I remove all sessions with db.sessions.remove({}) but now i can't logged in (403 Forbidden) also when i restart nodebb ?? but cookie domain was .domain.com now one step forward, one step backward. Edit : loggin with Firefox works but not with chrome. ReEdit : sorry clear cache solve it. So now i have the same cookie (.domain.com) in chrome debugger at forum.domain.com and app.domain.com. Thank you very much.