[C0nw0nk]

Originally Posted by nomy Using Windows Server 2008 R2 SP1 x64. Its definitely some sort of flood. As soon as I restarted server it continued. I had to stop the server for sometime and check if the spam had stopped. It eventually stopped. I called it DDoS because I saw multiple server IPs in that console spam i think most were cs1.6 servers from Russia. Of course IPs can be spoofed under UDP packets. I don't have a hardware firewall, it costs too much to setup from datacenter and not planing for one either.

Then yes you are definitely under a form of DDoS I also cross referenced the IP addresses in your log they are infact other game servers Have you instaled any of the recommended plugins ?

Originally Posted by C0nw0nk Stage 4 : Recommended plugins / Addons to fight hackers, laggers and malicious people who connect to your server : Drunken_F00l's | DAF (Dos Attack Fixer) Blocks exploits with specific "A2S" Packets in SRCDS. http://www.sourceop.com/modules.php?...p=getit&lid=37 asherkin | ServerSecure (Files only) - Server protection against the Upload / Download exploit. http://forums.alliedmods.net/showthread.php?t=142249 GoD-Tony | SourceMod Anti-Cheat - Prevents Hackers scripters spammers and cheaters. http://forums.alliedmods.net/showthread.php?p=1637640 Liam | HPK High Ping Kicker Lite Edition - Enforce a maximum ping upon players to prevent server lag. http://forums.alliedmods.net/showthread.php?p=701420 devicenull | Rcon Locker / Exploit Fixer (only works with "rcon_password" enabled) http://forums.alliedmods.net/showthread.php?p=841590 Forlix | Flood Checker - Prevents flooding / spamming of console chat and the server itself. http://forums.alliedmods.net/showthread.php?p=779851 Dr. McKay | How to get -autoupdate to work on Windows (Keeping your srcds server up to date) http://forums.alliedmods.net/showthread.php?t=173487 KyleS | Create Edict Fixer http://forums.alliedmods.net/showthread.php?t=186830 Query Caching protecting the server from A2S_INFO DoS attacks Metamod version (ivailosp) | http://forums.alliedmods.net/showthread.php?t=135543 Sourcemod version (Zephyrus) | http://forums.alliedmods.net/showpos...&postcount=110

If you instal some of them especialy the DoS fixers it could help decrease the potential impact of the attack the other thing is to follow the windows firewall settings and block all the packet types you are not using other than TCP and UDP, As shown in Stage 1, Step 3.

You can also download the .zip file i added what has some tools init for your windows registry to prevent flooding of packet types.