Re: [squid-users] Does squid use UDP or TCP for it's DNS requests

Yes, but how do you define a "larger DNS request" That is really just a
zone transfer. A DNS request is a request for a single resolution. A
request for a block of IP's or names or anything else is a full or partial
zone transfer.

In general, it is best to open both TCP and UDP port 53 to your DNS servers,
but I have gotten away with only using UDP on servers that are only serving
queries and are not authoritative for any domains.

--Jason

----- Original Message -----
From: "Boosten, Peter" <Peter.Boosten@dsm.com>
To: "'Jason M. Kusar'" <jason@swordofthespirit.org>; "Darren Birkett"
<darren@birkett.com>; <squid-users@squid-cache.org>
Sent: Wednesday, February 05, 2003 8:26 AM
Subject: RE: [squid-users] Does squid use UDP or TCP for it's DNS requests

> #
> # All DNS requests are done over UDP. DNS only uses TCP for
> # zone transfers.
> #
>
> Not entirely true: larger DNS-requests are done over TCP as well.
>
> Peter
>
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Received on Wed Feb 05 2003 - 06:36:49 MST