network traffic monitor

Discussion in 'Linux & BSD' started by LordOfLA, Aug 15, 2008.

  1. LordOfLA

    LordOfLA Godlike!

    Messages:
    7,027
    Location:
    Maidenhead, Berkshire, UK
    Hey!

    Anyone know of anything I can drop on a linux/bsd box that will listen in promiscuous mode and tell me where all my bandwidth is going?

    I seem to be leaking bandwidth and need to find out where to and why.
     
  2. fitz

    fitz Just Floating Along Staff Member Political User Folding Team

    Messages:
    4,076
    Location:
    Chicagoland
    ntop
     
    Last edited: Aug 15, 2008
  3. X-Istence

    X-Istence * Political User

    Messages:
    6,498
    Location:
    USA
    Or if you need something that is on the command line: iftop.
     
  4. LordOfLA

    LordOfLA Godlike!

    Messages:
    7,027
    Location:
    Maidenhead, Berkshire, UK
    just something that will give me a web-based overview of which of my machines is shifting what traffic to where.

    I have a 12/2mbit dsl connection and my switch was going nuts yesterday. Since I use bridged DSL all the modem tells me is that I'm pushing traffic which I already know :)
     
  5. fitz

    fitz Just Floating Along Staff Member Political User Folding Team

    Messages:
    4,076
    Location:
    Chicagoland
    Ntop has a web interface which will show you the traffic it sees..

    this is assuming you can set your switch up with a span/mirror port for whatever utility you use to see all the traffic.
     
  6. X-Istence

    X-Istence * Political User

    Messages:
    6,498
    Location:
    USA
    Or you can put a bridged machine in the middle and give the bridge no IP addresses, have it just shift traffic.
     
  7. LordOfLA

    LordOfLA Godlike!

    Messages:
    7,027
    Location:
    Maidenhead, Berkshire, UK
    I still have the pfsense machine here. Trouble is it kills the voip phone on my desk that I use for work. I could fart about with that over the weekend and see if I can't stop leaking bandwidth everywhere.
     
  8. X-Istence

    X-Istence * Political User

    Messages:
    6,498
    Location:
    USA
    How does it kill it?
     
  9. LordOfLA

    LordOfLA Godlike!

    Messages:
    7,027
    Location:
    Maidenhead, Berkshire, UK
    randomly drops the connection. - the phone will think its still connected, but the phone server won't be able to communicate with it. Thats with an any to any mapping for the phones public IP.
     
  10. X-Istence

    X-Istence * Political User

    Messages:
    6,498
    Location:
    USA