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    DHCPREQUEST wrong network???

    Scheduled Pinned Locked Moved General pfSense Questions
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    • D
      dad311
      last edited by

      I have a Proxmox server running a virtual  Pfsense 2.4 on my small home network.

      I have some devices ( most all ESP8266 wireless type devices) that fail to get a dhcp address.  I see the follwoing message in the log file:

      DHCPREQUEST for 192.168.1.14 (192.168.1.1) from 5c:cf:7f:b7:61:71 via vtnet1: wrong network.

      My home network is 192.168.100.0,  IF understrand correctly somehow this request is coming from 192.168.1.0 network? I did a nmap scan of my netrwork, there is only 1 dhcp server.

      Im not even sure how this is possible, could someone shed some light on this???  thx.

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      • stephenw10S
        stephenw10 Netgate Administrator
        last edited by

        Hmm, it sure looks like a response to a dhcp offer. Rogue dhcp server would still be my prime suspect there.

        Steve

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        • DerelictD
          Derelict LAYER 8 Netgate
          last edited by

          A client that previously had that address will request that address again.

          It should get a NAK then do a discover, offer, request, ack dance for the network it is currently connected to.

          What else is logged related to that MAC address?

          Chattanooga, Tennessee, USA
          A comprehensive network diagram is worth 10,000 words and 15 conference calls.
          DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
          Do Not Chat For Help! NO_WAN_EGRESS(TM)

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          • JKnottJ
            JKnott
            last edited by

            @dad311:

            Im not even sure how this is possible, could someone shed some light on this???  thx.

            DHCP clients try for the previous address.  If available, the DHCP server will provide it.

            PfSense running on Qotom mini PC
            i5 CPU, 4 GB memory, 32 GB SSD & 4 Intel Gb Ethernet ports.
            UniFi AC-Lite access point

            I haven't lost my mind. It's around here...somewhere...

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            • D
              dad311
              last edited by

              Thx for the replies!  Although nmap reported only 1 dhcp sever on the network, I found an access point with dhcp turned.  I'm assuming this was the issue…..

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