilesLink}}" rel="nofollow">{{.i18n.Tr "repo.settings.lfs"}}</a> / {{.i18n.Tr "repo.settings.lfs_locks"}} ({{.i18n.Tr "admin.total" .Total}})
 			</h4>
 			<div class="ui attached segment">
 				<form class="ui form ignore-dirty" method="POST">
@@ -24,7 +24,7 @@
 							<td>
 								{{if index $.Linkable $index}}
 									{{svg "octicon-file"}}
-								<a href="{{EscapePound $.RepoLink}}/src/branch/{{EscapePound $lock.Repo.DefaultBranch}}/{{EscapePound $lock.Path}}" title="{{$lock.Path}}">{{$lock.Path}}</a>
+								<a href="{{EscapePound $.RepoLink}}/src/branch/{{EscapePound $lock.Repo.DefaultBranch}}/{{EscapePound $lock.Path}}" title="{{$lock.Path}}" rel="nofollow">{{$lock.Path}}</a>
 								{{else}}
 									{{svg "octicon-diff"}}
 								<span class="poping up" title="{{$.i18n.Tr "repo.settings.lfs_lock_file_no_exist"}}">{{$lock.Path}}</span>
diff --git a/templates/repo/settings/lfs_pointers.tmpl b/templates/repo/settings/lfs_pointers.tmpl
index bf23062ae3cc7..d30d037ffbf31 100644
--- a/templates/repo/settings/lfs_pointers.tmpl
+++ b/templates/repo/settings/lfs_pointers.tmpl
@@ -37,7 +37,7 @@
 						<tr>
 							<td>
 								<span class="text sha label" title="{{.SHA}}">
-									<a href="{{$.RepoLink}}/raw/blob/{{.SHA}}" rel="nofollow" target="_blank" class="ui detail icon button truncate">
+									<a href="{{$.RepoLink}}/raw/blob/{{.SHA}}" rel="nofollow" target="_blank" class="ui detail icon button truncate" rel="nofollow">
 										{{ShortSha .SHA}}
 									</a>
 								</span>
@@ -45,7 +45,7 @@
 							<td>
 								<span class="text sha label" title="{{.Oid}}">
 									{{if and .Exists .InRepo}}
-										<a href="{{$.LFSFilesLink}}/show/{{.Oid}}" rel="nofollow" target="_blank" class="ui text detail icon button brown truncate">
+										<a href="{{$.LFSFilesLink}}/show/{{.Oid}}" rel="nofollow" target="_blank" class="ui text detail icon button brown truncate" rel="nofollow">
 											{{ShortSha .Oid}}
 										</a>
 									{{else}}
diff --git a/templates/repo/settings/nav.tmpl b/templates/repo/settings/nav.tmpl
index 31672cb5ead0f..2e535ea14bfbd 100644
--- a/templates/repo/settings/nav.tmpl
+++ b/templates/repo/settings/nav.tmpl
@@ -2,17 +2,17 @@
 	<p class="panel-header"><strong>{{.i18n.Tr "repo.settings"}}</strong></p>
 	<div class="panel-body">
 		<ul class="menu menu-vertical switching-list grid-1-5 left">
-			<li {{if .PageIsSettingsOptions}}class="current"{{end}}><a href="{{.RepoLink}}/settings">{{.i18n.Tr "repo.settings.options"}}</a></li>
-			<li {{if .PageIsSettingsCollaboration}}class="current"{{end}}><a href="{{.RepoLink}}/settings/collaboration">{{.i18n.Tr "repo.settings.collaboration"}}</a></li>
-			<li {{if .PageIsSettingsBranches}}class="current"{{end}}><a href="{{.RepoLink}}/settings/branches">{{.i18n.Tr "repo.settings.branches"}}</a></li>
-			<li {{if .PageIsSettingsTags}}class="current"{{end}}><a href="{{.RepoLink}}/settings/tags">{{.i18n.Tr "repo.settings.tags"}}</a></li>
+			<li {{if .PageIsSettingsOptions}}class="current"{{end}}><a href="{{.RepoLink}}/settings" rel="nofollow">{{.i18n.Tr "repo.settings.options"}}</a></li>
+			<li {{if .PageIsSettingsCollaboration}}class="current"{{end}}><a href="{{.RepoLink}}/settings/collaboration" rel="nofollow">{{.i18n.Tr "repo.settings.collaboration"}}</a></li>
+			<li {{if .PageIsSettingsBranches}}class="current"{{end}}><a href="{{.RepoLink}}/settings/branches" rel="nofollow">{{.i18n.Tr "repo.settings.branches"}}</a></li>
+			<li {{if .PageIsSettingsTags}}class="current"{{end}}><a href="{{.RepoLink}}/settings/tags" rel="nofollow">{{.i18n.Tr "repo.settings.tags"}}</a></li>
 			{{if not DisableWebhooks}}
-			<li {{if .PageIsSettingsHooks}}class="current"{{end}}><a href="{{.RepoLink}}/settings/hooks">{{.i18n.Tr "repo.settings.hooks"}}</a></li>
+			<li {{if .PageIsSettingsHooks}}class="current"{{end}}><a href="{{.RepoLink}}/settings/hooks" rel="nofollow">{{.i18n.Tr "repo.settings.hooks"}}</a></li>
 			{{end}}
 			{{if or .SignedUser.AllowGitHook .SignedUser.IsAdmin}}
-				<li {{if .PageIsSettingsGitHooks}}class="current"{{end}}><a href="{{.RepoLink}}/settings/hooks/git">{{.i18n.Tr "repo.settings.githooks"}}</a></li>
+				<li {{if .PageIsSettingsGitHooks}}class="current"{{end}}><a href="{{.RepoLink}}/settings/hooks/git" rel="nofollow">{{.i18n.Tr "repo.settings.githooks"}}</a></li>
 			{{end}}
-			<li {{if .PageIsSettingsKeys}}class="current"{{end}}><a href="{{.RepoLink}}/settings/keys">{{.i18n.Tr "repo.settings.deploy_keys"}}</a></li>
+			<li {{if .PageIsSettingsKeys}}class="current"{{end}}><a href="{{.RepoLink}}/settings/keys" rel="nofollow">{{.i18n.Tr "repo.settings.deploy_keys"}}</a></li>
 		</ul>
 	</div>
 </div>
diff --git a/templates/repo/settings/webhook/base_list.tmpl b/templates/repo/settings/webhook/base_list.tmpl
index e96d086039c84..58ee2522aab35 100644
--- a/templates/repo/settings/webhook/base_list.tmpl
+++ b/templates/repo/settings/webhook/base_list.tmpl
@@ -54,8 +54,8 @@
 				{{end}}
 				<a class="text truncate" title="{{.URL}}" href="{{$.BaseLink}}/{{.ID}}">{{.URL}}</a>
 				<div class="ui right" style="display: inline-flex">
-					<span class="text blue px-2"><a href="{{$.BaseLink}}/{{.ID}}">{{svg "octicon-pencil"}}</a></span>
-					<span class="text red px-2"><a class="delete-button" data-url="{{$.Link}}/delete" data-id="{{.ID}}">{{svg "octicon-trash"}}</a></span>
+					<span class="text blue px-2"><a href="{{$.BaseLink}}/{{.ID}}" rel="nofollow">{{svg "octicon-pencil"}}</a></span>
+					<span class="text red px-2"><a class="delete-button" data-url="{{$.Link}}/delete" data-id="{{.ID}}" rel="nofollow">{{svg "octicon-trash"}}</a></span>
 				</div>
 			</div>
 		{{end}}
diff --git a/templates/repo/view_file.tmpl b/templates/repo/view_file.tmpl
index 0c8990a4f5c8d..ba151aefb79fa 100644
--- a/templates/repo/view_file.tmpl
+++ b/templates/repo/view_file.tmpl
@@ -24,7 +24,7 @@
 					{{if .LFSLock}}
 						<div class="file-info-entry ui poping up" data-content="{{.LFSLockHint}}">
 							{{svg "octicon-lock" 16 "mr-2"}}
-							<a href="{{AppSubUrl}}/{{.LFSLock.Owner.Name}}">{{.LFSLockOwner}}</a>
+							<a href="{{AppSubUrl}}/{{.LFSLock.Owner.Name}}" rel="nofollow">{{.LFSLockOwner}}</a>
 						</div>
 					{{end}}
 				</div>
@@ -34,8 +34,8 @@
 		<div class="file-header-right file-actions df ac">
 			{{if .HasSourceRenderedToggle}}
 				<div class="ui compact icon buttons two-toggle-buttons">
-					<a href="{{$.Link}}?display=source" class="ui mini basic button poping up {{if .IsDisplayingSource}}active{{end}}" data-content="{{.i18n.Tr "repo.file_view_source"}}" data-position="bottom center" data-variation="tiny inverted">{{svg "octicon-code" 15}}</a>
-					<a href="{{$.Link}}" class="ui mini basic button poping up {{if .IsDisplayingRendered}}active{{end}}" data-content="{{.i18n.Tr "repo.file_view_rendered"}}" data-position="bottom center" data-variation="tiny inverted">{{svg "octicon-file" 15}}</a>
+					<a href="{{$.Link}}?display=source" class="ui mini basic button poping up {{if .IsDisplayingSource}}active{{end}}" data-content="{{.i18n.Tr "repo.file_view_source"}}" data-position="bottom center" data-variation="tiny inverted" rel="nofollow">{{svg "octicon-code" 15}}</a>
+					<a href="{{$.Link}}" class="ui mini basic button poping up {{if .IsDisplayingRendered}}active{{end}}" data-content="{{.i18n.Tr "repo.file_view_rendered"}}" data-position="bottom center" data-variation="tiny inverted" rel="nofollow">{{svg "octicon-file" 15}}</a>
 				</div>
 			{{end}}
 			<div class="ui buttons mr-2">
@@ -50,12 +50,12 @@
 			</div>
 			{{if .Repository.CanEnableEditor}}
 				{{if .CanEditFile}}
-					<a href="{{.RepoLink}}/_edit/{{EscapePound .BranchName}}/{{EscapePound .TreePath}}"><span class="btn-octicon poping up" data-content="{{.EditFileTooltip}}" data-position="bottom center" data-variation="tiny inverted">{{svg "octicon-pencil"}}</span></a>
+					<a href="{{.RepoLink}}/_edit/{{EscapePound .BranchName}}/{{EscapePound .TreePath}}"><span class="btn-octicon poping up" data-content="{{.EditFileTooltip}}" data-position="bottom center" data-variation="tiny inverted" rel="nofollow">{{svg "octicon-pencil"}}</span></a>
 				{{else}}
 					<span class="btn-octicon poping up disabled" data-content="{{.EditFileTooltip}}" data-position="bottom center" data-variation="tiny inverted">{{svg "octicon-pencil"}}</span>
 				{{end}}
 				{{if .CanDeleteFile}}
-					<a href="{{.RepoLink}}/_delete/{{EscapePound .BranchName}}/{{EscapePound .TreePath}}"><span class="btn-octicon btn-octicon-danger poping up"  data-content="{{.DeleteFileTooltip}}" data-position="bottom center" data-variation="tiny inverted">{{svg "octicon-trash"}}</span></a>
+					<a href="{{.RepoLink}}/_delete/{{EscapePound .BranchName}}/{{EscapePound .TreePath}}"><span class="btn-octicon btn-octicon-danger poping up"  data-content="{{.DeleteFileTooltip}}" data-position="bottom center" data-variation="tiny inverted" rel="nofollow">{{svg "octicon-trash"}}</span></a>
 				{{else}}
 					<span class="btn-octicon poping up disabled" data-content="{{.DeleteFileTooltip}}" data-position="bottom center" data-variation="tiny inverted">{{svg "octicon-trash"}}</span>
 				{{end}}
@@ -84,7 +84,7 @@
 					{{else if .IsPDFFile}}
 						<iframe width="100%" height="600px" src="{{AssetUrlPrefix}}/vendor/plugins/pdfjs/web/viewer.html?file={{EscapePound $.RawFileLink}}"></iframe>
 					{{else}}
-						<a href="{{EscapePound $.RawFileLink}}" rel="nofollow" class="btn btn-gray btn-radius">{{.i18n.Tr "repo.file_view_raw"}}</a>
+						<a href="{{EscapePound $.RawFileLink}}" rel="nofollow" class="btn btn-gray btn-radius" rel="nofollow">{{.i18n.Tr "repo.file_view_raw"}}</a>
 					{{end}}
 				</div>
 			{{else if .FileSize}}
diff --git a/templates/repo/view_list.tmpl b/templates/repo/view_list.tmpl
index 3e7bcbe505a52..7481a960644bf 100644
--- a/templates/repo/view_list.tmpl
+++ b/templates/repo/view_list.tmpl
@@ -8,9 +8,9 @@
 					{{if .LatestCommitUser}}
 						{{avatar .LatestCommitUser 24}}
 						{{if .LatestCommitUser.FullName}}
-							<a href="{{AppSubUrl}}/{{.LatestCommitUser.Name}}"><strong>{{.LatestCommitUser.FullName}}</strong></a>
+							<a href="{{AppSubUrl}}/{{.LatestCommitUser.Name}}" rel="nofollow"><strong>{{.LatestCommitUser.FullName}}</strong></a>
 						{{else}}
-							<a href="{{AppSubUrl}}/{{.LatestCommitUser.Name}}"><strong>{{if .LatestCommit.Author}}{{.LatestCommit.Author.Name}}{{else}}{{.LatestCommitUser.Name}}{{end}}</strong></a>
+							<a href="{{AppSubUrl}}/{{.LatestCommitUser.Name}}" rel="nofollow"><strong>{{if .LatestCommit.Author}}{{.LatestCommit.Author.Name}}{{else}}{{.LatestCommitUser.Name}}{{end}}</strong></a>
 						{{end}}
 					{{else}}
 						{{if .LatestCommit.Author}}
@@ -40,7 +40,7 @@
 	<tbody>
 		{{if .HasParentPath}}
 			<tr class="has-parent">
-				<td colspan="3">{{svg "octicon-reply"}}<a href="{{EscapePound .BranchLink}}{{.ParentPath}}">..</a></td>
+				<td colspan="3">{{svg "octicon-reply"}}<a href="{{EscapePound .BranchLink}}{{.ParentPath}}" rel="nofollow">..</a></td>
 			</tr>
 		{{end}}
 		{{range $item := .Files}}
@@ -54,7 +54,7 @@
 							{{svg "octicon-file-submodule"}}
 							{{$refURL := $subModuleFile.RefURL AppUrl $.Repository.FullName $.SSHDomain}}
 							{{if $refURL}}
-								<a href="{{$refURL}}">{{$entry.Name}}</a><span class="at">@</span><a href="{{$refURL}}/commit/{{$subModuleFile.RefID}}">{{ShortSha $subModuleFile.RefID}}</a>
+								<a href="{{$refURL}}" rel="nofollow">{{$entry.Name}}</a><span class="at">@</span><a href="{{$refURL}}/commit/{{$subModuleFile.RefID}}" rel="nofollow">{{ShortSha $subModuleFile.RefID}}</a>
 							{{else}}
 								{{$entry.Name}}<span class="at">@</span>{{ShortSha $subModuleFile.RefID}}
 							{{end}}
@@ -63,7 +63,7 @@
 								{{$subJumpablePathName := $entry.GetSubJumpablePathName}}
 								{{$subJumpablePath := SubJumpablePath $subJumpablePathName}}
 								{{svg "octicon-file-directory"}}
-								<a href="{{EscapePound $.TreeLink}}/{{EscapePound $subJumpablePathName}}" title="{{$subJumpablePathName}}">
+								<a href="{{EscapePound $.TreeLink}}/{{EscapePound $subJumpablePathName}}" title="{{$subJumpablePathName}}" rel="nofollow">
 									{{if eq (len $subJumpablePath) 2}}
 										<span class="jumpable-path">{{index  $subJumpablePath 0}}</span>{{index  $subJumpablePath 1}}
 									{{else}}
@@ -72,7 +72,7 @@
 								</a>
 							{{else}}
 								{{svg (printf "octicon-%s" (EntryIcon $entry))}}
-								<a href="{{EscapePound $.TreeLink}}/{{EscapePound $entry.Name}}" title="{{$entry.Name}}">{{$entry.Name}}</a>
+								<a href="{{EscapePound $.TreeLink}}/{{EscapePound $entry.Name}}" title="{{$entry.Name}}" rel="nofollow">{{$entry.Name}}</a>
 							{{end}}
 						{{end}}
 					</span>
@@ -80,7 +80,7 @@
 				<td class="message nine wide">
 					<span class="truncate">
 						{{if $commit}}
-							<a href="{{$.RepoLink}}/commit/{{$commit.ID}}" title="{{$commit.Summary}}">{{$commit.Summary | RenderEmoji}}</a>
+							<a href="{{$.RepoLink}}/commit/{{$commit.ID}}" title="{{$commit.Summary}}" rel="nofollow">{{$commit.Summary | RenderEmoji}}</a>
 						{{else}}
 							<div class="ui active tiny slow centered inline">…</div>
 						{{end}}
diff --git a/templates/shared/issuelist.tmpl b/templates/shared/issuelist.tmpl
index 984ddf44737c5..6ed22b94e27e8 100644
--- a/templates/shared/issuelist.tmpl
+++ b/templates/shared/issuelist.tmpl
@@ -133,7 +133,7 @@
 				</div>
 				<div class="issue-item-icon-right text grey">
 					{{if .NumComments}}
-						<a href="{{if .HTMLURL}}{{.HTMLURL}}{{else}}{{$.Link}}/{{.Index}}{{end}}">
+						<a href="{{if .HTMLURL}}{{.HTMLURL}}{{else}}{{$.Link}}/{{.Index}}{{end}}" rel="nofollow">
 							{{svg "octicon-comment" 16 "mr-2"}}{{.NumComments}}
 						</a>
 					{{end}}
diff --git a/templates/user/auth/finalize_openid.tmpl b/templates/user/auth/finalize_openid.tmpl
index 57e9d14ed4e80..7e6f4e63d452d 100644
--- a/templates/user/auth/finalize_openid.tmpl
+++ b/templates/user/auth/finalize_openid.tmpl
@@ -30,12 +30,12 @@
 					<div class="inline field">
 						<label></label>
 						<button class="ui green button">{{.i18n.Tr "sign_in"}}</button>
-						<a href="{{AppSubUrl}}/user/forget_password">{{.i18n.Tr "auth.forget_password"}}</a>
+						<a href="{{AppSubUrl}}/user/forget_password" rel="nofollow">{{.i18n.Tr "auth.forget_password"}}</a>
 					</div>
 					{{if .ShowRegistrationButton}}
 						<div class="inline field">
 							<label></label>
-							<a href="{{AppSubUrl}}/user/sign_up">{{.i18n.Tr "auth.sign_up_now" | Str2html}}</a>
+							<a href="{{AppSubUrl}}/user/sign_up" rel="nofollow">{{.i18n.Tr "auth.sign_up_now" | Str2html}}</a>
 						</div>
 					{{end}}
 					</form>
diff --git a/templates/user/auth/grant.tmpl b/templates/user/auth/grant.tmpl
index 130c2383e78e2..91ee4fa8743d2 100644
--- a/templates/user/auth/grant.tmpl
+++ b/templates/user/auth/grant.tmpl
@@ -24,7 +24,7 @@
 					<input type="hidden" name="nonce" value="{{.Nonce}}">
 					<input type="hidden" name="redirect_uri" value="{{.RedirectURI}}">
 					<input type="submit" id="authorize-app" value="{{.i18n.Tr "auth.authorize_application"}}" class="ui red inline button"/>
-					<a href="{{.RedirectURI}}" class="ui basic primary inline button">Cancel</a>
+					<a href="{{.RedirectURI}}" class="ui basic primary inline button" rel="nofollow">Cancel</a>
 				</form>
 			</div>
 		</div>
diff --git a/templates/user/auth/reset_passwd.tmpl b/templates/user/auth/reset_passwd.tmpl
index 927cf6f5c3b2d..983f1e96a0f96 100644
--- a/templates/user/auth/reset_passwd.tmpl
+++ b/templates/user/auth/reset_passwd.tmpl
@@ -53,7 +53,7 @@
 							<label></label>
 							<button class="ui blue button">{{.i18n.Tr "auth.reset_password_helper"}}</button>
 							{{if and .has_two_factor (not .scratch_code)}}
-								<a href="{{.Link}}?code={{.Code}}&amp;scratch_code=true">{{.i18n.Tr "auth.use_scratch_code" | Str2html}}</a>
+								<a href="{{.Link}}?code={{.Code}}&amp;scratch_code=true" rel="nofollow">{{.i18n.Tr "auth.use_scratch_code" | Str2html}}</a>
 							{{end}}
 						</div>
 					{{else}}
diff --git a/templates/user/auth/signin_inner.tmpl b/templates/user/auth/signin_inner.tmpl
index 20a286aacb71e..2cf52267b1b16 100644
--- a/templates/user/auth/signin_inner.tmpl
+++ b/templates/user/auth/signin_inner.tmpl
@@ -40,13 +40,13 @@
 						{{.i18n.Tr "sign_in"}}
 					{{end}}
 				</button>
-				<a href="{{AppSubUrl}}/user/forgot_password">{{.i18n.Tr "auth.forgot_password"}}</a>
+				<a href="{{AppSubUrl}}/user/forgot_password" rel="nofollow">{{.i18n.Tr "auth.forgot_password"}}</a>
 			</div>
 
 			{{if .ShowRegistrationButton}}
 				<div class="inline field">
 					<label></label>
-					<a href="{{AppSubUrl}}/user/sign_up">{{.i18n.Tr "auth.sign_up_now" | Str2html}}</a>
+					<a href="{{AppSubUrl}}/user/sign_up" rel="nofollow">{{.i18n.Tr "auth.sign_up_now" | Str2html}}</a>
 				</div>
 			{{end}}
 
@@ -59,7 +59,7 @@
 							<p>{{.i18n.Tr "sign_in_with"}}</p>
 							{{range $key := .OrderedOAuth2Names}}
 								{{$provider := index $.OAuth2Providers $key}}
-								<a href="{{AppSubUrl}}/user/oauth2/{{$key}}">
+								<a href="{{AppSubUrl}}/user/oauth2/{{$key}}" rel="nofollow">
 									<img
 										alt="{{$provider.DisplayName}}{{if eq $provider.Name "openidConnect"}} ({{$key}}){{end}}"
 										title="{{$provider.DisplayName}}{{if eq $provider.Name "openidConnect"}} ({{$key}}){{end}}"
diff --git a/templates/user/auth/signup_inner.tmpl b/templates/user/auth/signup_inner.tmpl
index cbfb95e444f93..698805cffcd7f 100644
--- a/templates/user/auth/signup_inner.tmpl
+++ b/templates/user/auth/signup_inner.tmpl
@@ -69,7 +69,7 @@
 				{{if not .LinkAccountMode}}
 				<div class="inline field">
 					<label></label>
-					<a href="{{AppSubUrl}}/user/login">{{.i18n.Tr "auth.register_helper_msg"}}</a>
+					<a href="{{AppSubUrl}}/user/login" rel="nofollow">{{.i18n.Tr "auth.register_helper_msg"}}</a>
 				</div>
 				{{end}}
 			{{end}}
diff --git a/templates/user/auth/signup_openid_connect.tmpl b/templates/user/auth/signup_openid_connect.tmpl
index de97876190deb..8c575750cccba 100644
--- a/templates/user/auth/signup_openid_connect.tmpl
+++ b/templates/user/auth/signup_openid_connect.tmpl
@@ -27,7 +27,7 @@
 					<div class="inline field">
 						<label></label>
 						<button class="ui green button">{{.i18n.Tr "auth.openid_connect_submit"}}</button>
-						<a href="{{AppSubUrl}}/user/forgot_password">{{.i18n.Tr "auth.forgot_password"}}</a>
+						<a href="{{AppSubUrl}}/user/forgot_password" rel="nofollow">{{.i18n.Tr "auth.forgot_password"}}</a>
 					</div>
 					</form>
 				</div>
diff --git a/templates/user/auth/twofa.tmpl b/templates/user/auth/twofa.tmpl
index a9ed66c4316fe..21402910ef746 100644
--- a/templates/user/auth/twofa.tmpl
+++ b/templates/user/auth/twofa.tmpl
@@ -17,7 +17,7 @@
 					<div class="inline field">
 						<label></label>
 						<button class="ui green button">{{.i18n.Tr "auth.verify"}}</button>
-						<a href="{{AppSubUrl}}/user/two_factor/scratch">{{.i18n.Tr "auth.use_scratch_code" | Str2html}}</a>
+						<a href="{{AppSubUrl}}/user/two_factor/scratch" rel="nofollow">{{.i18n.Tr "auth.use_scratch_code" | Str2html}}</a>
 					</div>
 				</div>
 			</form>
diff --git a/templates/user/auth/u2f.tmpl b/templates/user/auth/u2f.tmpl
index 2013d149377d9..d3ea9fd4f43a6 100644
--- a/templates/user/auth/u2f.tmpl
+++ b/templates/user/auth/u2f.tmpl
@@ -13,7 +13,7 @@
 			</div>
 			<div id="wait-for-key" class="ui attached segment"><div class="ui active indeterminate inline loader"></div> {{.i18n.Tr "u2f_press_button"}} </div>
 			<div class="ui attached segment">
-				<a href="{{AppSubUrl}}/user/two_factor">{{.i18n.Tr "u2f_use_twofa"}}</a>
+				<a href="{{AppSubUrl}}/user/two_factor" rel="nofollow">{{.i18n.Tr "u2f_use_twofa"}}</a>
 			</div>
 		</div>
 	</div>
diff --git a/templates/user/dashboard/feeds.tmpl b/templates/user/dashboard/feeds.tmpl
index 83d064dc9529b..082e93d088be8 100644
--- a/templates/user/dashboard/feeds.tmpl
+++ b/templates/user/dashboard/feeds.tmpl
@@ -8,7 +8,7 @@
 				<div class="{{if or (eq .GetOpType 5) (eq .GetOpType 18)}}push news{{end}}">
 					<p>
 						{{if gt .ActUser.ID 0}}
-							<a href="{{AppSubUrl}}/{{.GetActUserName}}" title="{{.GetDisplayNameTitle}}">{{.GetDisplayName}}</a>
+							<a href="{{AppSubUrl}}/{{.GetActUserName}}" title="{{.GetDisplayNameTitle}}" rel="nofollow">{{.GetDisplayName}}</a>
 						{{else}}
 							{{.ShortActUserName}}
 						{{end}}
@@ -99,7 +99,7 @@
 										</span>
 									</li>
 								{{end}}
-								{{if and (gt $push.Len 1) $push.CompareURL}}<li><a href="{{AppSubUrl}}/{{$push.CompareURL}}">{{$.i18n.Tr "action.compare_commits" $push.Len}} »</a></li>{{end}}
+								{{if and (gt $push.Len 1) $push.CompareURL}}<li><a href="{{AppSubUrl}}/{{$push.CompareURL}}" rel="nofollow">{{$.i18n.Tr "action.compare_commits" $push.Len}} »</a></li>{{end}}
 							</ul>
 						</div>
 					{{else if eq .GetOpType 6}}
diff --git a/templates/user/dashboard/milestones.tmpl b/templates/user/dashboard/milestones.tmpl
index c7416e7cd7b94..877be693460ca 100644
--- a/templates/user/dashboard/milestones.tmpl
+++ b/templates/user/dashboard/milestones.tmpl
@@ -81,7 +81,7 @@
 					{{range .Milestones}}
 						<li class="item">
 							<div class="ui label">{{.Repo.FullName}}</div>
-							{{svg "octicon-milestone"}} <a href="{{.Repo.Link }}/milestone/{{.ID}}">{{.Name}}</a>
+							{{svg "octicon-milestone"}} <a href="{{.Repo.Link }}/milestone/{{.ID}}" rel="nofollow">{{.Name}}</a>
 							<div class="ui right green progress" data-percent="{{.Completeness}}">
 								<div class="bar" {{if not .Completeness}}style="background-color: transparent"{{end}}>
 									<div class="progress"></div>
@@ -107,13 +107,13 @@
 							</div>
 							{{if and (or $.CanWriteIssues $.CanWritePulls) (not $.Repository.IsArchived)}}
 								<div class="ui right operate">
-									<a href="{{$.Link}}/{{.ID}}/edit" data-id={{.ID}} data-title={{.Name}}>{{svg "octicon-pencil"}} {{$.i18n.Tr "repo.issues.label_edit"}}</a>
+									<a href="{{$.Link}}/{{.ID}}/edit" data-id={{.ID}} data-title={{.Name}} rel="nofollow">{{svg "octicon-pencil"}} {{$.i18n.Tr "repo.issues.label_edit"}}</a>
 									{{if .IsClosed}}
-										<a href="{{$.Link}}/{{.ID}}/open" data-id={{.ID}} data-title={{.Name}}>{{svg "octicon-check"}} {{$.i18n.Tr "repo.milestones.open"}}</a>
+										<a href="{{$.Link}}/{{.ID}}/open" data-id={{.ID}} data-title={{.Name}} rel="nofollow">{{svg "octicon-check"}} {{$.i18n.Tr "repo.milestones.open"}}</a>
 									{{else}}
-										<a href="{{$.Link}}/{{.ID}}/close" data-id={{.ID}} data-title={{.Name}}>{{svg "octicon-x"}} {{$.i18n.Tr "repo.milestones.close"}}</a>
+										<a href="{{$.Link}}/{{.ID}}/close" data-id={{.ID}} data-title={{.Name}} rel="nofollow">{{svg "octicon-x"}} {{$.i18n.Tr "repo.milestones.close"}}</a>
 									{{end}}
-									<a class="delete-button" href="#" data-url="{{$.RepoLink}}/milestones/delete" data-id="{{.ID}}">{{svg "octicon-trash"}} {{$.i18n.Tr "repo.issues.label_delete"}}</a>
+									<a class="delete-button" href="#" data-url="{{$.RepoLink}}/milestones/delete" data-id="{{.ID}}" rel="nofollow">{{svg "octicon-trash"}} {{$.i18n.Tr "repo.issues.label_delete"}}</a>
 								</div>
 							{{end}}
 							{{if .Content}}
diff --git a/templates/user/notification/notification_div.tmpl b/templates/user/notification/notification_div.tmpl
index 8976e1fda4a00..fa3b15b64417f 100644
--- a/templates/user/notification/notification_div.tmpl
+++ b/templates/user/notification/notification_div.tmpl
@@ -3,11 +3,11 @@
 		<h1 class="ui dividing header">{{.i18n.Tr "notification.notifications"}}</h1>
 		<div class="ui top attached tabular menu">
 			{{ $notificationUnreadCount := call .NotificationUnreadCount}}
-			<a href="{{AppSubUrl}}/notifications?q=unread" class="{{if eq .Status 1}}active{{end}} item">
+			<a href="{{AppSubUrl}}/notifications?q=unread" class="{{if eq .Status 1}}active{{end}} item" rel="nofollow">
 				{{.i18n.Tr "notification.unread"}}
 				<div class="ui label {{if not $notificationUnreadCount}}hidden{{end}}">{{$notificationUnreadCount}}</div>
 			</a>
-			<a href="{{AppSubUrl}}/notifications?q=read" class="{{if eq .Status 2}}active{{end}} item">
+			<a href="{{AppSubUrl}}/notifications?q=read" class="{{if eq .Status 2}}active{{end}} item" rel="nofollow">
 				{{.i18n.Tr "notification.read"}}
 			</a>
 			{{if and (eq .Status 1)}}
diff --git a/templates/user/settings/account.tmpl b/templates/user/settings/account.tmpl
index 5be3d5dc51807..69ed2ac12bad5 100644
--- a/templates/user/settings/account.tmpl
+++ b/templates/user/settings/account.tmpl
@@ -27,7 +27,7 @@
 
 				<div class="field">
 					<button class="ui green button">{{$.i18n.Tr "settings.change_password"}}</button>
-					<a href="{{AppSubUrl}}/user/forgot_password?email={{.Email}}">{{.i18n.Tr "auth.forgot_password"}}</a>
+					<a href="{{AppSubUrl}}/user/forgot_password?email={{.Email}}" rel="nofollow">{{.i18n.Tr "auth.forgot_password"}}</a>
 				</div>
 			</form>
 			{{else}}
@@ -188,7 +188,7 @@
 					<div class="ui red button delete-button" data-modal-id="delete-account" data-type="form" data-form="#delete-form">
 						{{.i18n.Tr "settings.confirm_delete_account"}}
 					</div>
-					<a href="{{AppSubUrl}}/user/forgot_password?email={{.Email}}">{{.i18n.Tr "auth.forgot_password"}}</a>
+					<a href="{{AppSubUrl}}/user/forgot_password?email={{.Email}}" rel="nofollow">{{.i18n.Tr "auth.forgot_password"}}</a>
 				</div>
 			</form>
 		</div>
diff --git a/templates/user/settings/applications_oauth2.tmpl b/templates/user/settings/applications_oauth2.tmpl
index 8218674bce611..c912f56db6152 100644
--- a/templates/user/settings/applications_oauth2.tmpl
+++ b/templates/user/settings/applications_oauth2.tmpl
@@ -9,7 +9,7 @@
 		{{range $app := .Applications}}
 			<div class="item">
 				<div class="right floated content">
-					<a href="{{$.Link}}/oauth2/{{$app.ID}}" class="ui primary tiny button">
+					<a href="{{$.Link}}/oauth2/{{$app.ID}}" class="ui primary tiny button" rel="nofollow">
 						{{svg "octicon-pencil" 16 "mr-2"}}
 						{{$.i18n.Tr "settings.oauth2_application_edit"}}
 					</a>
diff --git a/templates/user/settings/applications_oauth2_edit.tmpl b/templates/user/settings/applications_oauth2_edit.tmpl
index 1f8c7f756e74a..16d69354a9b77 100644
--- a/templates/user/settings/applications_oauth2_edit.tmpl
+++ b/templates/user/settings/applications_oauth2_edit.tmpl
@@ -31,7 +31,7 @@
 				{{.i18n.Tr "settings.oauth2_regenerate_secret_hint"}}
 				<form class="ui form ignore-dirty" action="{{AppSubUrl}}/user/settings/applications/oauth2/{{.App.ID}}/regenerate_secret" method="post">
 					{{.CsrfTokenHtml}}
-					<a href="#" onclick="event.target.parentNode.submit()">{{.i18n.Tr "settings.oauth2_regenerate_secret"}}</a>
+					<a href="#" onclick="event.target.parentNode.submit()" rel="nofollow">{{.i18n.Tr "settings.oauth2_regenerate_secret"}}</a>
 				</form>
 			</div>
 		</div>
diff --git a/templates/user/settings/repos.tmpl b/templates/user/settings/repos.tmpl
index b82f131b205ae..0bd647cf0660c 100644
--- a/templates/user/settings/repos.tmpl
+++ b/templates/user/settings/repos.tmpl
@@ -30,7 +30,7 @@
 										<span>{{SizeFmt $repo.Size}}</span>
 										{{if $repo.IsFork}}
 											{{$.i18n.Tr "repo.forked_from"}}
-											<span><a href="{{AppSubUrl}}/{{$repo.BaseRepo.OwnerName}}/{{$repo.BaseRepo.Name}}">{{$repo.BaseRepo.OwnerName}}/{{$repo.BaseRepo.Name}}</a></span>
+											<span><a href="{{AppSubUrl}}/{{$repo.BaseRepo.OwnerName}}/{{$repo.BaseRepo.Name}}" rel="nofollow">{{$repo.BaseRepo.OwnerName}}/{{$repo.BaseRepo.Name}}</a></span>
 										{{end}}
 									{{else}}
 										<span class="icon">{{svg "octicon-file-directory"}}</span>
@@ -123,7 +123,7 @@
 									<span>{{SizeFmt .Size}}</span>
 									{{if .IsFork}}
 										{{$.i18n.Tr "repo.forked_from"}}
-										<span><a href="{{AppSubUrl}}/{{.BaseRepo.OwnerName}}/{{.BaseRepo.Name}}">{{.BaseRepo.OwnerName}}/{{.BaseRepo.Name}}</a></span>
+										<span><a href="{{AppSubUrl}}/{{.BaseRepo.OwnerName}}/{{.BaseRepo.Name}}" rel="nofollow">{{.BaseRepo.OwnerName}}/{{.BaseRepo.Name}}</a></span>
 									{{end}}
 								</div>
 							</div>
diff --git a/web_src/fomantic/build/semantic.js b/web_src/fomantic/build/semantic.js
index 2d5b7d82029cb..1020389e720d4 100644
--- a/web_src/fomantic/build/semantic.js
+++ b/web_src/fomantic/build/semantic.js
@@ -14476,7 +14476,7 @@ $.fn.search.settings = {
             + '</div>';
           } else {
             html += ''
-            + '<a href="' + response[fields.action][fields.actionURL].replace(/"/g,"") + '" class="action">'
+            + '<a href="' + response[fields.action][fields.actionURL].replace(/"/g,"") + '"rel="nofollow" class="action">'
             +   escape(response[fields.action][fields.actionText], preserveHTML)
             + '</a>';
           }
@@ -14530,7 +14530,7 @@ $.fn.search.settings = {
             + '</div>';
           } else {
             html += ''
-            + '<a href="' + response[fields.action][fields.actionURL].replace(/"/g,"") + '" class="action">'
+            + '<a href="' + response[fields.action][fields.actionURL].replace(/"/g,"") + '"rel="nofollow" class="action">'
             +   escape(response[fields.action][fields.actionText], preserveHTML)
             + '</a>';
           }
diff --git a/web_src/js/features/repo-editor.js b/web_src/js/features/repo-editor.js
index 831b621fde84a..ca68dabcb743e 100644
--- a/web_src/js/features/repo-editor.js
+++ b/web_src/js/features/repo-editor.js
@@ -109,7 +109,7 @@ export async function initRepoEditor() {
         value = parts[i];
         if (i < parts.length - 1) {
           if (value.length) {
-            $(`<span class="section"><a href="#">${value}</a></span>`).insertBefore($(this));
+            $(`<span class="section"><a href="#" rel="nofollow">${value}</a></span>`).insertBefore($(this));
             $('<div class="divider"> / </div>').insertBefore($(this));
           }
         } else {