Comcast-compatible router that can disable ipv6

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5 comments

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    rotblitz

    Disabling IPv6 is not the way to go.  Over time you'll run more often in situations where you cannot reach what you want to reach without IPv6, because many IPv6-only sites will come up more and more.

    If you want to use OpenDNS filtering and IPv6 connectivity, you must take care to send your DNS traffic through IPv4 only.  You can achieve this by using the following as DNSv6 resolver addresses:

    ::ffff:d043:dede  ::ffff:d043:dcdc  ::ffff:d043:dedc  ::ffff:d043:dcde

     

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    mattwilson9090

    If you don't want to use rotblitz method, or if the Comcast router doesn't allow using your own manually added IPv6 DNS resolver addresses your best bet is to add a router "inside" the router provided by Comcast and configure it there. In fact, I recommend doing this anyway, for a myriad of reasons, not just limited to Comcast and IPv6.

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    emmyloula

    mattwilson9090 I just joined Comcast but couldn't use their modem/router with OpenDNS so I am using my own router (which is four years old and needs to be updated).  You seem very familiar with this situation - can you possibly tell me what features I should be looking for in a new router that will be fast enough for Comcast (75mbps) but allow OpenDNS configuration?  I also love the parental controls of my old Cisco router if you know anything about that (device specific filtering / connection restrictions)

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    rotblitz

    It seems that mattwilson9090 is not available just now.

    https://en.avm.de/products/fritzbox/
    These routers can be used with VDSL2 connections, and OpenDNS can be configured, inc. dynamic IP address updates.  And you do not need to disable IPv6 but can continue to use it if you enter the resolver addresses I listed above.

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    mattwilson9090

    @ehb1476 As rotblitz said, I wasn't able to respond for a few days.

    I can't tell you what features you should be looking for since I don't know your actual requirements, aside from 75 Mbps throughput, which is presumably the speed you are paying for now. We know nothing about your network, number of devices, users, what kind of traffic you'll be sending and receiving, WiFi requirements (again speed, type and number of devices and users), etc. and any number of things.

    As for your Cisco router I can't tell you if I know anything about it or not since you didn't say what model it is. That's like saying your car is a Ford without actually saying what model it is.

    As for me, I personally have chosen to use third-party firmware due to additional options it provides, in this case the Toastman variation of Tomato. Unfortunately that does limit my router firmware choices, and until recently couldn't run on any of the newest hardware that uses ARM processors. For my hardware I'm currently using an ASUS RT-N66U, which I chose partially for it's larger amount of memory, 802.11n Wi-Fi and enough throughput to support the 100 Mbps up and down I'd be getting when I switched to a fiber connection. I knew it wouldn't support 802.11ac, but that didn't bother me. However, the ISP provided a free upgrade for everyone to 300Mbps and I can only get 125 Mbps up and down with this new hardware so I'm looking for new hardware that can support the speed I'm getting now.

    All this is a long way of explaining that you need to know your own needs and requirements before you start specifying router hardware or software.  Your answers to that will likely lead you down a different path than the one I took.

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