Our router (integrated services 2811) PAT to a single sub net. We have a web server located on the sub net.
When using public DNS from a computer on the LAN (other than the web server) we obviously get the public IP address for our website. This results in the request being sent to the WAN port of the router. Even though the router is configured to forward port 80 on the WAN port to the web server, it does not forward the request if the request originally came from the LAN.
Quite simply, the question is: How do you forward LAN requests made to the public IP address (WAN) on the router back into the LAN?
From what I have found online is that this is nearly impossible to do. If it is, why? A cheap Lynksys router does it quite easily.