Hi, I have the following setup and the following question.
We have an internal AD network, with several servers for internal use, such as Exchange, some web servers with applications, which are accessed by sub domains.
Our domain example.com is registered and points to our public IP. Internally we use that domain name, with DNS pointing to the internal servers with the sub domains.
Our issue is: how do we point sub domains to the right server from outside? Internally, if I go to exchange.example.com, I get my Exchange server on 192.168.10.2. Externally exchange.example.com points to our public IP. Using NAT in our firewall results in every sub domain from outside being pointed to one server (192.168.10.2), unless we use different ports from outside and have NAT route to the right server. Which is what we want to avoid: having people remember ports to type after the URL. intranet.example.com should point to the same public ip from outside, but should connect to a different server than exchange.example.com.
Specifics:
AD: Domain and forest level: 2008
Server OSes: Windows server 2008, 2008 R2, Ubuntu 12.04 LTS
Virtualization: VMWare ESXi 5.1
Firewall: Vyatta 600 Appliance
Hope my situation is clear enough to get assistance. Thanks in advance.