Have made every suggested change recommended by OpenDNS and after sending reports back to them they narrowed the issue to the Comcast DNS addresses 126.96.36.199 and 188.8.131.52 which cannot be changed in the Aris SB6121 modem. I'm using a Linksys WRT1900AC router. I've tried most work-arounds including setting the DNS in Windows 7 IPV4 (IPV6 is disabled) but it still won't use the OpenDNS addresses. No other workarounds change the DNS addresses to the ones OpenDNS recommends.
It appears that I need a user configurable modem that works with Comcast but they are to be difficult to identify. Comcast offers a compatibility list http://www.approvedmodems.com/comcast-xfinity.html but after checking several including the Cisco they aren't user configurable.
Has anyone found a Comcast compatible configurable modem? Or a viable workaround? Like I said, techs at OpenDNS have walked me through all workarounds and have narrowed it to the Comcast modem. I've read many OpenDNS and other threads but can't find this information.
Please do not respond to this posting by suggesting router changes, they do not work. This is a separate modem and according to OpenDNS that is where the issues lies.
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