Re: Unusable DNS, 10.4 Tiger
Re: Unusable DNS, 10.4 Tiger
- Subject: Re: Unusable DNS, 10.4 Tiger
- From: John Andersson <email@hidden>
- Date: Fri, 2 Dec 2005 10:26:21 +0100
I had the same problem on our DNS (it took 8 seconds or so to lookup
names).
I spendt a month or so trying to track it down, until I recieved the
info that the block size of lookups cant be over 512 Kb when using
certain firewalls.
We have a FireBox III here, and that seemed to be the problem. After
getting the last BIND (9.3.1, a version that handles this command), I
could set this in my named.conf file:
edns-udp-size 512;
This totally solved MY problem.
Hope this can be to any help!
/John
2 dec 2005 kl. 09.06 skrev Justin C. Walker:
On Dec 1, 2005, at 23:39 , Dalton Hamilton wrote:
From my understanding of how DNS resolution works, your #2
statement below doesn't make sense to me. DNS lookups use UDP
only. TCP is only used for zone transfers. Therefore, this
should not have affected resolution performance of a client
resolver to the DNS server.
Can you correct my mis-understanding?
Bind can be configured to use TCP for queries (cf. the RES_USEVC
option for the resolver (in <resolv.h>).
Regards,
Justin
--
Justin C. Walker, Curmudgeon-At-Large
Institute for General Semantics
--------
When LuteFisk is outlawed,
Only outlaws will have LuteFisk
--------
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