From owner-freebsd-questions@FreeBSD.ORG Sat Apr 4 01:45:43 2009 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 7BC7A106564A for ; Sat, 4 Apr 2009 01:45:43 +0000 (UTC) (envelope-from anujhere@gmail.com) Received: from mail-gx0-f224.google.com (mail-gx0-f224.google.com [209.85.217.224]) by mx1.freebsd.org (Postfix) with ESMTP id 36E838FC0A for ; Sat, 4 Apr 2009 01:45:43 +0000 (UTC) (envelope-from anujhere@gmail.com) Received: by gxk24 with SMTP id 24so3877100gxk.19 for ; Fri, 03 Apr 2009 18:45:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:in-reply-to:references :date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=x10+qtjD9NSxAE74rll67gK7FNmw2jJWvd66DDRRguY=; b=JP84YuArleAU5UP2XLRwQo9V5XctA2CU0vQQAfIz2BYkzujKKA/2Z3zaRbGQ8kH0M4 qCPLMeMcuQiRa9hSnJBCm1QGpsU4XBnOAECZWUjWWZn1RFa84aN4Ip2rNygSP6701+7W d8VUjC34x4TE6pvO9M8Yv+/K5LoZ4/F8Uj/w0= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=a/yNoqIKiBREyREFoHXoZXatYkGi8zrPwBPhbCdGrR+fLAyMgZESsG3v4ZLzlAlGpW EMZnOMBlg+36m1XjjeYOeHhQ+7WuQVPaGHfCoTJDmXW/DKX2oByk6V/df4bHLHOMcEVw skCj1NP2s+3xbNXe7RpnqpaKuik16MCXwDcOo= MIME-Version: 1.0 Received: by 10.150.51.2 with SMTP id y2mr1958951yby.227.1238809542696; Fri, 03 Apr 2009 18:45:42 -0700 (PDT) In-Reply-To: <2270680C-DB97-4291-95F0-73FFE436B636@shockergroup.com> References: <3120c9e30904031611l668e27f6vaf5ff6be15510f47@mail.gmail.com> <2270680C-DB97-4291-95F0-73FFE436B636@shockergroup.com> Date: Sat, 4 Apr 2009 07:15:42 +0530 Message-ID: <3120c9e30904031845i3d91fd70k539019267ce9e053@mail.gmail.com> From: Anuj Singh To: Tom Ierna Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: mac arp moved from-to DOS? 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: Sat, 04 Apr 2009 01:45:43 -0000 I am trying to find out the cause of no reply from the freebsd machine, and why did it responded after restarting the network services? The machine with 10.139.7.15 is some windows machine in network. So logs which i have here can not cause FreeBSD machine to stop responding to the network traffic? what can be other causes on the OS level? Another thing I want to ask whether the default values of kernel parameters are good enough for production level server, or we can make some other changes to it. Currently I am running clamav--->c-icap---->squid--->dansgurdain on this server.. since last few weeks I never faced such problem..and don't want to follow the alt+ctrl+del=widows methods of restarting server or any service Thanks & Regards Anuj Singh On 4/3/09, Tom Ierna wrote: > On Apr 3, 2009, at 7:11 PM, Anuj Singh wrote: >> 4 03:23:19 fbsd7 kernel: arp: 10.139.7.15 moved from 00:22:19:ae:ea:0d >> to 00:22:19:ae:ea:0f on age0 >> Apr 4 03:23:19 fbsd7 kernel: arp: 10.139.7.15 moved from >> 00:22:19:ae:ea:0f to 00:22:19:ae:ea:0d on age0 >> >> 10.139.7.15 is some windows machine... > > > Does this Windows machine have two Ethernet cards plugged into the > same network? > > It looks like your FreeBSD machine is seeing that IP address switch > between two MAC addresses. > > This can be indicative of a network loop between the interfaces on the > machine with that IP address, or a DHCP client fight. > > I've also seen this (harmlessly) manifest with certain FreeBSD > firewalls in bridged mode. > > -Tom > >