I have a Windows 2003 server that is a DC, DNS, DHCP and Routing and Remote access server for VPN's.
The external interface is on 172.16.0.10 and the internal is on 192.168.0.10. I have noticed that when a VPN connection is attempted, the SYN packet arrives on the external interface but the SYN ACK is sent out through the internal interface with a source address of 172.16.0.10.
The default gateway is set on the internal interface currently as 192.168.0.1. How can I get the VPN server to reply on the correct interface?