Any time i try connecting to my linux os it gives me “Connection blocked or not available”(something among those lines). It worked flawlessly just yesterday, but today was no success. I have 2 connections available: 192.168.0.123 and 192.168… They show on android application and on my linux computer. I am using the .tar.gz version. I have bought premium version if that matters. The post with same topic was no use. Any help appreciated. I can provide any information needed.
Either incoming connections to your PC are blocked or the port 59100 is somehow no longer available… 
Could you please provide the logs found in the server’s settings? It’ll show whether the port is not usable.
Does it work again after a restart?
Could it be due to a firewall? (you could temporarily deactivate it just to test)
Okay first of all thanks for help and second of all it is indeed blocked by firewall. After i stopped firewall, it magically worked. I fixed it by adding 59100 tcp and 59200 udp ports on firewall configuration(59100 udp was only port opened).