Apparent BIND problem doing RBL lookups for Postfix

listserv.traffic at sloop.net listserv.traffic at sloop.net
Thu Apr 15 19:11:37 UTC 2010 

Hello Nuno,

Thursday, April 15, 2010, 9:43:52 AM, you wrote:

> Hi,

> At the first sight it seems network problems, but when you restart bind,
> the problem goes away for a while.
> I suppose your dns server is resolving names for himself, try to put
> your ISP's dns servers on resolv.conf, perhaps it solve the problem.
> It could be a problem with your dns forwarders but I think it's
> unlikely, anyway, try different dns configurations on resolv.conf and if
> it works, update bind forwarders parameter accordingly.

Well, using forwarders might fix "general" bind errors, but it's
likely to run into problems for RBL lookups at spamhaus.org - since they have
limits (100K SMTP connects a day, and 300K lookups)

So using my ISP's name servers which have higher volume is likely to
run afoul of those limits because it's aggregating traffic. Even if
it doesn't right now, it could at any time when someone else does the
same and that increase in lookups pushes us over the edge.

Unless I misunderstand your recommendations - it seems like your fix
to a broken bind server is to use someone else's bind server. :(

While it may solve a symptom, it's not really a fix, and in this case
it's unlikely to even solve the symptom either.

Thanks for your thoughts though.

-Greg

> -----Mensagem original-----
> De: bind-users-bounces+nunopaquete=lusocargo.pt at lists.isc.org
> [mailto:bind-users-bounces+nunopaquete=lusocargo.pt at lists.isc.org] Em
> nome de listserv.traffic at sloop.net
> Enviada: quinta-feira, 15 de Abril de 2010 01:34
> Para: bind-users at lists.isc.org
> Assunto: Apparent BIND problem doing RBL lookups for Postfix

> My apologies if I'm posting the wrong place, or am asking a common
> question. All my looking so far hasn't turned up anything very useful
> in knowing what to look at, or what to modify.

> ---
> CentOS 5, running BIND 9.3.6
> i386

> Hardware:
> P4, 2.8Ghz, 1G memory
> Sata drives - non mirrored etc.

> Load is light, usually under 0.1

> --
> This box is running Postfix as our mail server. BIND (9.3.6) [Latest.]

> --
> Problem:
> Postfix is doing RBL lookups on zen.spamhaus.org.
> Everything goes along groovy - but then lookups start failing.

> Early in the process, we get stuff like this: [We have a "successful"
> lookup, and then a failure...]
> ---
> Apr 14 14:25:05 mail postfix/smtpd[22281]: NOQUEUE: reject: RCPT from
> bzq-79-183-5-119.red.bezeqint.net[79.183.5.119]: 554 5.7.1 Service
> unavailable; Client host [79.183.5.119] blocked using zen.spamhaus.org;
> from=<contriveclaudia at royalmoore.com>
> to=<contriveclaudia at royalmoore.com> proto=SMTP
> helo=<bzq-79-183-5-119.red.bezeqint.net>

> Apr 14 14:25:07 mail postfix/smtpd[22804]: warning:
> 33.229.242.205.zen.spamhaus.org: RBL lookup error: Host or domain name
> not found. Name service error for name=33.229.242.205.zen.spamhaus.org
> type=A: Host not found, try again
> ---
> As you can see, we had a lookup succeed and then just right after, one
> fail - claiming it got no answer from BIND. I get others after this that
> SUCCEED - so it's not in 100% failure mode yet.
> After time [how much, I don't know] eventually all the zen queries
> [or most all] fail.

> A bind restart fixes the problem. [Hmmm...]

> ---
> I do some logging in bind, and I don't see any reason for them to fail.
> Here's a bind debug log of 5 on that failure above.

> ---
> 14-Apr-2010 14:24:57.654 queries: info: client 127.0.0.1#42018: query:
> 33.229.242.205.zen.spamhaus.org IN A +
> 14-Apr-2010 14:24:57.654 security: debug 3: client 127.0.0.1#42018:
> query (cache) '33.229.242.205.zen.spamhaus.org/A/IN' approved
> 14-Apr-2010 14:24:57.654 resolver: debug 1: createfetch:
> 33.229.242.205.zen.spamhaus.org A
> 14-Apr-2010 14:24:57.654 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): create
> 14-Apr-2010 14:24:57.654 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): join
> 14-Apr-2010 14:24:57.654 resolver: debug 3: fetch 0x94a0b20 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): created
> 14-Apr-2010 14:24:57.655 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): start
> 14-Apr-2010 14:24:57.655 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try
> 14-Apr-2010 14:24:57.655 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelqueries
> 14-Apr-2010 14:24:57.655 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): getaddresses
> 14-Apr-2010 14:24:57.655 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query
> 14-Apr-2010 14:24:57.655 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send
> 14-Apr-2010 14:24:57.655 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent
> 14-Apr-2010 14:24:57.655 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected
> 14-Apr-2010 14:24:57.655 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone
> 14-Apr-2010 14:24:59.657 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout
> 14-Apr-2010 14:24:59.657 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery
> 14-Apr-2010 14:24:59.657 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try
> 14-Apr-2010 14:24:59.657 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query
> 14-Apr-2010 14:24:59.657 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send
> 14-Apr-2010 14:24:59.657 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent
> 14-Apr-2010 14:24:59.657 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected
> 14-Apr-2010 14:24:59.657 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone
> 14-Apr-2010 14:25:01.658 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout
> 14-Apr-2010 14:25:01.658 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery
> 14-Apr-2010 14:25:01.658 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try
> 14-Apr-2010 14:25:01.658 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query
> 14-Apr-2010 14:25:01.658 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send
> 14-Apr-2010 14:25:01.659 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent
> 14-Apr-2010 14:25:01.659 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected
> 14-Apr-2010 14:25:01.659 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone
> 14-Apr-2010 14:25:02.653 queries: info: client 127.0.0.1#42018: query:
> 33.229.242.205.zen.spamhaus.org IN A +
> 14-Apr-2010 14:25:02.653 security: debug 3: client 127.0.0.1#42018:
> query (cache) '33.229.242.205.zen.spamhaus.org/A/IN' approved
> 14-Apr-2010 14:25:02.654 resolver: debug 1: createfetch:
> 33.229.242.205.zen.spamhaus.org A
> 14-Apr-2010 14:25:02.654 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): join
> 14-Apr-2010 14:25:02.654 resolver: debug 3: fetch 0x94d54c8 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): created
> 14-Apr-2010 14:25:03.660 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout
> 14-Apr-2010 14:25:03.660 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery
> 14-Apr-2010 14:25:03.660 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try
> 14-Apr-2010 14:25:03.660 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query
> 14-Apr-2010 14:25:03.660 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send
> 14-Apr-2010 14:25:03.660 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts,
> disabling EDNS0
> 14-Apr-2010 14:25:03.660 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent
> 14-Apr-2010 14:25:03.660 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected
> 14-Apr-2010 14:25:03.660 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone
> 14-Apr-2010 14:25:05.663 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout
> 14-Apr-2010 14:25:05.663 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery
> 14-Apr-2010 14:25:05.663 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try
> 14-Apr-2010 14:25:05.663 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query
> 14-Apr-2010 14:25:05.663 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send
> 14-Apr-2010 14:25:05.663 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts,
> disabling EDNS0
> 14-Apr-2010 14:25:05.663 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent
> 14-Apr-2010 14:25:05.663 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected
> 14-Apr-2010 14:25:05.663 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone
> 14-Apr-2010 14:25:07.664 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout
> 14-Apr-2010 14:25:07.664 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery
> 14-Apr-2010 14:25:07.664 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try
> 14-Apr-2010 14:25:07.664 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query
> 14-Apr-2010 14:25:07.664 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send
> 14-Apr-2010 14:25:07.664 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts,
> disabling EDNS0
> 14-Apr-2010 14:25:07.665 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent
> 14-Apr-2010 14:25:07.665 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected
> 14-Apr-2010 14:25:07.665 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone
> 14-Apr-2010 14:25:08.393 queries: info: client 127.0.0.1#50896: query:
> 33.229.242.205.zen.spamhaus.org IN A +
> 14-Apr-2010 14:25:08.393 security: debug 3: client 127.0.0.1#50896:
> query (cache) '33.229.242.205.zen.spamhaus.org/A/IN' approved
> 14-Apr-2010 14:25:08.393 resolver: debug 1: createfetch:
> 33.229.242.205.zen.spamhaus.org A
> 14-Apr-2010 14:25:08.393 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): join
> 14-Apr-2010 14:25:08.393 resolver: debug 3: fetch 0x94ad9c8 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): created
> 14-Apr-2010 14:25:09.666 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout
> 14-Apr-2010 14:25:09.666 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery
> 14-Apr-2010 14:25:09.666 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try
> 14-Apr-2010 14:25:09.666 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query
> 14-Apr-2010 14:25:09.666 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send
> 14-Apr-2010 14:25:09.666 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts,
> disabling EDNS0
> 14-Apr-2010 14:25:09.666 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent
> 14-Apr-2010 14:25:09.666 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected
> 14-Apr-2010 14:25:09.666 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone
> 14-Apr-2010 14:25:11.668 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout
> 14-Apr-2010 14:25:11.668 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery
> 14-Apr-2010 14:25:11.668 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try
> 14-Apr-2010 14:25:11.668 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query
> 14-Apr-2010 14:25:11.668 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send
> 14-Apr-2010 14:25:11.668 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts,
> disabling EDNS0
> 14-Apr-2010 14:25:11.668 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent
> 14-Apr-2010 14:25:11.668 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected
> 14-Apr-2010 14:25:11.668 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone
> 14-Apr-2010 14:25:13.669 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout
> 14-Apr-2010 14:25:13.669 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery
> 14-Apr-2010 14:25:13.669 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try
> 14-Apr-2010 14:25:13.669 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query
> 14-Apr-2010 14:25:13.669 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send
> 14-Apr-2010 14:25:13.669 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts,
> disabling EDNS0
> 14-Apr-2010 14:25:13.670 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent
> 14-Apr-2010 14:25:13.670 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected
> 14-Apr-2010 14:25:13.670 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone
> 14-Apr-2010 14:25:15.671 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout
> 14-Apr-2010 14:25:15.671 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery
> 14-Apr-2010 14:25:15.671 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try
> 14-Apr-2010 14:25:15.671 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query
> 14-Apr-2010 14:25:15.671 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send
> 14-Apr-2010 14:25:15.671 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts,
> disabling EDNS0
> 14-Apr-2010 14:25:15.671 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent
> 14-Apr-2010 14:25:15.671 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected
> 14-Apr-2010 14:25:15.671 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone
> 14-Apr-2010 14:25:17.673 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout
> 14-Apr-2010 14:25:17.673 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery
> 14-Apr-2010 14:25:17.673 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try
> 14-Apr-2010 14:25:17.673 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query
> 14-Apr-2010 14:25:17.673 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send
> 14-Apr-2010 14:25:17.673 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts,
> disabling EDNS0
> 14-Apr-2010 14:25:17.673 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent
> 14-Apr-2010 14:25:17.673 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected
> 14-Apr-2010 14:25:17.673 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone
> 14-Apr-2010 14:25:19.674 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout
> 14-Apr-2010 14:25:19.674 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery
> 14-Apr-2010 14:25:19.674 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try
> 14-Apr-2010 14:25:19.674 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query
> 14-Apr-2010 14:25:19.674 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send
> 14-Apr-2010 14:25:19.674 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts,
> disabling EDNS0
> 14-Apr-2010 14:25:19.675 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent
> 14-Apr-2010 14:25:19.675 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected
> 14-Apr-2010 14:25:19.675 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone
> 14-Apr-2010 14:25:21.676 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout
> 14-Apr-2010 14:25:21.676 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery
> 14-Apr-2010 14:25:21.676 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try
> 14-Apr-2010 14:25:21.676 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query
> 14-Apr-2010 14:25:21.676 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send
> 14-Apr-2010 14:25:21.676 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts,
> disabling EDNS0
> 14-Apr-2010 14:25:21.676 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent
> 14-Apr-2010 14:25:21.676 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected
> 14-Apr-2010 14:25:21.676 resolver: debug 3: resquery 0x940ec38 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone
> 14-Apr-2010 14:25:23.677 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): timeout
> 14-Apr-2010 14:25:23.678 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery
> 14-Apr-2010 14:25:23.678 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): try
> 14-Apr-2010 14:25:23.678 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): query
> 14-Apr-2010 14:25:23.678 resolver: debug 3: resquery 0x94ae7b8 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): send
> 14-Apr-2010 14:25:23.678 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): too many timeouts,
> disabling EDNS0
> 14-Apr-2010 14:25:23.678 resolver: debug 3: resquery 0x94ae7b8 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): sent
> 14-Apr-2010 14:25:23.678 resolver: debug 3: resquery 0x94ae7b8 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): udpconnected
> 14-Apr-2010 14:25:23.678 resolver: debug 3: resquery 0x94ae7b8 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): senddone
> 14-Apr-2010 14:25:23.912 resolver: debug 3: resquery 0x94ae7b8 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): response
> 14-Apr-2010 14:25:23.912 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): noanswer_response
> 14-Apr-2010 14:25:23.912 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): ncache_message
> 14-Apr-2010 14:25:23.912 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): clone_results
> 14-Apr-2010 14:25:23.912 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelquery
> 14-Apr-2010 14:25:23.912 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): done
> 14-Apr-2010 14:25:23.912 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): stopeverything
> 14-Apr-2010 14:25:23.912 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelqueries
> 14-Apr-2010 14:25:23.913 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): sendevents
> 14-Apr-2010 14:25:23.913 resolver: debug 3: fetch 0x94a0b20 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): destroyfetch
> 14-Apr-2010 14:25:23.913 resolver: debug 3: fetch 0x94d54c8 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): destroyfetch
> 14-Apr-2010 14:25:23.913 resolver: debug 3: fetch 0x94ad9c8 (fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A)): destroyfetch
> 14-Apr-2010 14:25:23.914 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): shutdown
> 14-Apr-2010 14:25:23.914 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): doshutdown
> 14-Apr-2010 14:25:23.914 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): stopeverything
> 14-Apr-2010 14:25:23.914 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): cancelqueries
> 14-Apr-2010 14:25:23.914 resolver: debug 3: fctx
> 0x932e140(33.229.242.205.zen.spamhaus.org/A'): destroy
> ---
> As far as I can see, the BIND query simply didn't get a response -
> but no errors?

> ---
> First, someone's going to ask - perhaps Zen's blocking you. I don't
> think so. Here's why.
> -We're non-commercial, using the definition set my spamhaus,
> -mail connects TOTAL are well less than 100K a day. (Less than 10K in
> actuality)
> -and thus having more than 300K queries is pretty unlikely.

> -Also, let me remind you that a restart of the bind service seems to
> make the failures go away for a while, so if zen were blocking our
> queries, I'd think that wouldn't make a difference.

> ---
> I certainly suspect a problem with BIND, but I can't find it, and have
> no idea where to go from here.
> I simply don't know where to look any more. If BIND were having a
> problem, say allocating memory, or something, shouldn't it be in a debug
> level 5 log?

> HELP!

> -Greg

> [Cross posted from elsewhere, but I'm at a dead-end right now, so
> looking for a steer in where to ask, or direct help! TIA]

> _______________________________________________
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