Wifi Extenders not working with new Comcast Wifi Gateway?

I recently started running into a problem with the new upgraded Comcast/Xfinity Wireless Gateway that Comcast is upgrading their customers with.   I had a client that I installed an Almond WiFi Extender in their home 6 months ago and it has been working just fine.  Suddenly it stopped working, in that it connects to the network but without an internet connection.  I assumed the Extender had failed so I installed a brand new one and same thing.  It connects to the wireless network but no Internet.

I took the Almond units (both new and old) back to my place where I have both Comcast Internet and FIOS and started experimenting.  I had the same issue.  I could connect just fine to the Comcast wireless but not Internet.  When I connected the same extenders to my Verizon Fios network, they worked just fine.  Just to double check, I went out and purchased a new Amped Touch screen Wifi Extender and tried that and I get the same problem.

I researched on line and some others are having the same issue and some claim that Comcast has told them that the Comcast Gateway DOES NOT work with Extenders?????

The thing that is puzzling me is that the Extender that I installed 6 months ago was working with the Comcast Gateway just fine and suddenly stopped working so all I can think of is that Comcast may have pushed out some form of update to the Gateway?
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Davis McCarnOwnerCommented:
You left out the model numbers of both devices which is vital information as it is the specifics which lead to a solution!

However; I did get a lot of hits on the Comcast XFinity boxes blocking the use of wireless range extenders so will offer this as a workaround.
1) Get a powerline kit and use it to connect the Almond to the Xfinity using Ethernet cables: http://www.newegg.com/Product/Product.aspx?Item=N82E16833704164 (Initially, you have to pair the powerline adapters to each other; but, after that, they use the household wiring to communicate with each other)
2)  If you need access to devices plugged into the XFinity, disable DHCP in the Almond, set it to act as a router, setup a different wireless SSID, and plug the Ethernet cable into one of the LAN ports on the Almond.  If you don't care about that, use the WAN port on the Almond, set it again to act as a router, and also use a different SSID.

The idea is to use one of the wired ports on the XFinity to communicate with the Almond, bypassing what is most probably a breakage of DNS forwarding on the wireless.

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waytronAuthor Commented:
Thank you for you reply.  Sorry about not providing the Model numbers.  At the time that I installed the Almond, they only had the single model which was the same case for Amped.  They only have the one touchscreen model.

I contacted Amped and they indicated that this is a known issue with some Comcast Gateways and setting a Static IP address on their Wireless Extender would solve the issue.  I did this on the Amped unit and it now works like a charm.  Unfortunately, I have not found a way to set the Almond unit to a static IP so I have sent them an email.
waytronAuthor Commented:
Here are the specs on the units involved:

Secutifi Almond Touch Screen Router + Extender - No Model number
Amped TAP-EX High Powered Wi-Fi Extender
Comcast Arris TG862 Wireless Gateway
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Davis McCarnOwnerCommented:
waytronAuthor Commented:
Thank you DavisMcCarn for your input but the Almond cannot be set to a static IP when in Extender mode.  This can only be done when it is in Router mode.

I spoke to Securifi and they seemed aware of the problem and it required manually installing a firmware update (not available automatically from the Almond unit itself) and then I had to change the Security setting on the Comcast Gateway.

It took awhile but It is now working correctly.  This was important to me because I have a lot of these ALmond units out there with clients and Comcast is replacing older modems and routers with these new Gateways at a very fast pace.

Thank you for your input.
waytronAuthor Commented:
Thank you
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