The Brink Standalone Dedicated Server includes several different game configuration files covering all of the regular game modes, including campaign, stopwatch, objective, and co-*-op challenges. In addition, there are a variety of server-*-side commands available that allow you to further customize your server, including team sizes, time limits and overtime, warm-*-up rules, friendly fire, voice chat, availability of Command Post buffs, rank restrictions, number of bots, and password.
Unfortunately for Australians, Brink is now $90 on Steam. You'll either have to grab a US VPN trial account to acquire a $50 copy, or sweet-talk Milenko to organise a gift on the forums.
For those not entirely familiar with how multiplayer is expected to play, especially those who have had no previous Enemy Territory experience, have a gawk at this gameplay tutorial for the heads-up: