I have a scenario where ISA 2004 is the default gateway for the network and has 2 NICs. The 2nd NIC is in a DMZ and the default gateway on the ISA is an ASA.
1 PC, Non-domain joined has an FTP application that connects out through the ISA and down a VPN that is terminating on the ASA. Basically, the FTP app fails and we can see that the IP address attempting to connect to the FTP server on the other side of the VPN is the IP address on the LAN side of the ISA server.
ISA is proxying the FTP connection. I want the source IP of the PC establishing the FTP connection to hit the FTP server. I have added in a route from the PC to the subnet where the ISA server sits so ISA is not NATing the connection.
I cannot install the ISA client on the PC and the default gateway on the PC is the ISA server.