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    UDP 67 ISP DHCP ack/request, losing connectivity.

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    General pfSense Questions
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    • M
      Mad Professor
      last edited by

      I had to exchange my modem about week and half ago since the old one bit the dust.

      This new one is giving me problems.

      Symptoms:
      Connection dropping every 6 hours or close to it. If you power cycle the modem, it will drop the connection again in 15 minutes, after that it's ok for 6 hours. it doesn't lose signal, or cable synchronization . I'm convince that pfsense is blocking somethingcritcal for dhcp renewal.

      In system logs:

      1:30ish am connection went down.
      bound to xx.xxx.xxx.xxx is my ip.

      
Aug 22 01:36:57 	dhclient[19928]: bound to xx.xxx.xxx.xxx -- renewal in 10662 seconds.
Aug 22 01:36:57 	dhclient[19928]: DHCPACK from 10.50.80.1
Aug 22 01:36:57 	dhclient[19928]: DHCPREQUEST on xl0 to 255.255.255.255 port 67
Aug 22 01:36:57 	kernel: xl0: link state changed to UP
Aug 22 01:36:45 	dhclient[55419]: exiting.
Aug 22 01:36:45 	dhclient[55419]: exiting.
Aug 22 01:36:45 	dhclient[55419]: connection closed
Aug 22 01:36:45 	dhclient[55419]: connection closed
Aug 22 01:36:45 	kernel: xl0: link state changed to DOWN
Aug 22 01:36:42 	php: : HOTPLUG: Configuring wan interface xl0
Aug 22 01:36:42 	php: : DEVD Ethernet attached event for xl0
Aug 22 01:36:42 	php: : Processing xl0 - start
Aug 22 01:36:41 	check_reload_status: rc.linkup starting
Aug 22 01:36:41 	kernel: xl0: link state changed to UP
Aug 22 01:35:25 	kernel: xl0: link state changed to DOWN

      9ish conneciton went down.
      did the same thing above except around 8 it spam
      DHCPREQUEST on xl0 to 10.50.80.1
      repeats for 2 minutes before down link.

      
Aug 21 21:18:54 	dnsmasq[61603]: exiting on receipt of SIGTERM
Aug 21 21:18:52 	dhclient[54716]: bound to 192.168.100.10 -- renewal in 30 seconds.
Aug 21 21:18:52 	dhclient[54716]: DHCPACK from 192.168.100.1
Aug 21 21:18:52 	dhclient[54716]: DHCPREQUEST on xl0 to 255.255.255.255 port 67
Aug 21 21:18:51 	dhclient[54716]: DHCPREQUEST on xl0 to 255.255.255.255 port 67
Aug 21 21:18:49 	dhclient[54716]: DHCPOFFER from 192.168.100.1
Aug 21 21:18:49 	dhclient[54716]: DHCPDISCOVER on xl0 to 255.255.255.255 port 67 interval 1
Aug 21 21:18:49 	dhclient[54716]: DHCPNAK from 192.168.100.1
Aug 21 21:18:49 	last message repeated 2 times
Aug 21 21:18:47 	dhclient[54716]: DHCPREQUEST on xl0 to 255.255.255.255 port 67
Aug 21 21:18:46 	dhclient[61485]: exiting.
Aug 21 21:18:46 	dhclient[61485]: exiting.
Aug 21 21:18:46 	dhclient[61485]: connection closed
Aug 21 21:18:46 	dhclient[61485]: connection closed
Aug 21 21:18:43 	php: : HOTPLUG: Configuring wan interface xl0
Aug 21 21:18:43 	php: : DEVD Ethernet attached event for xl0
Aug 21 21:18:43 	php: : Processing xl0 - start
Aug 21 21:18:42 	check_reload_status: rc.linkup starting
Aug 21 21:18:41 	kernel: xl0: link state changed to UP
Aug 21 21:18:35 	kernel: xl0: link state changed to DOWN
Aug 21 20:56:47 	dhclient[61562]: SENDING DIRECT
Aug 21 20:56:47 	dhclient[61562]: DHCPREQUEST on xl0 to 10.50.80.1 port 67
Aug 21 20:43:29 	dhclient[61562]: SENDING DIRECT
Aug 21 20:43:29 	dhclient[61562]: DHCPREQUEST on xl0 to 10.50.80.1 port 67
Aug 21 20:35:09 	dhclient[61562]: SENDING DIRECT
Aug 21 20:35:09 	dhclient[61562]: DHCPREQUEST on xl0 to 10.50.80.1 port 67
Aug 21 20:31:09 	dhclient[61562]: SENDING DIRECT
Aug 21 20:31:09 	dhclient[61562]: DHCPREQUEST on xl0 to 10.50.80.1 port 67
Aug 21 20:28:17 	dhclient[61562]: SENDING DIRECT
Aug 21 20:28:17 	dhclient[61562]: DHCPREQUEST on xl0 to 10.50.80.1 port 67
Aug 21 20:26:31 	dhclient[61562]: SENDING DIRECT
Aug 21 20:26:31 	dhclient[61562]: DHCPREQUEST on xl0 to 10.50.80.1 port 67
Aug 21 20:25:25 	dhclient[61562]: SENDING DIRECT
Aug 21 20:25:25 	dhclient[61562]: DHCPREQUEST on xl0 to 10.50.80.1 port 67

      In firewall:

      
Aug 22 03:44:52  WAN  10.50.80.1:67  255.255.255.255:68  UDP
Aug 22 03:44:33 WAN 10.50.80.1:67 255.255.255.255:68 UDP
Aug 22 03:44:33 WAN 10.50.80.1:67 255.255.255.255:68 UDP
Aug 22 03:44:07 WAN 10.50.80.1:67 255.255.255.255:68 UDP
Aug 22 03:42:07 WAN 10.50.80.1:67 255.255.255.255:68 UDP
Aug 22 03:41:47 WAN 10.50.80.1:67 255.255.255.255:68 UDP
Aug 22 03:41:43 WAN 10.50.80.1:67 255.255.255.255:68 UDP
Aug 22 03:41:43 WAN 10.50.80.1:67 255.255.255.255:68 UDP
Aug 22 03:41:42 WAN 10.50.80.1:67 255.255.255.255:68 UDP
Aug 22 03:41:42 WAN 10.50.80.1:67 255.255.255.255:68 UDP
Aug 22 03:40:59 WAN 10.50.80.1:67 255.255.255.255:68 UDP
Aug 22 03:40:36 WAN 10.50.80.1:67 255.255.255.255:68 UDP
Aug 22 03:39:47 WAN 10.50.80.1:67 255.255.255.255:68 UDP
Aug 22 03:36:13 LAN 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 BRIDGE0 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 LAN 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 LAN 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 BRIDGE0 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 LAN 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 LAN 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 BRIDGE0 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 LAN 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 LAN 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 BRIDGE0 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 LAN 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 LAN 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 BRIDGE0 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 LAN 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 LAN 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 BRIDGE0 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 LAN 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 LAN 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 BRIDGE0 192.168.1.1:1024 239.255.255.250:1900 UDP
Aug 22 03:36:13 LAN 192.168.1.1:1024 239.255.2

      I have no idea what lan/bridge0 is. if anybody can tell me.
      But if you look at the top you see 10.50.80.1 trying to reach it destination 255.255.255.255
      It just floods my logs.

      I don't have second router, pfsense connects directly to modem.
      It's Scientific-Atlantic WebSTAR DPC2100R2 but in interfaces of pfsense I get a real ip, not a private space address.

      Looks like pfsense is trying to renew the ip when the lease time is up. I always have the same ip after power-cycling the modem.

      10.50.80.1 which is the first hop after pfsense in tracert to google. I assume that 10.50.80.1 is the wan node gateway?

      Question is how can I resolve it or can I just set wan to static instead of dhcp?

      Any help is appreciated, and don't give me the run around, please.

      1 Reply Last reply Reply Quote 0
      • Cry HavokC
        Cry Havok
        last edited by

        Looks like a problem with your ISP or modem, particularly as you say the only thing you changed was the modem.  What you describe perfectly matches what I'd expect with a broken DHCP server.

        1 Reply Last reply Reply Quote 0
        • M
          Mad Professor
          last edited by

          Forgot to mention in the firewall part they are all being block. In wan setup I have "Block private networks" checked.

          Are you sure? I can go tomorrow and swap modems again, perhaps I'll ask for another toshiba which is what I had before and never had a problem with pfsense.

          I guess my modem could be bad, the send light on it doesn't work, only receive.

          1 Reply Last reply Reply Quote 0
          • Cry HavokC
            Cry Havok
            last edited by

            Is the pfSense WAN IP 10.50.80.1?  If not what are the first 2 numbers (eg 10.50.x.x)?

            1 Reply Last reply Reply Quote 0
            • M
              Mad Professor
              last edited by

              70.119.XXX.XXX

              small cut from tracert to google.com.

              
1    <1 ms    <1 ms    <1 ms  router.local [192.168.0.1]
2    23 ms    26 ms    22 ms  10.50.80.1
3    54 ms    49 ms    58 ms  ten0-3-orld06-ser1.noc.bhn.net [72.31.XXX.XX]
              1 Reply Last reply Reply Quote 0
              • Cry HavokC
                Cry Havok
                last edited by

                Try disabling the option to block "bogon" networks, see if that helps.

                1 Reply Last reply Reply Quote 0
                • M
                  Mad Professor
                  last edited by

                  All right I'll give it shot see what happens.

                  Thank you Cry.

                  1 Reply Last reply Reply Quote 0
                  • M
                    Mad Professor
                    last edited by

                    So after playing with it a little more, I did a modem swap and last few days it's been working smoothly, got Motorola Surfboard 5101 instead of another webstar.

                    Thanks Cry.

                    1 Reply Last reply Reply Quote 0
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