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    How to set port mirroring?

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    • J
      jilingshu last edited by

      hi all,
      I wanna set a port mirroring to monitor all traffic in LAN interface. I have searched this forum and found someone said I can use "dup-to" to do this(http://forum.pfsense.org/index.php?action=printpage;topic=14334.0). But he said no details. So could u tell me some more information on this? thx!

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      • 0
        0tt0 last edited by

        @jilingshu:

        hi all,
        I wanna set a port mirroring to monitor all traffic in LAN interface. I have searched this forum and found someone said I can use "dup-to" to do this(http://forum.pfsense.org/index.php?action=printpage;topic=14334.0). But he said no details. So could u tell me some more information on this? thx!

        Kinda interesting, but I wouldn't burden the firewall with that, have the switch do the work if possible.

        http://en.wikipedia.org/wiki/Port_mirroring

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        • Cry Havok
          Cry Havok last edited by

          Or install a network tap - you can even find information on building them.

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          • M
            MarcoP last edited by

            Nice article, indeed.

            Where I live, building the tap will cost around $80, $100;
            a ProCurve 8 ports managed switch with port mirroring will only cost $110, $140 ;)

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            • J
              jilingshu last edited by

              @0tt0:

              @jilingshu:

              hi all,
              I wanna set a port mirroring to monitor all traffic in LAN interface. I have searched this forum and found someone said I can use "dup-to" to do this(http://forum.pfsense.org/index.php?action=printpage;topic=14334.0). But he said no details. So could u tell me some more information on this? thx!

              Kinda interesting, but I wouldn't burden the firewall with that, have the switch do the work if possible.

              http://en.wikipedia.org/wiki/Port_mirroring

              hi,
              The problem is that I have no switch with port mirroring function… My switch is so cheap(50RMB, about $7) to have any functions except connecting all computers together...

              I only need to sniff traffic between LAN and WAN so I think make a port mirroring my firewall is suitable. ;)

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