On 2/26/16, 1:03 PM, "NANOG on behalf of John Levine" <[email protected]<mailto:[email protected]> on behalf of [email protected]<mailto:[email protected]>> wrote: T-W and I am fairly sure Comcast have per-customer opt-out from DNS "enhancement". T-W's is at http://dnssearch.rr.com/prefs.php
I still don't use their DNS caches, but that's not the reason. Comcast stopped doing NXDOMAIN redirection on January 10, 2012, a little more than 4 years ago. We did so when we completed our DNSSEC deployment. The relevant announcements can be found at: http://corporate.comcast.com/comcast-voices/comcast-completes-dnssec-deployment and http://corporate.comcast.com/comcast-voices/comcast-domain-helper-shuts-down Regards Jason / Comcast
