Firewall-1 4.0 and Microsoft iLS server

[Vijay V]

Hi all, I am facing a queer problem with my Firewall-1 4.0 / Windows NT 4.0 setup. I have a DMZ style network with the following interfaces: - an external interface, directly connected to the router. - an internal interface, connected to my internal LAN. - the DMZ. All my machines with valid Internet IP addresses are located on the DMZ. Recently, I installed a machine running Microsoft ILS server on the DMZ, idea being that people from Internet as well as my internal network can logon to the ILS and then do NetMeeting. The queer part is that if I define a rule-pair: any -> ILS, any, permit and ILS->any, any, permit, the setup does not work. However, if I define: any -> ILS, NetMeeting, permit and ILS->any, NetMeeting, permit, ILS works fine and people can logon but they are not able to establish NetMeeting session.   So how can i implement NetMeeting from my internal network (private network)  to outside network. Any help would be highly appreciated. Regards, Vijay