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    ARPing

    Scheduled Pinned Locked Moved General pfSense Questions
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    • J
      Jumbosausage
      last edited by

      I'm just using the Arping tool in services. There's no option to let it run, I'm basically just entering different IP's of hosts on my network and they all come back as above.

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      • stephenw10S
        stephenw10 Netgate Administrator
        last edited by

        Try running it at the command line:

        [2.1.5-RELEASE][root@pfsense.fire.box]/root(5): arping 192.168.4.13
        ARPING 192.168.4.13
        60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=0 time=249.147 usec
        60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=1 time=7.868 usec
        60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=2 time=5.960 usec
        60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=3 time=10.014 usec
        60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=4 time=7.153 usec
        60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=5 time=11.921 usec
        60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=6 time=10.967 usec
        60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=7 time=12.159 usec
        60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=8 time=7.153 usec
        60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=9 time=7.153 usec
        60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=10 time=9.060 usec
        60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=11 time=6.199 usec
        ^C
        --- 192.168.4.13 statistics ---
        13 packets transmitted, 12 packets received,   8% unanswered (0 extra)
        
        

        I'm seeing one lost probe both at the CLI and GUI.

        Arping first sends a broadcast packet and then unicast packets which I assume explains the initial much longer response time.

        Steve

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        • stephenw10S
          stephenw10 Netgate Administrator
          last edited by

          Interersting, if you do this:

          [2.1.5-RELEASE][root@pfsense.fire.box]/root(21): arping -c 10 -u 192.168.4.13
          ARPING 192.168.4.13
          60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=0/0 time=274.181 usec
          60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=1/2 time=6.199 usec
          60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=2/3 time=6.914 usec
          60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=3/4 time=5.960 usec
          60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=4/5 time=7.868 usec
          60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=5/6 time=5.960 usec
          60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=6/7 time=5.960 usec
          60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=7/8 time=7.153 usec
          60 bytes from 00:13:d4:1b:b8:da (192.168.4.13): index=8/9 time=5.960 usec
          
          --- 192.168.4.13 statistics ---
          10 packets transmitted, 9 packets received,  10% unanswered (0 extra)
          
          

          You can see it's actually the second packet sent (send index 1) that isn't replied to.

          Steve

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          • J
            Jumbosausage
            last edited by

            How do I stop it arping? lol

            I've typed arping 192.168.1.16 from a telnet session and I can't stop it now.

            Ok had to reboot to stop it, is there a command to only do a few lines, the arping -c 10 -u command wouldn't work for me for some reason.

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            • stephenw10S
              stephenw10 Netgate Administrator
              last edited by

              Ctrl+C to stop it. That's what the '^C' is in my output.
              I forget, are you running 2.1.5 or 2.2?

              Steve

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              • J
                Jumbosausage
                last edited by

                Yes it just looks as though every time there's a packet dropped but it would make sense i suppose if it's the initial packet that's transmitted. So I guess this looks ok?

                Capture.PNG
                Capture.PNG_thumb

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                • stephenw10S
                  stephenw10 Netgate Administrator
                  last edited by

                  Well it looks the same as I'm seeing, whether that's ok or not…...  ;)
                  As I said above using the '-u' switch it looks like the second packet that fails. I have no explanaition for that. The first or last packets would seem more likely suspects. The first unicast packet?  :-\

                  Steve

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                  • J
                    Jumbosausage
                    last edited by

                    I think I'm almost there with everything I need it to do now. I've managed to get OpenVPN setup along with IPVanish today. It's taken me literally all weekend but I've now got specific traffic such as my torrent server and FreeNAS system all going out through a separate VPN gateway. My PC and laptop connect through the normal WAN interface.

                    I've made sure I've got a back up of the config, I'd hate to have to start from scratch again, I don't actually know how or what settings got some of the services working!  :o

                    I'm going to continue playing around with it though there's more I want to learn, although I've already realised my box isn't powerful enough for what I'm going to need. I guess it's fine for the basics, firewall and NAT stuff but now I've got openvpn and also snort installed, the cpu usage is maxed out at 100% and I'm also seeing latency on the VPN gateway. It's only got a Intel Celeron M processor 600MHz, with 2gb ddr2 ram, although the memory seems sufficient.

                    Anyway, thanks for all your help Stephen, it's been spot on and also much appreciated. I'm sure I'll be back with more questions in the near future  ;D

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                    • johnpozJ
                      johnpoz LAYER 8 Global Moderator
                      last edited by

                      So using the arping under services.. I have pinged multiple physical machines, multiple vms on multiple segments even and not seeing any losses.

                      I am on the 2.2 snapshot as of yesterday..

                      arppingnoloss.png
                      arppingnoloss.png_thumb

                      An intelligent man is sometimes forced to be drunk to spend time with his fools
                      If you get confused: Listen to the Music Play
                      Please don't Chat/PM me for help, unless mod related
                      SG-4860 24.11 | Lab VMs 2.8, 24.11

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                      • J
                        Jumbosausage
                        last edited by

                        I've just updated to 2.2 and it seems to have resolved it.

                        Capture.PNG
                        Capture.PNG_thumb

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