Iban's Trench CTF. Kaje's Sniper Rifle, Ephi's Shotgun, the default Gun, and your trench dirt and shovel tools.
I remember it was the size of about two 64by64's. There were two side-paths and in the middle was a poorly build wooden bridge with lava below it. I also remember that I dug to the bottom of the map, tunneled for like an hour, and when I almost made it to the other base, Iban reset the map. It was extremely fun, though.
There aren't servers like these anymore. It's weird how back then lots of people enjoyed it, but if someone were to recreate it, use the classic weapons, and host it, nobody would show up and nobody would like it. People would complain about how small it is and how bad the guns are. Man, so much nostalgia when thinking about this server.
I actually might try remaking the build he made...