Networks background traffic between modem and router

Discussion in 'Hardware' started by RTT, 1 Dec 2003.

  1. RTT

    RTT #parp

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    Kind of a strange question - what would be an 'acceptable' level of background traffic between a modem & router overnight, when none of my machines are using the connection?

    Because at present, my modem is constantly pulling down 7.5k/s of traffic downstream, which is near 15% of my total downstream bandwidth.

    [​IMG]

    (2 -> 9am inparticular)
     
    RTT, 1 Dec 2003
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  2. Bluebark

    Bluebark What's a Dremel?

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    Are all of you're systems turned off when this is happening?

    Where's the sniffer sitting?
     
    Bluebark, 2 Dec 2003
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  3. Supercool

    Supercool Gone.

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    Mine averages at 5-8Kbytes/s all night when it's idle, I know my servers call home every so often to check the ping times network connectivity from the US to the UK and back again, but that dosen't take a constant 5KBps, I get the odd spike when a s©ript kiddie tries to DoS me but thats only occasionally :)
     
    Supercool, 2 Dec 2003
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  4. RTT

    RTT #parp

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    i'm monitoring this from my slackware box, but I know this bandwidth isn't due to the monitoring (the monitoring transfers about 180bytes of traffic each 5 mins) as the graph i posted up there is strictly between the router and the modem, and isn't being passed onto other machines.

    I'm sure it's no problem, but a lot more than I expected :)
     
    RTT, 2 Dec 2003
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  5. NuTech

    NuTech Minimodder

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    Slightly off topic, but how do you monitor traffic between a modem and a router (specifically the router's WAN port)?

    My modem is an ethernet modem plugged directly into the WAN port of my Buffalo Airstation router.

    Cheers.
     
    NuTech, 2 Dec 2003
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  6. ChriX

    ChriX ^

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    Rich, mine does that 24/7, really screws up my pings. Run tcpdump on your slackware box and see whats going on, look at my thread to see if it's the same...
     
    ChriX, 2 Dec 2003
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  7. ChriX

    ChriX ^

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    ChriX, 2 Dec 2003
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  8. RTT

    RTT #parp

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    mrtg

    chrix - its a netgear router, not a linux/pc acting as a router, so the possibility of actually finding out what the traffic is, is 0 :)
     
    RTT, 2 Dec 2003
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  9. Bluebark

    Bluebark What's a Dremel?

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    Do you have access to a sniffer that you can drop between the router and modem?
     
    Bluebark, 2 Dec 2003
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  10. RTT

    RTT #parp

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    Unfortunately not, though i have decided that i'm going to properly secure my linux box (its only secure at the moment for LAN use, not 'open internet' use) and plug it into my modem overnight sometime...
     
    RTT, 2 Dec 2003
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  11. Bluebark

    Bluebark What's a Dremel?

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    So you're going to put the L box in place of the router? Or are you going to setup the L box as a sniffer between the modem and the router using anothe nick?
     
    Bluebark, 2 Dec 2003
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  12. ChriX

    ChriX ^

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    Rich, you're monitoring the interface on your Linux box with mrtg though arent you? tcpdump shows everything going through that interface so it should show it...
     
    ChriX, 2 Dec 2003
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