Best practice on TCP replies for ANY queries

Tony Finch dot at dotat.at
Thu Dec 12 13:29:45 UTC 2013


Anurag Bhatia <me at anuragbhatia.com> wrote:
>
> Now I see presence of some (legitimate) DNS forwarders and hence I don't
> wish to limit queries.

You are going to have to change your mind about this one. Open recursive
resolvers are a really bad idea, unless you can afford a lot of time and
cleverness to manage the abuse. Get your users to choose a more
appropriate name server, and restrict your name server to your local
networks.

Tony.
-- 
f.anthony.n.finch  <dot at dotat.at>  http://dotat.at/
Forties, Cromarty: East, veering southeast, 4 or 5, occasionally 6 at first.
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occasionally poor at first.



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