Particular port inaccesible

[MIKI785]

Hello,

I've got a problem with one of my servers, one particular server just isn't responding and it's impossible to connect to it (request times out) although all the other servers run fine. The UDP port isn't blocked in any way (it's open) and I didn't change any configurations, it just stopped working. I even tried restarting the whole VPS but it didn't help in any way.

What is the issue then?

I'm using Linux Debian 7

[ccw]

What is the server ip/port?

(Make sure it is running so we can do some tests)

[MIKI785]

mshost.cz:22014

[ccw]

Connecting to 22014 works, but it is the same server as 22015, which is strange.

What Linux OS are using using?

Show me the output of these Linux commands:

iptables -L 
iptables -t nat -L 
netstat -u -n -l 

[MIKI785]

22015 is the same server just on different port (temporarily), it's not strange as I forwarded everything coming to 22014 to 22015 (that didn't work as the port didnt work), i did that in case anyone tried to connect to it when it started working so there wouldnt be 2 servers, it started working now so it's resolved I guess, just started working again out of nowhere.