On our project, fortress capture mechanics have been reworked.

A fortress is now owned by a player, not a clan. Fortress bonuses go only to the player who capped it. All fortress bonuses have been changed (check the map, or see the list below). Clanmates of the fortress owner can still use fortress features (dungeon, merchants, etc.), except teleport scrolls and respawn in the fortress.

• Any char with Noble status or higher can start a fortress siege if they’re not in the same clan as the owner, by paying 1kkk Adena to the Suspicious Merchant walking around the fortress;
• The fortress owner and their clanmates can’t use resurrection skills in the fortress siege zone if the Support Barracks are destroyed;
• Everyone else can’t use resurrection skills in the fortress siege zone if the Support Barracks are NOT destroyed;
• Password pickup for Machine Barracks now works for all classes the same way as for crafters;
• Any char can capture the fortress (no matter who started the siege), as long as they’re not in the same clan as the owner;
• To capture a fortress you need to break all barracks and kill the NPCs near the flagpole, then use the Seize Fortress skill (given to all chars who completed the Noble quest).