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    Mystery 'Reply From' address

    General pfSense Questions
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    • C
      cmb
      last edited by

      The modem should just be a bridge in that case. You have a public IP on WAN I presume?

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      • johnpozJ
        johnpoz LAYER 8 Global Moderator
        last edited by

        rfc1918 space is not routable on the public internet.. We are all using it.. There is no reason to try and obfuscate your network that are using this space..  It just make its it harder to help you..

        I use 192.168.9.0/24 for my lan for example… pfsense is at 192.168.9.253 while my box is at 192.168.9.100

        If address space your dealing with is in the private range - there is no reason to hide any parts of this..

        An intelligent man is sometimes forced to be drunk to spend time with his fools
        If you get confused: Listen to the Music Play
        Please don't Chat/PM me for help, unless mod related
        SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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        • C
          Coldaddy
          last edited by

          @CMB Yes, WAN interface is set to use DHCP and is getting an address from Time Warner.

          @johnpoz OK, my internal subnet is 172.16.24.0/24. pfSense firewall is .1. My PC is .55

          If this is my cable modem I wonder why it is not consistent. I'm also not sure what I could do if it is the modem. Any thoughts on ways to troubleshoot this?

          Again, thanks to you both for your help.

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          • johnpozJ
            johnpoz LAYER 8 Global Moderator
            last edited by

            So when you ping something on your own segment

            Pinging 172.16.x.251 with 32 bytes of data:
            Reply from 192.168.1.250: bytes=32 time=4ms TTL=255
            Reply from 172.16.x.251: bytes=32 time<1ms TTL=64
            Reply from 172.16.x.251: bytes=32 time<1ms TTL=64

            And you get a response from something else along with the response from the actual device..  Does this device have multiple IPs?  What is this device 172.16.24.251 your pinging for example??

            And you say you have nothing on your network using 192.168.1.?

            What happens when you try and ping that 192.168.1. address that you got a reply from?  These are wired and not wireless.. Do you have wireless how is it connected?

            An intelligent man is sometimes forced to be drunk to spend time with his fools
            If you get confused: Listen to the Music Play
            Please don't Chat/PM me for help, unless mod related
            SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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            • C
              Coldaddy
              last edited by

              The device I am pinging (.251) is the Wireless Access Point…it is a Wireless Router but is in WAP mode. It is on the same network but not in the connectivity path. It does not have multiple IPs...it gets one from the pfSense DHCP server and the .251 address is reserved for it.

              Yes, there is no 192.168.1.0 network. There was in the past (a couple of months ago). That network was provided by the Wireless Router when it was in router mode.

              Pinging the 192.168.1.250 address:
              PS C:\Windows\system32> ping 192.168.1.250

              Pinging 192.168.1.250 with 32 bytes of data:
              Reply from 192.168.1.250: bytes=32 time=4ms TTL=255
              Reply from 192.168.1.250: bytes=32 time=4ms TTL=255
              Reply from 192.168.1.250: bytes=32 time=4ms TTL=255
              Reply from 192.168.1.250: bytes=32 time=4ms TTL=255

              Ping statistics for 192.168.1.250:
                  Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
              Approximate round trip times in milli-seconds:
                  Minimum = 4ms, Maximum = 4ms, Average = 4ms

              Everything I am working with right now is wired. I do have a wireless access point and it just participates in the internal subnet provided by the pfSense firewall. It is 172.16.24.251.

              Pinging from the WAP:
              PING www.yahoo.com (98.138.253.109): 56 data bytes
              64 bytes from 98.138.253.109: seq=0 ttl=44 time=66.914 ms
              64 bytes from 98.138.253.109: seq=1 ttl=44 time=51.565 ms
              64 bytes from 98.138.253.109: seq=2 ttl=44 time=80.229 ms
              64 bytes from 98.138.253.109: seq=3 ttl=44 time=57.837 ms

              –- www.yahoo.com ping statistics ---
              4 packets transmitted, 4 packets received, 0% packet loss
              round-trip min/avg/max = 51.565/64.136/80.229 ms

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              • C
                Coldaddy
                last edited by

                Also, pinging 192.168.1.250 from the pfSense firewall fails:
                PING 192.168.1.250 (192.168.1.250): 56 data bytes

                –- 192.168.1.250 ping statistics ---
                3 packets transmitted, 0 packets received, 100.0% packet loss

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                • johnpozJ
                  johnpoz LAYER 8 Global Moderator
                  last edited by

                  Well yeah pfsense would fail trying to ping that IP since it would send it out its default gateway interface..

                  So you can ping that from your box…  Look in your arp table what is the mac on that 192.168 AP..  What does that equal assuming its your AP..  Which is what exactly??

                  An intelligent man is sometimes forced to be drunk to spend time with his fools
                  If you get confused: Listen to the Music Play
                  Please don't Chat/PM me for help, unless mod related
                  SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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                  • C
                    Coldaddy
                    last edited by

                    It's not in the arp table:

                    PS C:\Windows\system32> ping 192.168.1.250

                    Pinging 192.168.1.250 with 32 bytes of data:
                    Reply from 192.168.1.250: bytes=32 time=4ms TTL=255
                    Reply from 192.168.1.250: bytes=32 time=4ms TTL=255
                    Reply from 192.168.1.250: bytes=32 time=4ms TTL=255
                    Reply from 192.168.1.250: bytes=32 time=4ms TTL=255

                    Ping statistics for 192.168.1.250:
                        Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
                    Approximate round trip times in milli-seconds:
                        Minimum = 4ms, Maximum = 4ms, Average = 4ms
                    PS C:\Windows\system32> arp -a

                    Interface: 172.16.24.55 –- 0x6
                      Internet Address      Physical Address      Type
                      172.16.24.1          00-08-a2-09-c6-69    dynamic
                      172.16.24.4          00-26-b9-88-ac-16    dynamic
                      172.16.24.19          00-11-32-02-e6-4e    dynamic
                      172.16.24.50          ac-3a-7a-a6-98-39    dynamic
                      172.16.24.51          50-1a-c5-ed-33-db    dynamic
                      172.16.24.53          a0-88-69-14-b1-62    dynamic
                      172.16.24.59          7c-1e-52-86-20-cc    dynamic
                      172.16.24.62          5c-ad-cf-8e-bb-9c    dynamic
                      172.16.24.251        1c-b7-2c-d9-95-d0    dynamic
                      172.16.24.255        ff-ff-ff-ff-ff-ff    static
                      224.0.0.2            01-00-5e-00-00-02    static
                      224.0.0.22            01-00-5e-00-00-16    static
                      224.0.0.251          01-00-5e-00-00-fb    static
                      224.0.0.252          01-00-5e-00-00-fc    static
                      224.0.0.253          01-00-5e-00-00-fd    static
                      239.255.255.250      01-00-5e-7f-ff-fa    static
                      255.255.255.255      ff-ff-ff-ff-ff-ff    static

                    This is such a weird issue.

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                    • johnpozJ
                      johnpoz LAYER 8 Global Moderator
                      last edited by

                      do a traceroute to it..

                      An intelligent man is sometimes forced to be drunk to spend time with his fools
                      If you get confused: Listen to the Music Play
                      Please don't Chat/PM me for help, unless mod related
                      SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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                      • C
                        Coldaddy
                        last edited by

                        PS C:\Windows\system32> tracert 192.168.1.250

                        Tracing route to 192.168.1.250 over a maximum of 30 hops

                        1    <1 ms    <1 ms    <1 ms  172.16.24.1
                          2    4 ms    5 ms    4 ms  192.168.1.250

                        Trace complete.

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                        • C
                          cmb
                          last edited by

                          That's almost certainly your modem. 4 ms is too low for it to be traversing the coax and looks to be too consistently 4 ms for that as well.

                          I haven't heard of anyone else seeing anything like that. Though there is some buggy firmware going around on TWC for SB6183 modems, I'd only heard of it breaking IPv6, not doing stupid things with IPv4. See this thread for instance, and the links to dslreports there.
                          https://forum.pfsense.org/index.php?topic=108971.0

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