Hello there
I am currently running a windows 2000 RRAS server configured as a NAT in my test lab successfully. I am trying to configure the same thing in windows 2008 R2 but I am running into some issues.
The RRAS server is configured as follows
Windows 2008 R2 SP1
Two network cards,
Internal network 192.168.0.1/16
External network 10.1.1.1/24
All the clients on the internal network have the default gateway set to 192.168.0.1 and an IP of the form 192.168.0.x
When I configure the RRAS as NAT without adding external ip address pools then everything works fine, i.e. all clients can access the external network. If I right click the external network under NAT and select “show mappings” I can see that the RRAS server maps internal IP addresses to its own external IP address on different ports.
If I configure an external IP Address Pool (10.1.1.2-10.1.1.50) so that I can add reservations and make clients on the internal network reachable from the external network, then I do see that the RRAS server is mapping the internal IP addresses to external IP addresses but no client is able to access the external resource, nor can I access the internal server from the external network. If I revert back to no IP pool configured, then after a while (look like the mappings need some time to “expire”) everything works fine again (mappings are back to the NAT server external IP address on different ports).
The very same configuration is working on windows 2000 RRAS, so I don’t believe there’s anything wrong with my network environment (such as switch configuration or IP address pool).
Any clue on this?
Thanks
Roberta