Plesk 8.1 and Network Address Translation - NAT

[radialhosting]

I have a PIX 515e and I use internal IP addresses for my Plesk server (10.1.1.1). I need to find a way for plesk to use an internal IP address and some how allow for the DNS to report the internal resolution for that host. Once systems behind the firewall resolve an external IP that has NAT the traffic dies. You can't have the traffic do a u-turn on the firewall.