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

    SG-3100 Potential DNS issue / Intermittent drop

    Scheduled Pinned Locked Moved Official Netgate® Hardware
    9 Posts 5 Posters 657 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.
    • S
      Spearhead1
      last edited by

      Hello all! New to the forum and the platform. I have thoroughly enjoyed pfsense and the quality device netgate has produced but am stuck on one nagging issue. Resolving websites hangs for 30 seconds to a full minute multiple times per hour and during that time if I attempt to ping google dns it fails but after 20 or 30 attempts all of a sudden comes back. This is happening all day every day. For context, I have ATT Fiber 1G/1G for my ISP and have their gateway setup in IP passthrough mode with all filters and firewall features turned off on that device. Has anybody experienced this issue and can provide insight on a fix?

      1 Reply Last reply Reply Quote 0
      • bingo600B
        bingo600
        last edited by bingo600

        Do you use Unbound resolver ?
        Have you enabled : Register DHCP leases in the DNS Resolver
        Don't do that.

        I did for starters, and chased the same ghost as you see.

        Every time a lease is registered , Unbound is restarted , not "HUP'ed".
        Creating a "DNS loss" during the restart time.

        Try to remove any registering , besides static , in the resolver

        /Bingo

        If you find my answer useful - Please give the post a 👍 - "thumbs up"

        pfSense+ 23.05.1 (ZFS)

        QOTOM-Q355G4 Quad Lan.
        CPU  : Core i5 5250U, Ram : 8GB Kingston DDR3LV 1600
        LAN  : 4 x Intel 211, Disk  : 240G SAMSUNG MZ7L3240HCHQ SSD

        1 Reply Last reply Reply Quote 1
        • S
          Spearhead1
          last edited by

          @bingo600 said in SG-3100 Potential DNS issue / Intermittent drop:

          Register DHCP leases in the DNS Resolver

          I'm not sure how to answer whether I use unbound resolver. I do have DNS resolver enabled and took your advice in checking Register DHCP leases. I also disabled IPV6 completely. So far so good.

          Thank you for the help! @bingo600

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

            That sort of delay can be introduced if you have partially configured IPv6. If hosts are receiving an IPv6 IP and route but do not actually have IPv6 connectivity they will try v6 first and have to time out.

            Steve

            1 Reply Last reply Reply Quote 0
            • S
              SteveITS Galactic Empire @Spearhead1
              last edited by

              @Spearhead1 said in SG-3100 Potential DNS issue / Intermittent drop:

              took your advice in checking Register DHCP leases

              He meant to uncheck that option...when a lease is registered it will cause unbound to restart. Sounds like that wasn't your issue, but it may crop up if you turn that option on.

              Pre-2.7.2/23.09: Only install packages for your version, or risk breaking it. Select your branch in System/Update/Update Settings.
              When upgrading, allow 10-15 minutes to restart, or more depending on packages and device speed.
              Upvote 👍 helpful posts!

              bingo600B 1 Reply Last reply Reply Quote 0
              • bingo600B
                bingo600 @SteveITS
                last edited by bingo600

                @teamits said in SG-3100 Potential DNS issue / Intermittent drop:

                @Spearhead1 said in SG-3100 Potential DNS issue / Intermittent drop:

                took your advice in checking Register DHCP leases

                He meant to uncheck that option...when a lease is registered it will cause unbound to restart. Sounds like that wasn't your issue, but it may crop up if you turn that option on.

                I just corrected my post , to say don't enable that.
                Could be a bit misleading , if you didn't read the full post

                Thnx

                Edit: But i'm quite sure that OP got the meaning of what i wrote , and disabled the registering.

                /Bingo

                If you find my answer useful - Please give the post a 👍 - "thumbs up"

                pfSense+ 23.05.1 (ZFS)

                QOTOM-Q355G4 Quad Lan.
                CPU  : Core i5 5250U, Ram : 8GB Kingston DDR3LV 1600
                LAN  : 4 x Intel 211, Disk  : 240G SAMSUNG MZ7L3240HCHQ SSD

                1 Reply Last reply Reply Quote 0
                • N
                  negate1
                  last edited by

                  Hello, I did not experience this issue before.This is strange that it happens to you most of the time. Maybe deregister?

                  stephenw10S 1 Reply Last reply Reply Quote 0
                  • stephenw10S
                    stephenw10 Netgate Administrator @negate1
                    last edited by

                    @negate1 Pretty sure you're a bot or increasing post count in preparation for spam at this point.

                    Please clarify your statement here and prove you're not.

                    Steve

                    1 Reply Last reply Reply Quote 0
                    • bingo600B
                      bingo600
                      last edited by

                      There was another post with a different wording , and the name Sara i think.

                      But my thought too.

                      /Bingo

                      If you find my answer useful - Please give the post a 👍 - "thumbs up"

                      pfSense+ 23.05.1 (ZFS)

                      QOTOM-Q355G4 Quad Lan.
                      CPU  : Core i5 5250U, Ram : 8GB Kingston DDR3LV 1600
                      LAN  : 4 x Intel 211, Disk  : 240G SAMSUNG MZ7L3240HCHQ SSD

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