[cicada]

Maybe others have had a positive experience with the new combo router/ modems being offered by your isp. Not me... My provider gave me a new modem/ router a while back (Cisco). Unlike my old unit, it had the wifi built into the modem. I tried everything and I could not get the ports to open. I called my isp and they told me it is possible to "bridge" to my old wifi router (the one that I was able to get open ports). They were apologetic and asked me to come down and swap out the their "new and improved" modem for an older model - one with no built in router. It was a hassle, but worth it in the long run.

If you don't have one already, you can pick up a cheap wifi router (D-Link or whatever). Instructions for bridging were easy and it worked like a charm. See if C/S will help. If not, then time to look for a new isp. Good luck!