We have our cisco router doing DHCP and performing NAT. We are not doing internal DNS.
We run internal mail, web & ftp. With our old router when we went to resolve mail.domain.com it would come back and reply with the external ip but allow us to connect.
With the cisco it resolves to the external IP but won't connect back in. It leaves OK but doesn't enter back through the router.
Another example is from inside the network I can't browse to our external IP and see our webserver.
Any ideas on how or what is different with Cisco's nat?
We run internal mail, web & ftp. With our old router when we went to resolve mail.domain.com it would come back and reply with the external ip but allow us to connect.
With the cisco it resolves to the external IP but won't connect back in. It leaves OK but doesn't enter back through the router.
Another example is from inside the network I can't browse to our external IP and see our webserver.
Any ideas on how or what is different with Cisco's nat?