I have a 3800HGV-B Gateway as part of AT&T Uverse install. I just discovered it does not have loopback.
I have multiple port ranges forwarding to multiple IPs on the LAN:
Ex: 2000-2010 to 192.168.1.100, 2020-2030 to 192.168.1.101, etc.
I reference the public IP address as mycompany.dyndns.org.
From outside the LAN, all is well.
From inside the LAN, can you think of a workaround that would allow me to make mycompany.dyndns.org:2001 go to 192.168.1.100:2001 and mycompany.dyndns.org:2021 to 192.168.1.101:2021?
By the way, the 3800HGV-B Gateway address is 192.168.1.254 and when I try accessing 192.168.1.254:2001 I do NOT get forwarding to 192.168.1.100:2001 (just in case someone thought of suggesting remapping my hosts file to the gateway).
Hope you guys have some workaround (right now I can only think of a VPN, and giving up dyndns for addressing)