I am using ATT dsl service and have a wireless router Dl-524 attached to a Westell dsl-modem. I am using the correct settings to forward ports on this router (as shown here link), but can't make this work. Shows the port i am using is not open. Using port 4025 for a ip-camera which works very well in my home wireless network.
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If you cannot connect to the port from outside the ATT network using your router's public IP address and port, then it is possible that ATT is blocking the connection. I know ATT does not allow servers unless you have a business account.
Hey all I just bumped into this thread Googling the same problem and solved the problem for myself. Turns out I still had port forwarding enabled on my AT&T gateway which apparently was causing problems with port forwarding on the Netgear router. Deleting my custom port configurations on the AT&T gateway solved my issue.