From owner-freebsd-stable@freebsd.org  Sun Oct 18 12:04:09 2015
Return-Path: <owner-freebsd-stable@freebsd.org>
Delivered-To: freebsd-stable@mailman.ysv.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by mailman.ysv.freebsd.org (Postfix) with ESMTP id C06F2A11B6A
 for <freebsd-stable@mailman.ysv.freebsd.org>;
 Sun, 18 Oct 2015 12:04:09 +0000 (UTC)
 (envelope-from freebsd-stable@m.gmane.org)
Received: from plane.gmane.org (plane.gmane.org [80.91.229.3])
 (using TLSv1 with cipher AES256-SHA (256/256 bits))
 (Client did not present a certificate)
 by mx1.freebsd.org (Postfix) with ESMTPS id 83F2A13E4
 for <freebsd-stable@freebsd.org>; Sun, 18 Oct 2015 12:04:09 +0000 (UTC)
 (envelope-from freebsd-stable@m.gmane.org)
Received: from list by plane.gmane.org with local (Exim 4.69)
 (envelope-from <freebsd-stable@m.gmane.org>) id 1Znmgy-0000gL-AU
 for freebsd-stable@freebsd.org; Sun, 18 Oct 2015 14:04:00 +0200
Received: from host-89-228-168-77.dynamic.mm.pl ([89.228.168.77])
 by main.gmane.org with esmtp (Gmexim 0.1 (Debian))
 id 1AlnuQ-0007hv-00
 for <freebsd-stable@freebsd.org>; Sun, 18 Oct 2015 14:04:00 +0200
Received: from mwisnicki+freebsd by host-89-228-168-77.dynamic.mm.pl with
 local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00
 for <freebsd-stable@freebsd.org>; Sun, 18 Oct 2015 14:04:00 +0200
X-Injected-Via-Gmane: http://gmane.org/
To: freebsd-stable@freebsd.org
From: Marcin Wisnicki <mwisnicki+freebsd@gmail.com>
Subject: Can't get ntp to work
Date: Sun, 18 Oct 2015 12:03:47 +0000 (UTC)
Lines: 28
Message-ID: <n001r3$oql$1@ger.gmane.org>
Mime-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
X-Complaints-To: usenet@ger.gmane.org
X-Gmane-NNTP-Posting-Host: host-89-228-168-77.dynamic.mm.pl
User-Agent: Pan/0.140 (Chocolate Salty Balls; Unknown)
X-BeenThere: freebsd-stable@freebsd.org
X-Mailman-Version: 2.1.20
Precedence: list
List-Id: Production branch of FreeBSD source code <freebsd-stable.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/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: <https://lists.freebsd.org/mailman/listinfo/freebsd-stable>,
 <mailto:freebsd-stable-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 18 Oct 2015 12:04:09 -0000

My ntpd stopped synchronizing clock sometime ago (default ntp.conf).

To debug the problem I've tried running ntpdate and got strange results:

> # ntpdate 0.freebsd.pool.ntp.org
> 18 Oct 13:53:14 ntpdate[55102]: no server suitable for synchronization found
>	
> # ntpdate -u 0.freebsd.pool.ntp.org
> 18 Oct 13:53:19 ntpdate[55119]: adjust time server 193.25.222.240 offset 0.002672 sec


This would point to broken firewall BUT:

> # nmap -p123 -sU 0.freebsd.pool.ntp.org
> 
> Starting Nmap 6.49BETA5 ( https://nmap.org ) at 2015-10-18 13:52 CEST
> Nmap scan report for 0.freebsd.pool.ntp.org (193.25.222.240)
> Host is up (0.027s latency).
> Other addresses for 0.freebsd.pool.ntp.org (not scanned): 94.154.96.7 95.158.95.123 46.175.224.7
> rDNS record for 193.25.222.240: afrodyta.complex.net.pl
> PORT    STATE SERVICE
> 123/udp open  ntp
> 
> Nmap done: 1 IP address (1 host up) scanned in 0.64 seconds

So there is nothing blocking the traffic.

Any ideas ?