I have a forefront TMG 2010 firewall configured in an edge configuration.
our internal network has three subnets
192.168.2.0/24 - Internal network NIC address 192.168.2.3
10.1.0.0/16 - Internal network (Cisco 4507 routed through 192.168.2.1)
All PC's on the 192 subnet have a default gateway of 192.168.2.3
All PC's on the 10. subnet go to 10.1.1.6 (Address of cisco router)
the Vlan on the 192 subnet has an interface address of 192.168.2.1
In TMG networking the internal network is defined with both subnets and I have a network topology route of 10.1.0.0 MASK 255.255.255.0 192.168.2.1 METRIC 256
Forefront keeps thinking that traffic from the 10.1.0.0 network is spoofed. I keep getting "A non-SYN packet was dropped because it was sent by a source that does not have an established connection with the Forefront TMG computer"
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