"Cannot find homeserver" using riot-web

[r4dh4l]

Trying to join #matrix:matrix.org my home server (as far as I know that is a common problem for very large rooms), that's why I ask for help here.

Description

Recently I noticed that I can not use https://riot.im/app/ with my homeserver accounts. The Web-App reports

Cannot find homeserver

Using my homeserver with Riot-Destop/iOS/Android works just fine and even riot.im/app/ worked fine in the past.

Steps to reproduce

1. I open https://riot.im/app/ -> log in
2. I provide my MXID @user:my.ddns.net and password
3. I provide my homeserver under "Custom server": https://my.ddns.net:8448

Riot-Web reports "Cannot find homeserver". The same is the case when I try, for example, https://matrix.bau-ha.us/#/home so it seems not to be related to a certain riot-web server.

Because using riot-web servers with my homeserver was no problem in the past I wonder if there was a recent change not accepting homeservers anymore that use port 8448 for client connection? I know it is reommended to use a Reverse Proxy but for some setups it is very useful to use port 8448 (in my case: running a homeserver really at home with only one public IP address via dynamic DNS and providing a data cloud service as well that already uses port 443).

Version information

• Homeserver:

If not matrix.org: See "Steps to reproduce".

• Version: Synapse/0.33.9

• Install method: pip

• Platform:

r4dh4l@vm-synapse:~$ uname -a
Linux vm-synapse 4.9.0-8-amd64 #1 SMP Debian 4.9.130-2 (2018-10-27) x86_64 GNU/Linux
r4dh4l@vm-synapse:~$ cat /etc/debian_version 
9.6

The VM has 2GB RAM and one CPU.

I've already posted this in Synapse issues tracker and was redirected here.

[Half-Shot]

EDIT: Ignore this, I was testing the default homeserver but not yours.

Hiya, I tested trying to log in (bogus credentials, but selecting your server) with your own instance of Riot (https://matrix.bau-ha.us/#/home) and it actually did fail to authenticate, which means it definitely found your homeserver.

It's not possible this was just a networking issue?

[Half-Shot]

Okay, this time I tried the homeserver you gave in the report and it did the same as above:

This could be an issue with your local connection / server? I seem to be able to connect fine :(

[uhoreg]

This is probably #7875

[lampholder]

Yep, pretty certain this is a dup of #7875.

We are actively looking for a solution to this - I'll close this issue so that there's one clear issue on which to track progress (but I'll make a note on 7875 that there's potentially some useful stuff on here)

[r4dh4l]

Thx all for your support!