Date: Mon, 17 Mar 2003 19:54:44 -0800 (PST) From: Doug Barton <DougB@FreeBSD.org> To: Paolo M <fabrica64@yahoo.com> Cc: questions@freebsd.org, net@freebsd.org Subject: Re: BIND stange behavior Message-ID: <20030317193338.N15437@mbbg.pbec.lnubb.pbz> In-Reply-To: <20030306215023.64687.qmail@web14803.mail.yahoo.com> References: <20030306215023.64687.qmail@web14803.mail.yahoo.com>
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On Thu, 6 Mar 2003, Paolo M wrote:
> Hi Everybody,
>
> I am using a FreeBSD 4.7p7 box as the gateway to the
> Internet in my home.
>
> I saw a very starnge behavior accessing mail.yahoo.com
> from a connected Apple MacOS (but also from any other
> PC), the first attempt to resolve the names replies an
> error. If I repeat the request everything is fine. If
> I wait some minutes all the sequence repeats...
Are you blocking TCP for your name server by chance, or are you behind a
PIX firewall? The answer for mail.yahoo.com is sometimes larger than a UDP
packet can handle, so your resolver is either retrying with TCP, and/or
it's negotiating a UDP packet size larger than PIX firewalls can
understand.
Doug
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