I have a BM 3.5 install that has been chugging along for about 5 years.

This server used to be the gateway to the internet running BM proxy and VPN

We have made a topology change now where this machine is inside another
packet filtering firewall. The BM server has but 1 NIC now.

When I connect to the IP address from outside the networks I seem to
authenticate but can not connect to any services. Is it possible to set
up the VPN server with 1 NIC? I read something about NAT but didn't
quite understand how to set that up and still use the proxy on the server.

Does someone else have their VPN server behind their firewall?

Thanks in Advance,