Hello Everything was fine until we got some new laptops and the internet upload and download speeds on the new computers were very slow. Slower than the old computers! So I got a new Linksys EA6500 cisco smart wi-fi router AC 1750 but it did not seem to work with the older Motorola SB4220 Surfboard Cable Modem. So I checked with Comcast and they seemed to be pushing their new cable modem with built-in router and telephone service all in one package. I tried to find out if their new modem/router all in one box that I ordered would support port routing so I could see one of my computers with my iphone. I could not get and answer. Even if the setup for port forwarding was in there would it work? Noone could tell me! The cable guy who came to my house said one of their customers could not download their Tivo menu with the new cable modem/router box. So I called up and cancelled my order for the new cable modem/router telephone package! Then a half hour later all the TVs went dead! So now I am a new customer with 6 months of cable for 1/2 price. Anyway, I found out from a friend who has a new Motorola cable modem with Docsis 3.0 the speeds are up to the latest specs. Ok, I purchased a new Motorola Surfboard SB6141 cable modem from Best Buy and hooked up the new router also. I Installed the software and got them working but after trying all the port routing settings, I could not get port routing to work. Finally I put the old Linksys WRT310N wireless N gigabit router back in and got the port routing working! The download speed increased from 1.5 mbits/sec to 10 mbits/sec and the upload speeds from 0.75 mbits/sec to 5.0 mbits/sec success! I can also take the old modem back to Comcast and stop paying $7 per month for it. Is anyone else doing port routing with success? Old modem on right in pic.