recursion on auth-only server
cet1 at cam.ac.uk
Mon Sep 21 21:35:22 UTC 2009
On Sep 21 2009, Matus UHLAR - fantomas wrote:
>I have moved authoritative server to new IP address. I have changed the DNS
>name pointing to it so the NS would point to the new IP.
>Now I looked at the traffic and it seems that there are ~4 of 1000 recursive
>requests sent to it.
And do you know that this was not the case before the move?
>Are there any known resolvers that can iterate through NS hierarchy, or
>iterative DNS servers that send resursive requests anywhere?
There are all sorts of reasons, from misconfigured resolvers to manual
use of "dig" (do you always remember to specify +norec when "appropriate"?).
Query logging will help you track them down if you are really concerned.
At 0.4%, I wouldn't worry.
Email: cet1 at cam.ac.uk
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