Syncthing reverse proxy - 500 Internal server error



Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at [no address given] to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.

I can get to syncthing webui using the ipaddress and corresponding port or using a ssh tunnel but that’s pretty much the same thing. I also didnt find anything relevant in /var/log/apache2/error.log


I just installed syncthing for the first time(just to test your issue) on quickbox and I didnt have this issue. I was able to go to https://server/syncthing and didnt have any issues. I got the normal synthing config menu where I selected a folder to sync, etc.

I wonder if its an issue with having syncthing configured before the switch?


Just tried uninstalling/reinstalling syncthing. As well as deleting the syncthing folder located in ~/.config. Now getting connection refused when using as well as when trying https://myipaddress:8384. SSH tunnel to 8384 still works though.

Just to confirm default syncthing listening address is localhost:8384 correct? That is what shows up when I go to the WEBUI settings console.

systemctl status [email protected] shows
hostname:/home/username/.config# rm -rf syncthing/
hostname:/home/username/.config# installpackage-syncthing
hostname:/home/username/.config# systemctl status [email protected]
[email protected] - Syncthing - Open Source Continuous File Synchronization for username
Loaded: loaded (/etc/systemd/system/[email protected]; enabled; vendor preset: enabled)
Active: active (running) since Sat 2016-10-08 22:26:55 CEST; 11s ago
Docs: man:syncthing(1)
Main PID: 27404 (syncthing)
CGroup: /system.slice/system-syncthing.slice/[email protected]
└─27404 /usr/bin/syncthing -no-browser -no-restart -logflags=0

Oct 08 22:26:56 hostname syncthing[27404]: [AKYDC] INFO: GUI and API listening on


the only problem i had was after purging it and reinstalling it, was that if you set a password or change any major settings that mess with the apache authentication it will kill the gui but program stays running.


Thanks! Reverse proxy link is working from the quickbox dashboard.I did not test functionality beyond this though.

I did the following:

apt-get purge syncthing
apt autoremove (not sure if this was necessary, but I did it anyway)
rm -rf ~/.config/syncthing/