From owner-freebsd-questions@FreeBSD.ORG Tue Jul 4 23:01:03 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 2BE9E16A4E5 for ; Tue, 4 Jul 2006 23:01:03 +0000 (UTC) (envelope-from perikillo@gmail.com) Received: from ug-out-1314.google.com (ug-out-1314.google.com [66.249.92.170]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1EA4E43D5A for ; Tue, 4 Jul 2006 23:01:01 +0000 (GMT) (envelope-from perikillo@gmail.com) Received: by ug-out-1314.google.com with SMTP id e2so1418723ugf for ; Tue, 04 Jul 2006 16:01:00 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=Q+q7jWMagZ50C6MGBWG2EwMxuE5LMCbu4r0ypfCmQgX9B2i0psvFaSC2/8uG++oaU7QuJbKlsfjwiNZWDOvlmPc9yyQYRmnmShNC8UnzYN4gY4VChQ/+1D/Qu/UbO37Axy5ff2/jByZvlGZ1Pd8uQMJhWvlW/k57Vp6ceYugKrc= Received: by 10.78.177.3 with SMTP id z3mr1431851hue; Tue, 04 Jul 2006 16:01:00 -0700 (PDT) Received: by 10.78.116.7 with HTTP; Tue, 4 Jul 2006 16:01:00 -0700 (PDT) Message-ID: <51d7a5160607041601p2ef4da45r6aa2ae9a69d37911@mail.gmail.com> Date: Tue, 4 Jul 2006 16:01:00 -0700 From: perikillo To: freebsd-questions@freebsd.org In-Reply-To: <200607041041.21582.nvass@teledomenet.gr> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <51d7a5160607031749n24e8ebe1lfb6d34c2a37e3d10@mail.gmail.com> <200607041041.21582.nvass@teledomenet.gr> Subject: Re: Ports doubt, check network performance...? 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: Tue, 04 Jul 2006 23:01:03 -0000 On 7/4/06, Nikos Vassiliadis wrote: > On Tuesday 04 July 2006 03:49, perikillo wrote: > > Hi people. > > > > I have some problems on my network, and i want to use my freebsd > > box to see if i can find the problems on my network, we have two > > networks in two countrys connected by a private link, but i have seen > > just a couple a weeks ago that we have some problems between both > > links, we are lossing packets if i ping some server on the other link, > > some times i get 36% of packets loss, is to but to much on bussines > > hours. > > 36% packet loss is very high, it will almost make TCP unusable. > ping is your tool. Use -s 500 to 1500 to simulate some-how real traffic > situation. I guess you have a point-to-point link between the two offices, > connected to a router? Do you administer these routers? Do know your > bandwidth utilization? Are you sure your link is OK? check this with your > service provider. > > Either you link is bad or you use all your available bandwidth. > > > > > I want to use my freebsd box running 6.0 but just want to know if > > some one could recomend me wich ports to check to see if i can find > > wich device is causing this problem. > > FreeBSD can not help you much with this. Unless FreeBSD is the router > in question. Or you could pass all traffic from a FreeBSD box in order to > know what's going on. something like this > > central-switch------FBSD------router-1=====router-2 > [--------------------LAN--------------------] [-----WAN-----] > > No i dont administer those routers, i need to check if the problem is our network or the ISP link, and yes is Point To Point link and talk with the guys that setup that router, but im thinking in put a freebsd box between our lan and the router and sniff all the traffic and see whats is happening but wich port to use...?, thanks all for your help. Ethereal is for read packets but can he check wich one device is causing problems..? Greetings.