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Date: Tue, 15 Jul 2003 10:17:52 -0700 (PDT)
From: David Malone <dwmalone@FreeBSD.org>
Message-Id: <200307151717.h6FHHqXi081022@freefall.freebsd.org>
To: bpatin@padecs.riss.net, dwmalone@FreeBSD.org,
	freebsd-bugs@FreeBSD.org
Subject: Re: bin/44570: ftp behind VPN server fails host name lookup
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Synopsis: ftp behind VPN server fails host name lookup

State-Changed-From-To: feedback->closed
State-Changed-By: dwmalone
State-Changed-When: Tue Jul 15 10:12:45 PDT 2003
State-Changed-Why: 
This seems to be a bug in the name servers at the other end.

ftp.perl.org is an alias for ftp.cpan.ddns.develooper.com. The DNS
servers for that domain seem to be 142.132.1.82, 193.111.120.45 and
64.70.54.97.

The first of these doesn't respond. The other two claim that the
domain ftp.cpan.ddns.develooper.com doesn't exist if you ask them
for a AAAA record, but claims it does exist if you ask it for an A
record. Your local name server is caching the "doesn't exist"
response from the AAAA record.

You need to ask the people who run these name servers to fix them
so it returns 0 records when asked for a AAAA record, rather than
"no such domain". (See the dig commands below for the wrong and
right responses...)

	David.

% dig AAAA ftp.cpan.ddns.develooper.com @193.111.120.45 | fgrep status
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 24551
% dig A ftp.cpan.ddns.develooper.com @193.111.120.45 | fgrep status
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 61084
% dig AAAA ftp.cpan.ddns.develooper.com @64.70.54.97 | fgrep status
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 62794
% dig A ftp.cpan.ddns.develooper.com @64.70.54.97 | fgrep status
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58525

% dig AAAA freefall.freebsd.org @216.136.204.126 | fgrep status
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 54053

http://www.freebsd.org/cgi/query-pr.cgi?pr=44570