Before the Deracho killed my D-Link router, port forwarding worked flawlessly. Now that I've "upgraded" to the Comcast SMCD3GNV gateway, none of my port forwards work. Also the interface that gateway uses is different than what is shown in the manual. The manual shows public and private ports while my interface only shows the public starting and ending ports. What's up with that? Do I need to upgrade the firmware? So far telephone and chat help have been useless. Has anybody else been able to get port forwarding to work with this gateway?
I've done some testing with some "port forwarding" sites and they confirm that the ports are open but I still cannot connect to the servers from the internet. Connecting to my webserver times out and trying to RDP to my servers say the computer cannot be found. I've disabled the firewall on the gateway and that did nothing at all to help. Not sure what to try now.
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Well...perhaps Comcast should know better...but...frankly, wireless gateways are universally poor solutions when it comes to router functionality. Some folks make out okay with them, but the problems far, far exceed the successes.
I had dsl for over 10 years, and the 2-Wire gateway that AT&T championed was a major-league piece of junk. I simply have yet to be shown that you can combine modem and router functionality in one chassis and have a quality unit.
Buy a decent router (not a bargain-basement model, regardless of brand!), have Comcast bridge your gateway, and life will become a whole bunch easier...at least as far as your home network is concerned!