AT&T blocking individual IP addresses

Scott Howard scott at
Wed Dec 9 10:03:01 CST 2009

On Wed, Dec 9, 2009 at 7:25 AM, Dobbins, Roland <rdobbins at> wrote:

> > Traceroute to the neighboring IP addresses don't go anywhere near the
> above path, so it's apparently a blackhole of sorts.
> Are they bots or C&C servers, or open DNS recursors?

They are (authenticated-required) proxy servers with 10's of thousands of
users behind them, so it's possible that they were seeing some bot-like
traffic from them, although the volume would have been tiny compared to the
volume of legitimate traffic.


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