Add the airline thingy application to the Firewall Client Application Settings with "disble=1". This way, the thingy hsould be able to connect to the thingy gateway. Jim Harrison MCP(NT4, W2K), A+, Network+, PCG http://isaserver.org/Jim_Harrison/ http://isatools.org Read the help / books / articles! On Thu, 5 Aug 2004 00:43:21 +0200 "William England" <william@xxxxxxxxxxxxx> wrote: http://www.ISAserver.org Hi I have a client who operates in the travel sector. Their internet connection is protected by ISA 2000. They also have an ADSL connection (bridge) to an Airline booking system. This is connected to the internal LAN. Each PC on the LAN has 2 IP addresses, 1 IP 192.x.x.x for the Internal ISA LAN and a 10.100.x.x to connect to the Airline system. If the firewall client is disabled both the LAN, connect to ISA and the airline system work fine. However if the ISA client is enabled the airline system stops working. I have added the 10.100.x.x range to the LAT....NO go Tried playing around with the firewall client ports in the ISA Client Configuration ...No go Tried adding Protocol definition and Rule..NO go This airline thingy needs TCP 4143 in and out Any help would be really appreciated. William ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: World of Windows Networking: http://www.windowsnetworking.com Leading Network Software Directory: http://www.serverfiles.com No.1 Exchange Server Resource Site: http://www.msexchange.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: jim@xxxxxxxxxxxx To unsubscribe visit http://www.webelists.com/cgi/lyris.pl?enter=isalist