gateway - How can i monitor internet traffic in my LAN?

24
2014-07
  • 3a2roub

    I have a centOS box set up as a gateway with IPTables (among many things such as proxy cache using Squid). My LAN consists of ~30 machines, all connect to the internet through the gateway's eth0 (which is the only computer connected to the DSL modem - via eth1).

    Facing a monthyl download quota, I installed bandwidthd on the gateway to monitor the PC's bandwidth use, and set to monitor eth0.

    All the network traffic coming to the gateway is forwarded to port 3128 for Squid to handle, but on bandwidthd it doesnt seem to be accurate. For instance, a 3.3 MB download on one of the computers after starting bandwidthd states 4.8 M for that computer under HTTP. I understand that by monitoring eth0 I'm monitoring all network activity and not just internet usage (port 80, etc..), but isn't the HTTP tab in bandwidthd relevant to packets on port 80 or internet usage?

    I need to know how much of the internet download quota each IP used on a daily basis. What to do :) ?

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    Related Question

    bandwidth - Network Traffic Monitoring
  • Brent

    What is the best tool to monitor/analyze network traffic on an entire network (several subnets)?

    I'm looking for something that will help me toubleshoot bandwidth problems when, for instance, users start complaining that the "network is slow"


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