Ubuntu 24.04 - "Is this a ThinLinc server?" - ThinLinc client only

[jamesfreeman959]

Hi all

I’m currently upgrading some of my development machines to Ubuntu 24.04 to start testing and gaining experience in it. I’ve installed ThinLinc 4.16 server on one machine, and the Web UI (on port 300) works just fine.

However when I try and connect using the ThinLinc client (using SSH on port 22), I get an error saying the connection was refused and asking “Is this a ThinLinc server?”. SSH itself works just fine - I have a working terminal open.

Are there any known issues or changes around the way Ubuntu 24.04 works? Any logs or other information I can submit to help?

Many thanks

James

[martin]

Hello @jamesfreeman959

Please have a look at the following topics, perhaps those can help you forward?

Tlclient says "server refused connection. is this a tl server?" but admintool has session entry?

I’m trying to connect to my tlserver, the tlclient tries to connect and then displays the error message “Server refused the connection. Is this a ThinLinc server?”. When opening the webadministration under status > sessions an entry for the user is present, disconnected but still there. What could be the cause of this? How do I solve this? Edit: In /var/log/vsmserver.log I get the entries: User with uid <uid> (<name>) requested a new session Session 127.0.0.1:10 created for user <name> So …

"Is this a thinlinc server?" error message despite running vsmserver & possible ssh connection?

When trying to connect to the server running the vsmserver I always get the error message “Server refused the connection. Is this a ThinLinc server?”. I can connect to the server via ssh without a problem. systemctl status vsmserver.service also shows, that the vsmserver is active and running. Even weirder are the logs, here the last entrys of /var/log/vsmserver.log: 2021-06-21 06:48:09 INFO vsmserver.session: User with uid 1002 requested a reconnection to 127.0.0.1:10 2021-06-21 06:48:09 IN…

Regards,
Martin

[jamesfreeman959]

Thanks Martin! Not my finest moment - the moral here is, if you’re playing with the HOST_ALIASES parameter in ~/.thinlinc/tlclient.conf, remember to remove them when you’re done testing. The server was working fine - issue was entirely on the client end - tcpdump to the rescue in my case!