[devicenull]

Onto the server plugin:
Extract it to \addons\
Install it like a normal plugin.
You need to set two cvars:
banlist_update .. The number of hours between updates.
banlist_url .. The url to the update script. This is the path to getupdates.php in the plugin script.

And thats it.. everything should work from there. The plugin keeps track of it's bans internally.. anyone who joins and is on it's list will be banned for an hour. This prevents it from spamming the server's banlist.