Login server

There are 8 login servers available in RuneScape when players initially sign on. During login server maintenance there will be a 1/8 chance that a player would not be able to signon. Assignments to which login server is random. A family with different players from the same IP address may have some of their members being able to signon with other family members not able to play.

Reference

 * RuneScape Forums > Tech Support > Login Server Maintenance accessed 8 January 2008