Search this site


Metadata

Articles

Projects

Presentations

Comcast DNS breaks the internet

I only noticed this now. Perhaps it is old.
% dig +noquestion +nostats +nocmd +nocomments www."I wonder if this query will return".com 
www.I\032wonder\032if\032this\032query\032will\032return.com. 0 IN A 208.68.139.38

% dig +short www."$(dd if=/dev/urandom bs=1 count=30 2> /dev/null)".com 
208.68.139.38
Comcast only appears to be stealing dns queries for www.*.<tld>, which is slightly less annoying than what OpenDNS does, but OpenDNS is opt-in (you have to point your dns at opendns, where Comcast tells your cable modem what it should advertise for dns over dhcp).

Sigh.