I use TMG as our companies Proxy as well as default gateway. I have recently installed 2 sonicwall tz105 devices, one located at our branch office and one located in our main office where the TMG server is located. The branch office uses this device for internet access and a vpn tunnel to our main office. (At one time I had a ISA server at the branch location and it was the vpn tunnel to our main but this is a small 2 man office and keeping the isa server up to date was becoming a pain.) The branch office has no problems accessing the main office. My problem is getting the main office to access the branch office. Right now if a client computer on the main network wants to access a server on the branch office the only way to accomplish this is to change the client computers gateway from the tmg server ip to the sonicwall ip. This was not a problem in the past when I had 2 isa or tmg servers at both locations because the rules would pass the traffic to the branch office. I have tried putting rules in the TMG server for traffic bound to the branch office network but nothing seems to work.
Should I be using tmg rules to accomplish this or do I need to go a different route such as dns or routing.
Thanks,