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    HELP! After some days of downtime, suddenly I can't get an IP via DHCP

    Scheduled Pinned Locked Moved General pfSense Questions
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    • Kalle13K
      Kalle13
      last edited by Kalle13

      Hello,

      long story short. After some days of downtime, suddenly I can't get an IP via DHCP on the WAN after the first bootup. All that changed was the Modem before the the pfSense. It' s now a Technicolor TC4400. The pfSense runs on a Super Micro C2758 with 4 Ethernet ports.
      I resetted the system to factory defaults. I did the configuration on the terminal via VGA: With all the 4 Nics as WAN I can't get an IP! No single NIC get' s an IP. It's so frustrating! With my normal Laptop I get my offitial fixed IP via DHCP through the TC4400.

      My whole Network stands still. I don't know what to do!
      Do you have any ideas?

      Best regards
      Kalle

      GertjanG JKnottJ 2 Replies Last reply Reply Quote 0
      • GertjanG
        Gertjan @Kalle13
        last edited by

        Try this : Note down the MAC of your "normal laptop", and clone that on the WAN of pfSense interface that is connected to your modem.

        @Kalle13 said in HELP! After some days of downtime, suddenly I can't get an IP via DHCP:

        With all the 4 Nics as WAN I

        4 WAN's for one modem ?

        No "help me" PM's please. Use the forum, the community will thank you.
        Edit : and where are the logs ??

        RicoR 1 Reply Last reply Reply Quote 0
        • RicoR
          Rico LAYER 8 Rebel Alliance @Gertjan
          last edited by

          @Gertjan said in HELP! After some days of downtime, suddenly I can't get an IP via DHCP:

          4 WAN's for one modem ?

          I think this means he tried to connect NIC by NIC for troubleshooting.

          -Rico

          Kalle13K 1 Reply Last reply Reply Quote 0
          • Kalle13K
            Kalle13 @Rico
            last edited by

            @Rico That's right. It configured NIC by NIC as WAN to the Modem.

            1 Reply Last reply Reply Quote 0
            • GertjanG
              Gertjan
              last edited by

              MAC cloning helped ?

              Or : if your modem has some GUI - reset it first.

              No "help me" PM's please. Use the forum, the community will thank you.
              Edit : and where are the logs ??

              1 Reply Last reply Reply Quote 0
              • JKnottJ
                JKnott @Kalle13
                last edited by

                This post is deleted!
                1 Reply Last reply Reply Quote 0
                • stephenw10S
                  stephenw10 Netgate Administrator
                  last edited by

                  If it worked with your laptop try spoofing that MAC address on the pfSense WAN.
                  https://docs.netgate.com/pfsense/en/latest/interfaces/interface-settings.html#mac-spoofing

                  Check the DHCP logs for dhclient entries.

                  Steve

                  Kalle13K 1 Reply Last reply Reply Quote 1
                  • Kalle13K
                    Kalle13 @stephenw10
                    last edited by

                    This post is deleted!
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                    • Kalle13K
                      Kalle13
                      last edited by

                      The spoofing was the right hint (I did not reset the Modem, because it was new), THANK YOU!! BUT why would they cache the MAC address and block it? Can I clear the cache (I think not)? How can I get them to clear the cache?

                      But know I have my old problem: an unstable WAN connection. My WAN switches between an IPv4, IPv6 address and disconnected. I switched the interface with "ifconfig" on and of but no success. ONLY a reboot helps. This seems to be a bug. I read about it one some threads so I am not the only one with this issue.

                      Best regards,
                      Kalle

                      1 Reply Last reply Reply Quote 0
                      • stephenw10S
                        stephenw10 Netgate Administrator
                        last edited by

                        A lot of ISPs do that. Usually the modem locks to one MAC address and resetting it will allow a new MAC to be used. Some ISPs log that upstream though and you have to call and get it reset.

                        Check the dhcp and system logs when that is happening. Something will be logged there.

                        Steve

                        1 Reply Last reply Reply Quote 0
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