Date: Thu, 6 Jul 2006 10:54:41 -0700 From: perikillo <perikillo@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: Ports doubt, check network performance...? Message-ID: <51d7a5160607061054g110e8461le214c628fedcaffa@mail.gmail.com> In-Reply-To: <200607051112.06066.nvass@teledomenet.gr> References: <51d7a5160607031749n24e8ebe1lfb6d34c2a37e3d10@mail.gmail.com> <200607041041.21582.nvass@teledomenet.gr> <51d7a5160607041601p2ef4da45r6aa2ae9a69d37911@mail.gmail.com> <200607051112.06066.nvass@teledomenet.gr>
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On 7/5/06, Nikos Vassiliadis <nvass@teledomenet.gr> wrote: > On Wednesday 05 July 2006 02:01, perikillo wrote: > > On 7/4/06, Nikos Vassiliadis <nvass@teledomenet.gr> 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...? > > ntop can show how much bandwidth is used by whom > There are many available and I'm not sure ntop is the > best choice. There is pfSense which is a FreeBSD based > live-CD for router-like installations. pfSense has ntop > package. it won't hurt trying it out. > > > , thanks all for > > your help. > > > > Ethereal is for read packets but can he check wich one device is > > causing problems..? > > device causing problems? Do you mean computer using > a lot of bandwidth? You can check this with ntop(and a thousand > others I guess, use google) > Well to find how is causing my loss of packets, iam using ntop right now and ethereal, i try to find out who is causing the lost of packets, any recomendations...? Thanks for your time!!!
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