From ThirdMartini

[edit] bind9 resolving ipv6 dns entries on ipv4 network

If bind9 is resolving dns names badly:

Apr 21 06:42:18 snm named[32320]: network unreachable resolving 'comcast.net/NS/IN': 2001:558:1004:7:68:87:85:132#53

Force it into ipv4 only mode.

vi /etc/default/bind9  
OPTIONS="-4 -u bind"
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