Re: [fw-wiz] Sniffing DSL Connection

From: Ben Nagy (ben_at_iagu.net)
Date: 09/14/03

  • Next message: Christopher Hicks: "Re: [fw-wiz] tests about latency" 
    To: firewall-wizards@honor.icsalabs.com
Date: Sun, 14 Sep 2003 18:58:34 +0200

    On Fri, 12 Sep 2003 10:45:57 -0400
    Jeff_Lopes@groove.net wrote:

    > My home network setup is quite common. It is as follows:
    >
    > DSL Modem ---> Linksys Router ---> Internal Machines
    >
    > In an attempt to sniff traffic going to and from the linksys router ... I
    > added a hub:
    >
    > DSL Modem ---> Hub ---> Linksys Router ---> Internal Machines
    >
    > I then put a Linux machine on the hub and ran ethereal. No traffic!
    >
    > Any thoughts?
    >
    > Jeff

    Network goblins. Nasty little buggers.

    You could try looking at the front of the hub and see if the widdle lights are flashing?

    Seriously - it's hard for me to restrain my natural tendancy to sarcasm when you don't give us any indication that you've done even basic troubleshooting

    Try with tcpdump, make sure you have the privs to put the interface into promiscuous mode. Try the same thing with the linux box and hub inside the Linksys. Verify that you can sniff your own and broadcast traffic before worrying about other stuff. And I'm not altogether kidding about the widdle lights - verify your layer 2 connectivity if you are stumped.

    ben
    _______________________________________________
    firewall-wizards mailing list
    firewall-wizards@honor.icsalabs.com
    http://honor.icsalabs.com/mailman/listinfo/firewall-wizards

  • Next message: Christopher Hicks: "Re: [fw-wiz] tests about latency"

    Relevant Pages

    • Re: [fw-wiz] Sniffing DSL Connection
      ... > In an attempt to sniff traffic going to and from the linksys router ... ... > I then put a Linux machine on the hub and ran ethereal. ... Do you have a real IP address from the DSL modem, or does your Linksys do PPPOE? ... If you multihome the Linux machine, you should be able to do PPPOE on one ...
      (Firewall-Wizards)
    • Re: host cant attach to small network
      ... > linksys router. ... Be careful about using the uplink port on the hub. ... chaining another hub or switch. ...
      (comp.os.linux.networking)
    • Windows 2003 Enterprise Server as external ip router?
      ... I have 8 ips assigned by my isp, I want to use some of them for web hosting ... Currently I have a Linksys router which is handling my internet ... DSL Modem to nic number 1, nic number 2 to a hub and the ... Can W2K3 do the routing? ...
      (microsoft.public.windows.server.networking)
    • [fw-wiz] Sniffing DSL Connection
      ... My home network setup is quite common. ... In an attempt to sniff traffic going to and from the linksys router ... ... I then put a Linux machine on the hub and ran ethereal. ...
      (Firewall-Wizards)
    • Re: Spoke Length: Measurement Methology And Criticality?
      ... pull a spoke from the rim that I'm going to replace the hub ... Easy enough to get the hub and rim specs, ... i will restrain myself. ...
      (rec.bicycles.tech)