/SLASHPLAY
How to ban an IP on a CS:S server
Type banip 0 203.0.113.50 in the server console to ban that IP permanently, then writeip to save it to banned_ip.cfg.
banip
Bans an IP address for a number of minutes, 0 for permanent.
banip <minutes> <ip> Examples
banip 0 203.0.113.50 Permanent IP ban.
Arguments
minutesRequired- Ban length, 0 for permanent.
ipRequired- IP address.
What it does
Run writeip to save it to banned_ip.cfg.
The game's own description: Add an IP address to the ban list.
Run it on your server
On a SLASHPLAY server, type it in the Console tab of the server page; the reply shows right under it. A value set there lasts until the server restarts. To keep it, add the line to cstrike/cfg/server.cfg. New to this? Start a CS:S server first.
Your own
CS:S server.
From $0.03 an hour, only while it runs. New accounts get 6 free tokens.