Unified mod pack: http://www.technicpack.net/modpack/tyrants-plebeians-unified.900430
This website is the official site for the Tyrants and Plebeians mod packs. The goal of Tyrants and Plebeians is to use Flan's Mod in order to cold-heartedly misuse Minecraft for tasks it was not meant to accomplish.
The TDM server uses Flan's mod's built-in "Team's mod" to run team-based multiplayer carnage across various scenarios like random World War 2 battles, crappy Team Fortress 2 simulations, and Illuminati invasions.
The survival server is temporarily closed off to the general public until unified mod pack is released
The survival server is similar to a generic PVP factions war server, except it has an integrated tier system and hundreds of guns and vehicles to choose from that are all at least somewhat balanced in regard to gameplay.
For both modpacks, you do not need the server ip. Just install the modpack properly and click the multiplayer button to join the server.