I connect to Comcast via a motorola Surfboard SBG 6580. Every once in a while my lap top and desktop wifi drop my router connection and hook up to xfinity wifi. Comcast tech states they cannot change my settings to prevent this because I am not using their modem. It seems I need to configure my settings on my lap that that runs with Linux Mint 17.

I would appreciate any help in finding a way to block my laptop from connecting to xfinity.

Thank you.

Is there a reason you need two routers? Is your router a commercial SOHO unit or something else? Are they located next to each other?

There could be many reasons why your laptop is dropping wifi connection from your router.

You should be able to configure bridge mode in the Comcast unit so it bypasses its router functionality. Your router will then connect straight to the internet. Do you have cables going to both units? Are you using your router as a wifi extender?

I would expect there is a setting in the Comcast router to turn off its wifi.

If you remove the Comcast SSID from NetworkManager it will not automatically switch but for the case of your desktop that would leave you not connected until it comes back.

If your desktop loses wifi connection since I assume it never moves I suspect your router's wifi is starting to go bad or maybe you have to many wifi devices connecting to it at the same time.

Open a terminal

that should make your system forget about the xfinity wifi network.


Bridge mode https://routerguide.net/motorola-sur...ge-mode-guide/
and I agree if you are using your own wifi router, turn off the wifi in the Motorola cablemodem

Thanks for your response Michaelk. I have one Motorola router that connects to the incoming Comcast cable directly.

Not sure why this in not working:

bill@bill-UL80VT /etc/NetworkManager/system-connections $ ls
ATT5s8h4X3
Auto ATT4yQ6Bbw
Auto CGNVM-2298
Auto CherryPie
Auto Dallen-guest
Auto Google Starbucks
Auto HolidayInnExpress GainesvilleFL
Auto HOME-69F2
Auto HOME-69F2-1439a518-5d09-4f1b-ad28-023d8b29db35
Auto selby-library-guest
Auto StayTheFuckOffThisWifi
Auto unplugged
Auto xfinitywifi
DIRECT-roku-704
intech
MOTOROLA-802C1
Zoom55eb
bill@bill-UL80VT /etc/NetworkManager/system-connections $ sudo rm Auto xfinitywifi
[sudo] password for bill:
rm: cannot remove ‘Auto’: No such file or directory
rm: cannot remove ‘xfinitywifi’: No such file or directory

So xfinitywifi is a neighbor or an open access point and your home SSID is something else?

Try
sudo rm "Auto xfinitywifi"

Your neighbors wifi could be interfering with your signal. You might want to try changing channels.
Cordless phones or other RF devices could be interfering with your wifi.
The wifi on your router could be going bad.

Thanks Michaelk. This seems to have done the trick and removed "Auto xfinitywifi" from my list of connections !