From owner-freebsd-stable@FreeBSD.ORG  Tue Nov 21 17:16:02 2006
Return-Path: <owner-freebsd-stable@FreeBSD.ORG>
X-Original-To: freebsd-stable@freebsd.org
Delivered-To: freebsd-stable@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 28A0016A4A7
	for <freebsd-stable@freebsd.org>; Tue, 21 Nov 2006 17:16:02 +0000 (UTC)
	(envelope-from sthalik@tehran.lain.pl)
Received: from mail.in5.pl (rollercoaster.insane.pl [213.251.173.13])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 7620944136
	for <freebsd-stable@freebsd.org>; Tue, 21 Nov 2006 17:06:10 +0000 (GMT)
	(envelope-from sthalik@tehran.lain.pl)
Received: from c182-250.icpnet.pl ([85.221.182.250] helo=enkidu.local)
	by mail.in5.pl with esmtpsa (TLS-1.0:RSA_AES_256_CBC_SHA1:32)
	(envelope-from <sthalik@tehran.lain.pl>) id 1GmZ4j-0007WS-BC
	for freebsd-stable@freebsd.org; Tue, 21 Nov 2006 18:06:25 +0100
Received: from sthalik by enkidu.local with local (Exim 4.63)
	(envelope-from <sthalik@tehran.lain.pl>) id 1GmZ4f-0001Pm-9A
	for freebsd-stable@freebsd.org; Tue, 21 Nov 2006 18:06:21 +0100
Date: Tue, 21 Nov 2006 18:06:21 +0100
From: Stanislaw Halik <sthalik@tehran.lain.pl>
To: freebsd-stable@freebsd.org
Message-ID: <20061121170621.GA5216@localhost.localdomain>
Mail-Followup-To: freebsd-stable@freebsd.org
References: <d8a4930a0611210211q4920bfdkf7f0400c69df2689@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <d8a4930a0611210211q4920bfdkf7f0400c69df2689@mail.gmail.com>
User-Agent: Mutt/1.5.13 (2006-08-11)
X-User: sthalik
Subject: Re: sshd. "UseDNS no" ignored?
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>, 
	<mailto:freebsd-stable-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-stable>
List-Post: <mailto:freebsd-stable@freebsd.org>
List-Help: <mailto:freebsd-stable-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
	<mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 21 Nov 2006 17:16:02 -0000

On Tue, Nov 21, 2006, Cristiano Deana wrote:
> # uname -a
> FreeBSD circe.cmp 6.2-PRERELEASE FreeBSD 6.2-PRERELEASE #0: Wed Nov 15
> 16:13:14 CET 2006     root@circe.cmp:/usr/obj/usr/src/sys/PAECMP  i386
> # grep UseDNS /etc/ssh/sshd_config
> UseDNS no
> # /etc/rc.d/sshd restart
> Stopping sshd.
> Starting sshd.

> now, start a ssh session from a client (192.168.7.8). my sshd machine
> is 192.168.18.3 and 192.168.18.251is the dns.

> # tcpdump -ni bce0 port 53
> tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
> listening on bce0, link-type EN10MB (Ethernet), capture size 96 bytes
> 11:07:52.069663 IP 192.168.18.3.60321 > 192.168.18.251.53:  48923+
> PTR? 8.7.168.192.in-addr.arpa. (42)
[snip]

A wild guess: tcpwrappers are enabled, perhaps?