diff --git a/spec/type_aliases/port__dynamic_spec.rb b/spec/type_aliases/port__dynamic_spec.rb
new file mode 100644
index 000000000..5503e7c0d
--- /dev/null
+++ b/spec/type_aliases/port__dynamic_spec.rb
@@ -0,0 +1,43 @@
+require 'spec_helper'
+
+if Puppet::Util::Package.versioncmp(Puppet.version, '4.5.0') >= 0
+  describe 'Stdlib::Port::Ephemeral' do
+    describe 'valid ephemeral port' do
+      [
+        49_152,
+        51_337,
+        65_000,
+      ].each do |value|
+        describe value.inspect do
+          it { is_expected.to allow_value(value) }
+        end
+      end
+    end
+
+    describe 'invalid path handling' do
+      context 'garbage inputs' do
+        [
+          nil,
+          [nil],
+          [nil, nil],
+          { 'foo' => 'bar' },
+          {},
+          '',
+          'https',
+          '443',
+          -1,
+          80,
+          443,
+          1023,
+          1337,
+          8080,
+          28_080,
+        ].each do |value|
+          describe value.inspect do
+            it { is_expected.not_to allow_value(value) }
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/type_aliases/port__user_spec.rb b/spec/type_aliases/port__user_spec.rb
new file mode 100644
index 000000000..c34e9b227
--- /dev/null
+++ b/spec/type_aliases/port__user_spec.rb
@@ -0,0 +1,41 @@
+require 'spec_helper'
+
+if Puppet::Util::Package.versioncmp(Puppet.version, '4.5.0') >= 0
+  describe 'Stdlib::Port::User' do
+    describe 'valid user' do
+      [
+        1024,
+        1337,
+        49_151,
+      ].each do |value|
+        describe value.inspect do
+          it { is_expected.to allow_value(value) }
+        end
+      end
+    end
+
+    describe 'invalid path handling' do
+      context 'garbage inputs' do
+        [
+          nil,
+          [nil],
+          [nil, nil],
+          { 'foo' => 'bar' },
+          {},
+          '',
+          'https',
+          '443',
+          -1,
+          80,
+          443,
+          1023,
+          49_152,
+        ].each do |value|
+          describe value.inspect do
+            it { is_expected.not_to allow_value(value) }
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/types/port/dynamic.pp b/types/port/dynamic.pp
new file mode 100644
index 000000000..5e67a868d
--- /dev/null
+++ b/types/port/dynamic.pp
@@ -0,0 +1 @@
+type Stdlib::Port::Dynamic = Integer[49152, 65535]
diff --git a/types/port/ephemeral.pp b/types/port/ephemeral.pp
new file mode 100644
index 000000000..a0dd633ce
--- /dev/null
+++ b/types/port/ephemeral.pp
@@ -0,0 +1 @@
+type Stdlib::Port::Ephemeral = Stdlib::Port::Dynamic
diff --git a/types/port/registered.pp b/types/port/registered.pp
new file mode 100644
index 000000000..cbbf80744
--- /dev/null
+++ b/types/port/registered.pp
@@ -0,0 +1 @@
+type Stdlib::Port::Registered = Stdlib::Port::User
diff --git a/types/port/user.pp b/types/port/user.pp
new file mode 100644
index 000000000..01b82cb46
--- /dev/null
+++ b/types/port/user.pp
@@ -0,0 +1 @@
+type Stdlib::Port::User = Integer[1024, 49151]