Tricked by Comcast

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16 comments

  • Avatar
    jedisct1

    An option is to put a router in front of it. Pick a router that can run an open firmware, and you will be able to use OpenDNS, using port 443. And of course, you are likely to get better Wifi coverage.

  • Avatar
    msftwise

    Thanks but I already tried that with a Linksys G, it did give better wifi, naming it the same with the same security, but it could not get Internet and I could not log into it from my system anymore.
    Is there a tutorial on-line somewhere that shows how to do this?

  • Avatar
    maintenance

    Your Linksys manual should show you how.  But being that the gateway seems to be  non-configurable (is it?), this may be difficult. If the problem is only that you cannot change the DNS addresses on the new gateway, that is pretty standard for any ISP now, particularly those who provide VOIP and IPTV/cable over the same network. (Never mind that they could make it so you can configure DNS just for the LAN, and not for TV/phone.)

  • Avatar
    msftwise

    Very much appreciate the help.
    The new device, gateway,  hardware model is: SMCD3GNV
    From what I've been able to tell it is blocking all of my efforts.
    We only use Comcast/xFinity for Internet, not for TV, Email or anything else.
    Getting the Linksys to access the Internet from that new gateway has so far been fruitless.
    Thanks again...

  • Avatar
    rotblitz

    Then you may try to replace your ISP device by your Linksys router.

  • Avatar
    msftwise

    So far support with them has been unbearable.
    I've ordered a new device and will return the smc to them, if you look in their forums you'll see everyone hates that thing.
    Should be back with openDNS soon.
    Thanks..

     

  • Avatar
    msftwise

    Success! Activated with the new Arris Touchstone and my Linksys router. Back with OpenDNS!

  • Avatar
    cydoc

    How did you configure your new Arris Touchstone and Linksys router to work with OpenDNS? Thanks.

  • Avatar
    maintenance

    You likely don't configure the Arris, but the router behind it.

  • Avatar
    cydoc

    From reviewing people's experiences with the Arris gateway modems, if you put a router behind it, the Arris ignores the router's third-party DNS request and uses the ISP's own DNS instead. If you put the router in front of the Arris, then you don't get Internet since the Arris modem is provisioned and required to process the ISP signal to allow Internet access. That's why I was wondering how msftwise was able to use the Arris device plus the Linksys router to get OpenDNS working.

    I've used OpenDNS successfully with other cable modems by configuring my router (behind the modem), since most cable modems seem to pass the DNS request through without a problem. Internet research seems to indicate the Arris modem has a firmware bug where it doesn't do this.

  • Avatar
    msftwise

    This is all rather confusing, talking about putting it behind the modem.
    What I did was connect the Arris Touchstone to the Comcast cable then run the CAT6 network from my Linksys over to it.
    My WIFI and wired LAN connections get their Intranet from the Linksys, which gets it's only input from the Arris.
    It's working, OpenDNS is working and my WIFI is a gazillion times better than it was with that SMC from Comcast.
    Everywhere on-line people are complaining about that SMC, even the Comcast guy I turned it back in to told me they know it's junk.
    Hope that helped...

  • Avatar
    cydoc

    Thanks - I couldn't make it work, but I'm glad it did for you.

  • Avatar
    arandomusername

    msftwise's solution worked for me. Followed his steps exactly, and it worked immediately (Linksys router + Comcast Arris combo router/modem).

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    computer.support

    Hi. Sorry people a frustrated by XFINITY. When you use a Gateway Device, You are limited in so many ways. DNS being one of them. If you do have a gateway modem and want it to work with OPENDNS, Why open a port? XFINITY should be able to set it up for Bridging on their end. Hook up your router and good to go. FYI WAN is #1 port you should plug the router into. Do not connect to #2,#3or #4 ports. Use the router ports. 

  • Avatar
    jpbowls

    Thanks everyone for the ideas, but I do not fully understand how to bridge my Arris Tg852. I have set each laptop up with Opendns and it works great,but if my sons friends come toour home would like all computers or handhelds to block content.  A comment was made about purchasing a Linksys router, this is something I would like t0 do but what router should I buy and how to setup thanks.

     

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