Everyday my server disappear in serverlist,but dedicated server NOT any ERROR ,I have to restart dedicated server so Its normal show in serverlist ,but during this period, the server must restart almost every day.whats wrong in USGN?

my server:
116.62.12.19:36963-CS2DCN.com | FUN
116.62.12.19:36964-CS2DCN.com | Crazy Jail

I have seen that the servers of the FISURAMA community disappear from one moment to another from the list, but that they are still online if you enter from the IP address!

It is something very rare that I have never seen before.

DDoS attacks 100%

Mami Tomoe It has nothing to do with DDoS attacks, i think it is a cs2d problem in general

@ CyJ: talking from experience.

Don't you use any script that automatically puts your server into LAN without you being aware of? Or probably someone put it into LAN via RCON.

Setup your firewall rules right or just simply deactivate it.

@ CyJ: I agree with you

Please observe if your server is still in
http://www.unrealsoftware.de/usgn.php?s=cs2d

If it's gone there even though your server is up and running all the time then it's probably a problem with the U.S.G.N. and I have to investigate t hat case.

If it's still there then it's maybe some sort of weird connectivity problem on your end.

You can also observe the logs of your server. There should be something like

when the server is added to the list (means: it wasn't in before)
and also something like

when the entry was updated (it already was in the list).

The updating happens every 45 seconds.
It's a heart beat system. If your server stops sending these heart beats it will be removed from the list after 3 minutes because the U.S.G.N. assumes its offline.

@ DC: Thank you sir, I will check it