I have an internal network, with an internal mail server.
When I do an DNS lookup for my mail server, it goes to
203.xxx.xxx.xx which is a public address.
The router is set up to do a port forward back to the internal 192.168.2.2 address if it's an external address.
However, the traffic doesn't seem to reach the mail server when the client is internal.
How do I setup the CISCO 877 router to
1. Do NAT from Inside to outside, then outside to Inside. Meaning a internal client trying to access an internal server with an external address.
I don't want to manage an internal DNS server just for this.