Can anyone please tell me if there is a way to limit the number of concurement connection from guests ona particukar vBulletin or IPB based
forum ?

If there is none then maybe i can limit the number of connections with Apache Mod_limitipconn and mod_bandwidth but then will it overload the server ?
I mean if there are too many connections leave with "waiting" status or if i limit teh bandwidth per ip then it will take longer for apache to serve them and probably can overload the RAM or the server too ?