Strange Attack / Exploit

[Spency]

Alright so I've been getting what seems to be some kind of attack today, it's never happened before. I've been DDoSed plenty of times, and it's usually easy enough to block or figure out a pattern with the packets, and it never spams this NET_GetLong shit in the console. This only happens for a few seconds, and the server crashes almost instantly. I've searched around, and I can't find any type of definite solution.

Just before it crashes, this is printed in the console



Any ideas of what I can do?

Specs
Server OS: Windows Server 2008
Processor: Xeon E3-1320V2
Ram: 8GB ram
Game(s): Garry's Mod
Start Up Command: Standard
Admin Mods: Not Relevant

[Sakretsos]

try to setup the windows firewall... this is the only thing that you can do ... on linux you have plenty ideas to setup firewall.. but on windows.. try the windows firewall !

also... the srcds ports :

http://www.freenerd.net/index.php?title=IPTABLES_for_SRCDS