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DNS Resolution Behavior-Adding a strange entry of ::1

Scheduled Pinned Locked Moved DHCP and DNS
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  • N
    Normandy214
    last edited by Dec 29, 2024, 3:42 PM

    When I have DNS Resolution Behavior set to use local fallback to remote I see an additional entry of ::1 being added to the List of DNS Servers. If I set it to use remote ignore local I only see the 9.9.9.9 entry.

    DNS server(s)
    127.0.0.1
    ::1
    9.9.9.9

    Any suggestions for what is causing the ::1 DNS server entry on the list?

    1 Reply Last reply Reply Quote 0
    • U
      Uglybrian
      last edited by Uglybrian Dec 29, 2024, 3:53 PM Dec 29, 2024, 3:50 PM

      ::1 is the same thing as 127.0.0.1 but for ipv6. Loop back, it is normal to see if you have ipv6 enabled.

      Screenshot from 2024-12-29 07-51-03.png

      N M 2 Replies Last reply Dec 29, 2024, 5:00 PM Reply Quote 0
      • N
        Normandy214 @Uglybrian
        last edited by Dec 29, 2024, 5:00 PM

        @Uglybrian Thank you for the quick response. That makes sense.
        I thought I had disabled ipv6 but apparently I didn't disable it completely.

        I'll need to head back in and see what I must have missed.

        1 Reply Last reply Reply Quote 0
        • M
          MarinSNB @Uglybrian
          last edited by Dec 29, 2024, 5:18 PM

          @Uglybrian I have the ipv6 disabled and still see the same as OP - have not figured out where that is coming from. I have pFsense+ loaded in my main box I have copied and downloaded the same configuration to another white box with pfSense CE and I don't see the IPv6 entry.

          Netgate 6100 Max pfSense+
          —>Unifi Aggregation/24 Pro PoE/24 PoE Enterprise switches
          —> UCK2+
          —> 3x U6E APs

          1 Reply Last reply Reply Quote 0
          • U
            Uglybrian
            last edited by Dec 29, 2024, 5:19 PM

            go to system > advanced > networking, scroll down a bit and uncheck "allow ipv6"

            M 1 Reply Last reply Dec 29, 2024, 5:21 PM Reply Quote 0
            • M
              MarinSNB
              last edited by Dec 29, 2024, 5:20 PM

              The only place I have not looked is the NAT section. I have a feeling I may have some old entries there that will probably need to be deleted.

              Netgate 6100 Max pfSense+
              —>Unifi Aggregation/24 Pro PoE/24 PoE Enterprise switches
              —> UCK2+
              —> 3x U6E APs

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              • M
                MarinSNB @Uglybrian
                last edited by Dec 29, 2024, 5:21 PM

                @Uglybrian Yes, I have done all of that plus Router Advertisments section, etc.

                Netgate 6100 Max pfSense+
                —>Unifi Aggregation/24 Pro PoE/24 PoE Enterprise switches
                —> UCK2+
                —> 3x U6E APs

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                • M
                  MarinSNB
                  last edited by Dec 29, 2024, 5:25 PM

                  I do however see IPv6 entries in Automatic Rules (in the Outbound NAT section) but I cannot edit/change/delete them.

                  Netgate 6100 Max pfSense+
                  —>Unifi Aggregation/24 Pro PoE/24 PoE Enterprise switches
                  —> UCK2+
                  —> 3x U6E APs

                  J U 2 Replies Last reply Dec 29, 2024, 5:35 PM Reply Quote 0
                  • J
                    johnpoz LAYER 8 Global Moderator @MarinSNB
                    last edited by Dec 29, 2024, 5:35 PM

                    @MarinSNB you can disable ipv6 and not allow it per firewalls - this doesn't remove the ipv6 loopback.

                    Its not hurting anything - if you don't like it listed. Ie your OCD is bothering you then set to use remote only and put in 127.0.0.1 so it will still ask itself. I know this has come a few times already and multiple threads about 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

                    M 1 Reply Last reply Dec 29, 2024, 5:43 PM Reply Quote 0
                    • U
                      Uglybrian @MarinSNB
                      last edited by Uglybrian Dec 30, 2024, 1:03 AM Dec 29, 2024, 5:41 PM

                      @MarinSNB I have never experienced your particular problem. I do think you are on the right track by turning off all things ipv6. Check to see if your DHCP6 server is still on. If not, the only thing I can think of is to reset the state table and try a reboot. I doubt the reboot will work, but it is a stone unturned. If it is still there I would double check all ipv6 settings.
                      Forget what i said above. As I recall seeing ::1 in ''DNS servers'' is the new default as of 24 . something

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                      • M
                        MarinSNB @johnpoz
                        last edited by Dec 29, 2024, 5:43 PM

                        @johnpoz thanks for the reply. Frankly, it hasn't bothered me. I have had this happen for quite some time now but didn't bother to mention it for some of the reasons you mentioned. I am curious however as to what causes this behavior considering the my CE box doesn't show the extra IPv6 entry in the DNS servers section in UI. Is there a setting in the Plus version that is different from the CE one when it comes to this? Again, I am simply curious but not loosing sleep at night about it.

                        Netgate 6100 Max pfSense+
                        —>Unifi Aggregation/24 Pro PoE/24 PoE Enterprise switches
                        —> UCK2+
                        —> 3x U6E APs

                        J 1 Reply Last reply Dec 29, 2024, 5:54 PM Reply Quote 0
                        • J
                          johnpoz LAYER 8 Global Moderator @MarinSNB
                          last edited by Dec 29, 2024, 5:54 PM

                          @MarinSNB my understanding is yes some code in the + changed, not sure when but it was for sure before 24.11 this showed up.. My guess is when CE 2.8 drops will see the same thing in CE

                          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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