Hi All,
I am hoping this will be an easy problem to resolve and that it's just my mis-understanding of how TMG works.
My current setup is a TMG 2010 server with 3 NIC's. One NIC that sits on my local LAN (192.168.0.*). The 2nd NIC goes to my Internal network (192.168.2.*) and the last NIC going to a DMZ (192.168.10.*).
I am trying to work on setting up Access Rules to go from the Internal network to the DMZ. I have setup rules for Edgesync and PING. Orginally I had the Edgesync rule going from the single Exchange server in the Internal network to the single Edge server in the DMZ and the PING rule going from the Internal network to the DMZ in both directions.
I couldn't get either of these rules to work so changed both rules to go from Internal to Local and DMZ to local. For the PING rule I can now ping the GW NIC from their respective network and also the opposing networks GW, however nothing beyond this. In other words from the DMZ I can now ping the DMZ GW 192.168.10.1 and also the Internal network GW 192.168.2.1 but no other device on the 192.168.2.* subnet.
I understand that this is probably correct as I am now forwarding traffic to the TMG's local NIC's however I can't figure how to send traffic directly from the Internal network to the DMZ.
Any help would be much appreciated!
Many Thanks
Matt Davies