Hello It all started when we got a newer HP Pavilion G Series laptop with Windows 7 that had a higher speed WiFi wireless card that could not even stream video off the internet like the much older Toshiba Satellite Lap top! I realize that our old Linksys wireless N Gigabit router WRT310N could not cut the mustard! Therefore I picked up the latest and greatest new Cisco Linksys EA6500 with the AC1750 and all those technical enhancements and newer security kielbasa! That means get ready for a good porkin! Well that did not make the HP work any faster! So we gave the Comcast rented Motorola modem back to Comcast and picked up the new Motorola Surfboard 6141 modem with all the new protocol Whoop-Di-Doos! Well that fixed the problem and the new HP could now upload files and stream video as fast as it was designed and we were happy with the new laptop. Then even though I set the new router up for port forwarding so I can come in off the web with my iphone 5 and see my schedule on our internet web server, the port was closed shut. That was back in March and I was too busy to deal with it so I put back the old router until yesterday! So yesterday I had the time to roll up my sleeves for the deep dive and as I suspected it was a big ordeal! Yes, I did update the firmware again and still made sure it did not work (current firmware version 18.104.22.168876)! A quick check of the Internet did not reveal much so I called Cisco Phone support which went to those very courteous and polite people in the Philippines. Of course after some lengthy waiting and menu selection, port forwarding and network issues were way over their heads so I was transferred to another company in the Philippines for level two paid support. The assured me it was a configuration problem that they deal with all day and for only approx $100 could do the best they could do to help me fix it with of course no guarantees! As I was spending an hour or so going through all the Hoop-Ti-Hoo. (I cannot use any other language here!) I learned from the internet that this is a serious issue that may be linked to the new security standards. Here is a guy having the same port forwarding not working problem with his IP web cam, trying to find a solution and also figure out what is going on. http://community.linksys.com/t5/Wireless-Routers/EA6500-Port-Forwarding-not-working/td-p/587452 > > I upgraded to a 6500 from a e4200 I still do not have a clear link from rebinding attacks to this specific problem however this whitepaper is very clear and concise about the seriousness and how deeply penetrating these dns rebinding attacks can be! > > http://crypto.stanford.edu/dns/dns-rebinding.pdf also see > > http://www.circleid.com/posts/070809_defending_networks_dns_rebinding_attacks/ One of the attacks in the paper where a visited web site by and user's browser on an internal network can retrace the user's route and circumvent the firewall by finding DNS resolution to an internal computer or server. Hence this is why it is called DNS rebinding. Therefore that is the current way that I know of how port forwarding gets you to an internal web server! AhHa, so is there a new way of port fowarding the the new routers like the Cisco Linksys EA6500 and what is the new way and how do you get it to work or is there a big bug? I am sure an answer will be forth coming soon! So I went thru the possibilities I had to find a solution 1. Return the EA6500 router and keep trying other new ones? - Anyone know if this is a good fix? 2. Go back to the old router I had that will easily port forward to our web server?. - Does not fix the problem 3. Hook up both routers in parallel. - Need another leased IP address from our ISP comcast. Not a very pleasing option! - Probably not free either! 4. Hookup the routers in series. a. If the new router is 1st and plugged into the cable modem then port routing will not work. b. If the old router is 1st then will the speed be bogged down like before? Well as a last gas, I tried 4b. To do this I had to change the static IP address of the old router box so it would not conflict with the new router box. To our surprise the smaller pipe from the old router to the new router has minimal effect! Probably due to large buffers in the new router and the higher speed technology! After all it is a larger box! See pic below: So my 2 day ordeal yielded a fix for now. LOL Anyone else have this problem and find a fix? ? ? Click to Enlarge.