Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    pfsense DNS resolver not registering IPv6 addresses

    Scheduled Pinned Locked Moved IPv6
    27 Posts 6 Posters 6.6k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • JKnottJ
      JKnott @Peek
      last edited by

      @Peek said in pfsense DNS resolver not registering IPv6 addresses:

      @JKnott. Winblows & Linux.

      Okay ... so Linux basically "bridges" eth0 with the wifi interface when connected via eth0 by default.

      Will try. Thanks.

      No, it routes. Linux functions as a router, unless you disable it. I expect the same is true with the FreeBSD under pfSense and Macs. Also, when both interfaces are up, to the same network, it forwards the packets over the interface with the lowest metric. The metric is 100 for Ethernet and 600 for WiFi, so Ethernet gets used.

      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...

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

        @JKnott

        Perhaps routing isn't the best term in this instance. Unlike Windows, Linux leaves both interfaces up, when Ethernet is connected. When an arp request comes in on the Ethernet port, for the WiFi address, Linux still responds, not caring which interface the address is assigned to and replies through the Ethernet port, based on it having the lower metric.

        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...

        1 Reply Last reply Reply Quote 0
        • johnpozJ
          johnpoz LAYER 8 Global Moderator
          last edited by johnpoz

          @JKnott said in pfsense DNS resolver not registering IPv6 addresses:

          Linux functions as a router, unless you disable it.

          Which linux distros are these, out of the box every single linux I have ever setup - unless its a specific "router" distro.
          user@uc:~$ cat /proc/sys/net/ipv4/ip_forward
          0

          When you have 2 interfaces in the same network, yeah the OS should use the interface with the lowest metric to talk to that network.

          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 2.8, 24.11

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

            @johnpoz

            Sorry, my mistake. I must have been thinking of something else. Regardless, with Linux both interfaces are up and either address can be used as I do frequently.

            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...

            1 Reply Last reply Reply Quote 0
            • johnpozJ
              johnpoz LAYER 8 Global Moderator
              last edited by johnpoz

              This is no different than windows.. I can fire up a wifi interface and use it, on the same network my wire is connected too.

              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 2.8, 24.11

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

                @johnpoz

                On the same network? When I try that, I can't ping the WiFi interface, if Ethernet is connected. I haven't tried different networks. On my home network, I normally use WiFi for my notebook, but on occasion use Ethernet. Eitherway, I use the WiFi host name to connect to 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...

                PeekP 1 Reply Last reply Reply Quote 0
                • PeekP
                  Peek @JKnott
                  last edited by

                  Allrighty then ...

                  It's thus the WiFi address to be registered in DNS for connectivity via WiFi OR ETH.

                  1 Reply Last reply Reply Quote 0
                  • johnpozJ
                    johnpoz LAYER 8 Global Moderator
                    last edited by

                    Well depends on your box or driver - some bios can disable wifi on a wired connection.. But you can for sure fire it up and use it if you so desire.. But its almost never a good thing ;)

                    Wireless LAN adapter Wi-Fi:
                    
                       Connection-specific DNS Suffix  . : local.lan
                       Description . . . . . . . . . . . : Broadcom 802.11n Network Adapter
                       Physical Address. . . . . . . . . : 38-59-F9-5F-63-C1
                       DHCP Enabled. . . . . . . . . . . : Yes
                       Autoconfiguration Enabled . . . . : Yes
                       IPv4 Address. . . . . . . . . . . : 192.168.9.212(Preferred)
                       Subnet Mask . . . . . . . . . . . : 255.255.255.0
                       Lease Obtained. . . . . . . . . . : Wednesday, September 18, 2019 10:10:33 PM
                       Lease Expires . . . . . . . . . . : Sunday, September 22, 2019 10:10:32 PM
                       Default Gateway . . . . . . . . . : 192.168.9.253
                       DHCP Server . . . . . . . . . . . : 192.168.9.253
                       DNS Servers . . . . . . . . . . . : 192.168.3.10
                       NetBIOS over Tcpip. . . . . . . . : Enabled
                    

                    Just fired wifi on same 192.168.9 network

                    Here is wire

                    Ethernet adapter Local:
                    
                       Connection-specific DNS Suffix  . :
                       Description . . . . . . . . . . . : Realtek PCIe GbE Family Controller
                       Physical Address. . . . . . . . . : 00-13-3B-2F-67-62
                       DHCP Enabled. . . . . . . . . . . : No
                       Autoconfiguration Enabled . . . . : Yes
                       IPv4 Address. . . . . . . . . . . : 192.168.9.100(Preferred)
                       Subnet Mask . . . . . . . . . . . : 255.255.255.0
                       Default Gateway . . . . . . . . . : 192.168.9.253
                       DNS Servers . . . . . . . . . . . : 192.168.3.10
                       NetBIOS over Tcpip. . . . . . . . : Enabled
                    

                    Here i am pinging the wifi IP from another box

                    user@uc:~$ ping 192.168.9.212
                    PING 192.168.9.212 (192.168.9.212) 56(84) bytes of data.
                    64 bytes from 192.168.9.212: icmp_seq=1 ttl=127 time=1.42 ms
                    64 bytes from 192.168.9.212: icmp_seq=2 ttl=127 time=1.26 ms
                    64 bytes from 192.168.9.212: icmp_seq=3 ttl=127 time=2.40 ms
                    64 bytes from 192.168.9.212: icmp_seq=4 ttl=127 time=4.29 ms
                    64 bytes from 192.168.9.212: icmp_seq=5 ttl=127 time=1.90 ms
                    64 bytes from 192.168.9.212: icmp_seq=6 ttl=127 time=2.94 ms
                    64 bytes from 192.168.9.212: icmp_seq=7 ttl=127 time=1.24 ms
                    64 bytes from 192.168.9.212: icmp_seq=8 ttl=127 time=1.34 ms
                    ^C
                    --- 192.168.9.212 ping statistics ---
                    8 packets transmitted, 8 received, 0% packet loss, time 7010ms
                    rtt min/avg/max/mdev = 1.246/2.102/4.295/1.009 ms
                    user@uc:~$ 
                    

                    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 2.8, 24.11

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

                      @johnpoz

                      Here's what happens here, with Ethernet connected:

                      Ping WiFi address

                      ping 172.16.0.40
                      PING 172.16.0.40 (172.16.0.40) 56(84) bytes of data.
                      From 172.16.0.10 icmp_seq=1 Destination Host Unreachable
                      From 172.16.0.10 icmp_seq=2 Destination Host Unreachable
                      From 172.16.0.10 icmp_seq=3 Destination Host Unreachable
                      ^C
                      --- 172.16.0.40 ping statistics ---
                      5 packets transmitted, 0 received, +3 errors, 100% packet loss, time 4099ms
                      pipe 4

                      Ping Ethernet address

                      ping 172.16.0.40
                      PING 172.16.0.40 (172.16.0.40) 56(84) bytes of data.
                      From 172.16.0.10 icmp_seq=1 Destination Host Unreachable
                      From 172.16.0.10 icmp_seq=2 Destination Host Unreachable
                      From 172.16.0.10 icmp_seq=3 Destination Host Unreachable
                      ^C
                      --- 172.16.0.40 ping statistics ---
                      5 packets transmitted, 0 received, +3 errors, 100% packet loss, time 4099ms
                      pipe 4

                      However, one thing I did notice was that the WiFi address is reachable for several seconds after plugging in the cable, then becomes unreachable.

                      If WiFi only is connected, I cannot reach the Ethernet address.

                      So, it appears Windows is shutting down the WiF interface, after Ethernet is connected. Ipconfig shows it as "Media disconnected".

                      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...

                      1 Reply Last reply Reply Quote 0
                      • johnpozJ
                        johnpoz LAYER 8 Global Moderator
                        last edited by johnpoz

                        Again that could be a setting in the bios or the driver, or the software you put on for the wifi card.. Is this a laptop? Its very common for laptops to do that..

                        Example

                        Here is my wifi card driver settings
                        driversetting.png

                        Notice I have it disabled ;)

                        Again - because its not normally a good thing to be multihomed..

                        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 2.8, 24.11

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

                          @johnpoz said in pfsense DNS resolver not registering IPv6 addresses:

                          Notice I have it disabled ;)

                          My Wifi NIC doesn't have that setting. 😦

                          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...

                          1 Reply Last reply Reply Quote 0
                          • johnpozJ
                            johnpoz LAYER 8 Global Moderator
                            last edited by johnpoz

                            What driver are you using - is it current, is it from the maker of the PC/Laptop or from the maker of the card.

                            What specific card is it, in your PC? What version of windows are you running? Pretty sure that should be available if the driver supports it in anything above windows 7.

                            Was the card part of the PC.. If so look in the bios. Or is it a laptop?

                            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 2.8, 24.11

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

                              @johnpoz

                              It's a Lenovo E520 ThinkPad. It's whatever driver comes with Windows 10, as I haven't installed any other. It originally came with Windows 7. I just took a quick look and didn't see any I could download.

                              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...

                              1 Reply Last reply Reply Quote 0
                              • First post
                                Last post
                              Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.