From owner-freebsd-questions@FreeBSD.ORG Thu May 5 09:00:23 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id CBAD2106566C for ; Thu, 5 May 2011 09:00:23 +0000 (UTC) (envelope-from f.bonnet@esiee.fr) Received: from hp9.esiee.fr (hp9.esiee.fr [147.215.1.4]) by mx1.freebsd.org (Postfix) with ESMTP id 87F648FC1D for ; Thu, 5 May 2011 09:00:23 +0000 (UTC) Received: by hp9.esiee.fr (Postfix, from userid 125) id A2C554179C3; Thu, 5 May 2011 11:00:26 +0200 (CEST) Received: from mail.esiee.fr (mail.esiee.fr [147.215.1.3]) by hp9.esiee.fr (Postfix) with ESMTP id 98A78417971 for ; Thu, 5 May 2011 10:44:14 +0200 (CEST) X-DKIM: OpenDKIM Filter v2.2.2 hp9.esiee.fr 98A78417971 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=esiee.fr; s=MAILOUT; t=1304585054; bh=1QOp7riBGjY9I9nya2rTFF5oUCalox5Ua6LTaj4Q8AQ=; h=Message-ID:Date:From:MIME-Version:To:Subject:Content-Type: Content-Transfer-Encoding; b=fqQq1Xksa3Rls83xUT3jKlN5S1hCSLOtd58qQwcDSf9J8QTlH3qArxuiH33onavmu 33HKmq7sgpijqs6nNABF9eiEwEZJyZqgSTIRbkzWVNWzmaJapCjWrGxSNCWUMqW3+U LPBJkH9Ya67AIUMfS4jT8NEftLS3TW7f1bAuFxWQ= Received: from mail (localhost [127.0.0.1]) by VAMS.dummy (Postfix) with SMTP id 7EE20105443A for ; Thu, 5 May 2011 10:44:14 +0200 (CEST) Received: from [147.215.1.21] (lisa.esiee.fr [147.215.1.21]) by mail.esiee.fr (Postfix) with ESMTP id 76589105441E for ; Thu, 5 May 2011 10:44:14 +0200 (CEST) Message-ID: <4DC2635E.5010506@esiee.fr> Date: Thu, 05 May 2011 10:44:14 +0200 From: Frank Bonnet User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.17) Gecko/20110414 Lightning/1.0b2 Thunderbird/3.1.10 MIME-Version: 1.0 To: freebsd-questions@freebsd.org Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Problem when swapping two IP addresses machines X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 05 May 2011 09:00:23 -0000 Hello Yesterday I swapped the IP addresses of two machines ( new and old mail server ). After I rebooted the two machines I was unable to join our DNS server ( even to ping it ) I suspect the DNS was keeping the IP / MAC address mapping of the two swapped machines , so I flushed the ARP cache but it was still impossible to join the DNS from the concerned machines. I have to reboot the DNS Server to be able to ping it and use it again. The DNS server runs FreeBSD 8.0-RELEASE-p4. Thanks for any infos.