Topology : - TMG have two NICs , One for internal and the other for External  - External NIC connected directly to the Internet Modem with IP 196.xxx.xx.x9 and Getway .x8. - Internal NIC connected to internal Switch then to VPN router with IP 192.168.10.10. and GW 192.168.10.3 problem: I need to allow user from remote site to enter to Main Site Internet through TMG . Main Site with subnet 192.168.10.X/24 can see automatically the subnet of remote site 192.168.50.X/24 by default.

But through the TMG, i can't reach to remote site subnet 192.168.50.X, but when disable the External NIC. i can do that.

Requirements :

Allow remote site to access Main Site Internet through TMG

Appreciate your fast response.

Hi,

According to your description, my understanding is that you configured a default gateway for each NIC on the TMG server, right?

In general, if you have multiple NICs on the TMG server, then only one network adapter(the external NIC) should be configured with a default gateway.

For more detailed information, please refer to the link below:

Recommended Network Adapter Configuration for Forefront TMG Enterprise Edition Servers

Best regards,

Susie