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    Guests with no IP?

    Scheduled Pinned Locked Moved Wireless
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    • S
      senser
      last edited by

      Greetings,
      I am running an open wifi (AP connected via opt2, with pfsense running the dhcp server for wireless clients). More often than not the AP reports more active clients (via snmp) than there are active DHCP leases, suggesting that there are people connected without an IP.

      Like currently there is one active DHCP lease and me using the network. But the AP reports three connected devices. There are times where the numbers match, so there is no observation error.

      Why is that? I am sure there is a technical explaination that I am just lacking the knowledge to explain.
      Thank you.

      We use the mighty pf, we cannot be fooled.

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      • jimpJ
        jimp Rebel Alliance Developer Netgate
        last edited by

        It could be people connecting with the wrong key. I know at times my laptop has reported that it was associated, even though I mistyped the key, but I'd get no network data since it was all dropped.

        If your AP can give more detailed logging (syslog, perhaps) you might be able to monitor that a bit closer and solve the mystery.

        If they just couldn't pull from DHCP, most things would still choose a link-local IP (169.254.x.x) which may be seen by the AP.

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        • S
          senser
          last edited by

          The network is passwordless. So no option 1.
          For the case where they can't get an IP via DHCP, their connection would be useless (at least for connecting to the internet), as I filter all non-LAN IP traffic. Still, the devices keep being connected for a long time suggesting they are not being used. But - automatically established connections would always try DHCP, right?

          Maybe some people just chose a static IP in the DHCP range?
          Haven't had a chance to look into the AP logs yet.

          We use the mighty pf, we cannot be fooled.

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          • panzP
            panz
            last edited by

            @senser:

            Maybe some people just chose a static IP in the DHCP range?

            Oh yeah!  ;D

            pfSense 2.3.2-RELEASE-p1 (amd64)
            motherboard: MSI C847MS-E33 Micro ATX (with Intel Celeron CPU 847 @ 1.10 GHz) ~ PSU: Corsair VS350 ~ RAM: Kingston KVR1333D3E9S 4096 MB 240-pin DIMM DDR3 SDRAM 1.5 volt ~ NIC: Intel EXPI9301CTBLK (LAN) ~ NIC: D-Link DFE-528TX (CAM) ~ Hard Disk: Western Digital WD10JFCX Red ~ Case: Cooler Master HAF XB ~ power consumption: 21 Watts.

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            • K
              kejianshi
              last edited by

              Check ARP.

              1 Reply Last reply Reply Quote 0
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