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Open Resolver Problems

On Mon, 1 Apr 2013, Valdis.Kletnieks at vt.edu wrote:

> You're sending queries, not replies.  That's why DPI is needed to do the 
> blocking, rather than just by port.

What queries are sourced from port 53 nowadays?

I'd imagine it's pretty safe to block Internet->customer UDP/53 packets.

Mikael Abrahamsson    email: swmike at swm.pp.se