[ale] Comcast DNS

[David Ritchie]

Hints to speeding up DNS resolution:

1) Download Wireshark and perform a trace while navigating via
browser. Sort the
results by protocol.  You arelooking for DNS queries. If you see a AAAA query,
you are trying to resolve via an IPv6 DNS lookup.

This sounds good right up to the point that no IPv6 DNS
server responds (because you are sitting on a IPv4 network). This will timeout,
and then typically a IPv4 (A type) query will go down the wire and be resolved.
The problem is that it takes about 10 seconds for this process to complete.

2) Turn off IPv6 resolution in your browser (Firefox defaults to this being ON,
for some insane reason.) "about:config", click through to get to the config
and type ipv6 in the search box - it will pull up
'network.dns.disableIPv6' - if this is
not true, toggle the entry to make this true...

Most of the time this will resolve the problem.