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    Pfsense ignoring DHCP offer on WAN

    Scheduled Pinned Locked Moved General pfSense Questions
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    • V
      vronp
      last edited by

      Hi all,

      I've got a perplexing problem with a new pfsense setup.  The box seems to be ignoring the WAN IP assignment from an SB6141 modem on Cox Internet.

      Cox is seeing the IP request and it is sending an IP but the box is not picking it up.

      I testing the setup with a Macbook Pro and it picks up the IP just fine.

      In addition, I mac address spoofed on the pfsense box (using the mac from the Macbook Pro).  Cox saw the DHCP request with the spoofed mac and issued an IP.  Again, the pfsense box didn't pick it up.

      I'm just at a loss here.  Need another set of eyes and a clear head to give me some suggestions please.

      thanks,
      Dave

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      • w0wW
        w0w
        last edited by

        Hmm… SB6141 is a plain DOCSIS modem that should work by default with pfSense, did you  check pfSense logs for errors?

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        • V
          vronp
          last edited by

          @w0w:

          Hmm… SB6141 is a plain DOCSIS modem that should work by default with pfSense, did you  check pfSense logs for errors?

          I've come to the conclusion that the ethernet ports are toast.  This started happening right after a power cycle.  I can't communicate with the box via a hardwired laptop.

          Odd that ethernet ports can talk but not hear….

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          • C
            coxhaus
            last edited by

            Is it possible you have your Ethernet cables reversed?

            1 Reply Last reply Reply Quote 0
            • V
              vronp
              last edited by

              @coxhaus:

              Is it possible you have your Ethernet cables reversed?

              Not at all.

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              • DerelictD
                Derelict LAYER 8 Netgate
                last edited by

                Realtek NICs?

                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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                • V
                  vronp
                  last edited by

                  @Derelict:

                  Realtek NICs?

                  Sorry for the late reply.  Yes, they are Realtek NICs.

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                  • DerelictD
                    Derelict LAYER 8 Netgate
                    last edited by

                    I had to replace the realtek daughtercard in my old jetway because of the same sort of thing. It would seemingly go deaf and would manifest itself as failed DHCP renewals from the cable modem.

                    Same router, same slot, but an intel daughtercard and I never saw it again.

                    One of those anecdotal stories about realtek.

                    (I did packet capture prior to swapping it out and the modem/isp were doing everything they should be doing.)

                    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)

                    1 Reply Last reply Reply Quote 0
                    • V
                      vronp
                      last edited by

                      @Derelict:

                      I had to replace the realtek daughtercard in my old jetway because of the same sort of thing. It would seemingly go deaf and would manifest itself as failed DHCP renewals from the cable modem.

                      Same router, same slot, but an intel daughtercard and I never saw it again.

                      One of those anecdotal stories about realtek.

                      (I did packet capture prior to swapping it out and the modem/isp were doing everything they should be doing.)

                      Ugh….  Since your post I've done a lot more research and now see that Realtek NICs are a major issue.  Unfortunately, I've got a small single-board computer with NICs on the board.....

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                      • V
                        vronp
                        last edited by

                        @vronp:

                        @Derelict:

                        I had to replace the realtek daughtercard in my old jetway because of the same sort of thing. It would seemingly go deaf and would manifest itself as failed DHCP renewals from the cable modem.

                        Same router, same slot, but an intel daughtercard and I never saw it again.

                        One of those anecdotal stories about realtek.

                        (I did packet capture prior to swapping it out and the modem/isp were doing everything they should be doing.)

                        Ugh….  Since your post I've done a lot more research and now see that Realtek NICs are a major issue.  Unfortunately, I've got a small single-board computer with NICs on the board.....

                        Just to cap off this thread…..I've found some mention of a v1.93 driver that may have improved things....

                        1 Reply Last reply Reply Quote 0
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