[BcY]

If you're hosting your server on a Linux distribution apply this iptables setting:

Code:

iptables -A INPUT -p udp -m length --length 0:28 -j DROP

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1- Set your remote control(rcon) password to be able to manage your server as an administrator.

Code:

sv_rcon desiredrconpasswordhere

2- Limit rcon usage to certain users.

Code:

sv_rconusers usgn1,usgn2,usgn3,steamid1,steamid2

3 - Limit rcon fails.

Code:

mp_maxrconfails 1

4 - Limit connections per IP.

Code:

mp_maxclientsip 2

5 - Enable flood protection.

Code:

mp_floodprot 1

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For more informations check:
http://www.cs2d.com/help.php?cat=securit...odprot#cmd
http://www.cs2d.com/security.php