Tests OK with wrong reverse proxy configuration

[mxbode]

Hey,
I had an bad issue, that federation wasn't possible anymore. Logs where showing likely "server key is invalid or corrupt" and request thats ended in a 404 to my partners server .well-known route.

Federation tester was still saying thats all okay on both servers. Turns out it was an tailing slash at the end of my proxy_pass on my nginx server config, that doesnt belong there:

wrong: proxy_pass http://localhost:8008/;
right: proxy_pass http://localhost:8008;

Sadly that happend on a migration from apache. Maybe its possible to check and recognize a misconfiguration like this one. A false-positive check result makes debugging hard.

73