Date: Thu, 29 Aug 2002 14:18:25 -0400 From: "Dan Langille" <dan@langille.org> To: Gregory Neil Shapiro <gshapiro@FreeBSD.ORG> Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: why does this sendmail connection take so long? Message-ID: <3D6E2D31.29065.8EDA44C7@localhost> In-Reply-To: <15726.24717.960548.333189@horsey.gshapiro.net> References: <3D6E243B.1515.8EB744E7@localhost>
next in thread | previous in thread | raw e-mail | index | archive | help
On 29 Aug 2002 at 10:57, Gregory Neil Shapiro wrote:
> dan> xeon.example.org.org. 5S IN A 127.0.0.1
> ^^^^^^^^^^^^^^^^^^^^^
>
> example.org's DNS zone has a mistake if it has an NS record pointing to a
> bogus hostname like that (and what's worse the bogus hostname resolves).
Ugh. The NS entry was missing a trailing period. Thank you.
> dan> dns_getcanonname: trying localhost.example.org (AAAA)
> dan> ;; res_querydomain(localhost, example.org, 1, 28)
> ...
>
> dan> dan@m20.example.org... Connecting to xeon.example.org. via relay...
>
> localhost.example.org appears to map to xeon.example.org, perhaps via
> /etc/hosts?
It did. It no longer does.
> My first suggestion would be to fix your DNS zone as mentioned above.
On a side note, I noticed that localhost-v6.rev was not being used.
I fixed that as well.
> Then, try the test again with more debugging:
>
> echo 'hi there' | /usr/sbin/sendmail -v -d8.8,16.10,61.11 dan@m20.example.org
See "*** delay occurs here" below.
[dan@xeon:/etc/namedb] $ echo 'hi there' | /usr/sbin/sendmail -v -
d8.8,16.10,61.11 dan@m20.example.org
sm_gethostbyname(xeon.example.org, 28)... ;;
res_querydomain(xeon.example.org, <Nil>, 1, 28)
;; res_query(xeon.example.org, 1, 28)
;; res_mkquery(0, xeon.example.org, 1, 28)
;; res_send()
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23051
;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; xeon.example.org, type = AAAA, class = IN
;; Querying server (# 1) address = 127.0.0.1
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23051
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL:
0
;; xeon.example.org, type = AAAA, class = IN
example.org. 1D IN SOA ns1.example.org.
soa.example.org. (
2002082903 ; serial
3H ; refresh
30M ; retry
4w2d ; expiry
1D ) ; minimum
;; rcode = 0, ancount=0
;; res_querydomain(xeon.example.org, example.org, 1, 28)
;; res_query(xeon.example.org.example.org, 1, 28)
;; res_mkquery(0, xeon.example.org.example.org, 1, 28)
;; res_send()
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23052
;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; xeon.example.org.example.org, type = AAAA, class = IN
;; Querying server (# 1) address = 127.0.0.1
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 23052
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL:
0
;; xeon.example.org.example.org, type = AAAA, class = IN
example.org. 1D IN SOA ns1.example.org.
soa.example.org. (
2002082903 ; serial
3H ; refresh
30M ; retry
4w2d ; expiry
1D ) ; minimum
;; rcode = 3, ancount=0
failure
failure
sm_gethostbyname(xeon.example.org, 2)... xeon.example.org
addr: IPv6:c0a8:12::
dns_getcanonname(m20.example.org, trymx=1)
dns_getcanonname: trying m20.example.org. (AAAA)
;; res_querydomain(m20.example.org, , 1, 28)
;; res_query(m20.example.org., 1, 28)
;; res_mkquery(0, m20.example.org., 1, 28)
;; res_send()
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23053
;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; m20.example.org, type = AAAA, class = IN
;; Querying server (# 1) address = 127.0.0.1
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23053
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL:
0
;; m20.example.org, type = AAAA, class = IN
example.org. 1D IN SOA ns1.example.org.
soa.example.org. (
2002082903 ; serial
3H ; refresh
30M ; retry
4w2d ; expiry
1D ) ; minimum
;; rcode = 0, ancount=0
NO: errno=19, h_errno=4
dns_getcanonname: trying m20.example.org. (A)
;; res_querydomain(m20.example.org, , 1, 1)
;; res_query(m20.example.org., 1, 1)
;; res_mkquery(0, m20.example.org., 1, 1)
;; res_send()
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23054
;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; m20.example.org, type = A, class = IN
;; Querying server (# 1) address = 127.0.0.1
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23054
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL:
1
;; m20.example.org, type = A, class = IN
m20.example.org. 1M IN A 216.187.106.227
example.org. 1M IN NS xeon.example.org.
xeon.example.org. 1M IN A 192.168.0.18
YES
dns_getcanonname: m20.example.org
getmxrr([localhost], droplocalhost=1)
dns_getcanonname(localhost, trymx=0)
dns_getcanonname: trying localhost.example.org (AAAA)
;; res_querydomain(localhost, example.org, 1, 28)
;; res_query(localhost.example.org, 1, 28)
;; res_mkquery(0, localhost.example.org, 1, 28)
;; res_send()
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23055
;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; localhost.example.org, type = AAAA, class = IN
;; Querying server (# 1) address = 127.0.0.1
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23055
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL:
0
;; localhost.example.org, type = AAAA, class = IN
example.org. 1D IN SOA ns1.example.org.
soa.example.org. (
2002082903 ; serial
3H ; refresh
30M ; retry
4w2d ; expiry
1D ) ; minimum
;; rcode = 0, ancount=0
NO: errno=19, h_errno=4
dns_getcanonname: trying localhost.example.org (A)
;; res_querydomain(localhost, example.org, 1, 1)
;; res_query(localhost.example.org, 1, 1)
;; res_mkquery(0, localhost.example.org, 1, 1)
;; res_send()
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23056
;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; localhost.example.org, type = A, class = IN
;; Querying server (# 1) address = 127.0.0.1
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23056
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL:
1
;; localhost.example.org, type = A, class = IN
localhost.example.org. 1M IN A 127.0.0.1
example.org. 1M IN NS xeon.example.org.
xeon.example.org. 1M IN A 192.168.0.18
YES
dns_getcanonname: localhost.example.org
dan@m20.example.org... Connecting to localhost.example.org. via
relay...
sm_gethostbyname(localhost.example.org., 28)... ;;
res_querydomain(localhost.example.org., <Nil>, 1, 28)
;; res_query(localhost.example.org, 1, 28)
;; res_mkquery(0, localhost.example.org, 1, 28)
;; res_send()
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23057
;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; localhost.example.org, type = AAAA, class = IN
;; Querying server (# 1) address = 127.0.0.1
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23057
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL:
0
;; localhost.example.org, type = AAAA, class = IN
example.org. 1D IN SOA ns1.example.org.
soa.example.org. (
2002082903 ; serial
3H ; refresh
30M ; retry
4w2d ; expiry
1D ) ; minimum
;; rcode = 0, ancount=0
failure
sm_gethostbyname(localhost, 28)... localhost
alias: localhost.example.org
addr: IPv6:::1
makeconnection (localhost.example.org. [IPv6:::1].25 (28))
makeconnection: fd=6
*** delay occurs here.
Connect failed (Operation timed out with localhost.example.org.);
retrying with AF_INET....
sm_gethostbyname(localhost.example.org., 2)... ;;
res_querydomain(localhost.example.org., <Nil>, 1, 1)
;; res_query(localhost.example.org, 1, 1)
;; res_mkquery(0, localhost.example.org, 1, 1)
;; res_send()
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23058
;; flags: rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; localhost.example.org, type = A, class = IN
;; Querying server (# 1) address = 127.0.0.1
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 23058
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL:
1
;; localhost.example.org, type = A, class = IN
localhost.example.org. 1M IN A 127.0.0.1
example.org. 1M IN NS xeon.example.org.
xeon.example.org. 1M IN A 192.168.0.18
localhost.example.org
addr: IPv6:7f00:1::
makeconnection (localhost.example.org. [127.0.0.1].25 (2))
makeconnection: fd=6
220 xeon.example.org ESMTP Sendmail 8.12.5/8.12.5; Thu, 29 Aug 2002
14:13:31 -0400 (EDT)
>>> EHLO xeon.example.org
250-xeon.example.org Hello localhost [127.0.0.1], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-DELIVERBY
250 HELP
>>> MAIL From:<dan@xeon.example.org> SIZE=9
250 2.1.0 <dan@xeon.example.org>... Sender ok
>>> RCPT To:<dan@m20.example.org>
>>> DATA
250 2.1.5 <dan@m20.example.org>... Recipient ok
354 Enter mail, end with "." on a line by itself
>>> .
250 2.0.0 g7TIDVRq084370 Message accepted for delivery
dan@m20.example.org... Sent (g7TIDVRq084370 Message accepted for
delivery)
Closing connection to localhost.example.org.
>>> QUIT
221 2.0.0 xeon.example.org closing connection
[dan@xeon:/etc/namedb] $
Thank you.
--
Dan Langille
I'm looking for a computer job:
http://www.freebsddiary.org/dan_langille.php
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-hackers" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?3D6E2D31.29065.8EDA44C7>