A client is switching from dialup to IP based AT&T Global connection for a medical application.
We have SBS2003R2 with ISA2004 - all set up pretty plain vanilla. 2 Nic's on LAN and the WAN connected to a LinkSys RV042 router to DSL.
When previously we were using a modem, we always disabled the ISA on the client and the dialer worked fine. Now with the TCP/IP based we need to have the ISA client on to access the internet but it won't connect to the AT&T network.
Anyone been down this road before ?? Are there special ports for AT&T to open ?