No its on a different server (LAN). And it worked perfectly before the move to the new apartment.
EDIT:
I saw that i had made the portforward wrong. instead of 10011 ive added 1001.
So now it seems to find the server at least. But now im getting a new error.
2018-07-07 11:16:13 JTS3ServerMod INFO Successful connected to 192.168.1.23!
2018-07-07 11:16:13 JTS3ServerMod INFO Login as "xxxxxx" successful!
2018-07-07 11:16:13 JTS3ServerMod INFO Successful selected virtual server on port 9987!
2018-07-07 11:16:13 JTS3ServerMod ERROR Unable to receive channel chat messages!
2018-07-07 11:16:13 JTS3ServerMod EXCEPTION de.stefan1200.jts3serverquery.TS3ServerQueryException: ServerQuery Error 3331: flood ban
2018-07-07 11:16:13 JTS3ServerMod ERROR Unable to receive private chat messages!
2018-07-07 11:16:13 JTS3ServerMod EXCEPTION java.lang.IllegalStateException: null object, maybe connection to TS3 server interrupted.
2018-07-07 11:16:13 JTS3ServerMod ERROR Unable to receive server chat messages!
2018-07-07 11:16:13 JTS3ServerMod EXCEPTION java.lang.IllegalStateException: Not connected to TS3 server!
2018-07-07 11:16:13 JTS3ServerMod ERROR Error while getting channel list!
2018-07-07 11:16:13 JTS3ServerMod EXCEPTION java.lang.IllegalStateException: Not connected to TS3 server!
How to solve that? Never had problems with "flood bans" earlier.
EDIT 2:
i just remembered that i forgot to add the new IP in the whitelist. I did that now and waiting a couple of minutes for it to populate. Then i try again and see if it works. But it should..
EDIT 3: seems like im back at the first error message
2018-07-07 11:23:53 JTS3ServerMod CRITICAL Unable to connect to Teamspeak 3 server at 192.168.1.23!
2018-07-07 11:23:53 JTS3ServerMod EXCEPTION java.lang.IllegalStateException: Server does not respond as TS3 server!
EDIT 4 (and hopefully last edit):
i was just to eager to wait. After waiting a couple of more minutes it seems to work.