I just purchased a WRT54G last week and am interested in using one of the different firmware's available for installation. Most of them I see support DCHP reservations which is great. What I'm really looking for are advanced rules to forward ports only from specific a source IP address or specific network. I basically only want the port forwarding allowed only if it's coming from an network source address I specify in the config. Do any of alternative firmwares have this functionality? Thanks.