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    Lit Fibre (UK) IPv6 stopped after powercut

    Scheduled Pinned Locked Moved IPv6
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    • JKnottJ
      JKnott @F022Y
      last edited by

      @F022Y said in Lit Fibre (UK) IPv6 stopped after powercut:

      I know what i did wrong last time and will make sure not to repeat, now i assume the captured port is WAN? Just want to double check.

      Yes, that is correct. When you filter on those UDP ports, you will have 4 packets captured. You can look at the capture file with Wireshark, as I demonstrated with a screen capture.

      Was that scheduled maintenance yours or your ISPs?

      BTW, DHCP6 works exactly like DHCP4, with the solicit, advertise, request and reply packets. However, once that's completed, then the LAN prefix has to be obtained from the reply packet and applied to the LAN. There is nothing comparable to that in IPv4.

      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
      • F022YF
        F022Y
        last edited by

        It was ISP based, due to merging networks with their new owners CityFibre.

        I do appreciate the assist.

        1 Reply Last reply Reply Quote 0
        • F022YF
          F022Y
          last edited by F022Y

          It died again, this time no IPv6 at all

          packetcapture-igc0-20250318162548.pcap

          JKnottJ 1 Reply Last reply Reply Quote 0
          • JKnottJ
            JKnott @F022Y
            last edited by

            @F022Y said in Lit Fibre (UK) IPv6 stopped after powercut:

            about 2 hours ago

            It died again, this time no IPv6 at all

            Here's what the reply packet shows:

            7735df9a-03c8-4856-b5f7-6b50bc55a7e9-image.png

            The IA address should be the WAN interface address and the prefix address is your LAN prefix. Are you saying you're not seeing either of those? I also see you're getting a /48 prefix size. Nice you can get one that big. I only have a /56. 😭

            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
            • F022YF
              F022Y
              last edited by

              Just logged back into pfsense after grabbing that pcap and the interface shows connections.

              38359671-aa82-4565-81bd-baa134c53aa1-image.png
              6c1aea32-4c2c-4106-83cd-4b52350c9d18-image.png
              2aaf8b14-a1c8-402a-b221-867986f77a3a-image.png

              f8d3a0c6-70ef-4b7e-9c19-2e8f06a790ac-image.png
              547f6936-57ff-4ba0-8d16-767606958520-image.png

              10a5f2de-2d7d-4b5b-861f-89f032160347-image.png
              6b587298-370a-4101-b4f9-b6eb22e8ad17-image.png

              JKnottJ 1 Reply Last reply Reply Quote 0
              • JKnottJ
                JKnott @F022Y
                last edited by

                @F022Y

                Are you seeing the IPv6 pings leave your network? Perhaps there's a routing issue from your ISP. You can see the pings in packet capture, by filtering on ICMP6. You should see both the request and reply in the capture. What happens if you ping something closer than netgate? One thing you can do is traceroute to netgate or other and see how far it goes. Given the ISP is doing stuff, bad routes are a definite possibility.

                You might also try this by tethering to a cell phone and seeing if you get the same results there. If the cell connection works, you can see if your pings can reach it from your Lit Fibre connection. You may want to use Wireshark on the computer tethered to the phone.

                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...

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                • F022YF
                  F022Y
                  last edited by

                  Nope nothing.

                  7fe32dfb-1093-4e99-b61c-ffd4802bdddf-image.png

                  2530d1f5-1d56-4e77-8103-40d97c30e8d5-image.png

                  e6d08539-ad20-40d4-a201-f9b02953b6b4-image.png

                  packetcapture-igc0-20250318201715.pcap

                  Looks like my 3 cell connection doesn't support IPv6 so unable to test like that.

                  I am right with the LAN config tho, with it being tracked to the WAN?

                  3f208dd7-2dfe-42ff-b928-f037d9039d2c-image.png

                  JKnottJ 2 Replies Last reply Reply Quote 0
                  • JKnottJ
                    JKnott @F022Y
                    last edited by

                    @F022Y said in Lit Fibre (UK) IPv6 stopped after powercut:

                    Looks like my 3 cell connection doesn't support IPv6 so unable to test like that.

                    ????

                    IPv6 is mandatory for 4G & 5G, though some companies do a poor job with it for tethered devices. What happens if you do that IPv6 test from the phone?

                    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...

                    F022YF 1 Reply Last reply Reply Quote 0
                    • JKnottJ
                      JKnott @F022Y
                      last edited by

                      @F022Y

                      That packet capture shows you're pinging a link local address:

                      4c4d37d3-ed9b-42ff-800c-e29b5bb83438-image.png

                      Are you pinging the ISPs MAC on the WAN interface? Or something on your local LAN? Link local packets do not pass through a router, so it has to be something directly connected to whichever network you're on.

                      In that traceroute, I see 4 successful hops, then nothing. This could indicate a routing problem beyond that last one.

                      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
                      • F022YF
                        F022Y @JKnott
                        last edited by

                        @JKnott android on 4G and any attempts to ping or routetrace bbc.co.uk it defaults to IPv4.

                        33d16491-0a6c-4f77-be29-08ad6175c512-image.png

                        e06e1778-df60-44ae-b9ba-ce7be224f7f5-image.png

                        Address i'm pinging is either bbc or netgate i'll do another now pinging bbc.co.uk...........

                        Just for giggles i've done 2 for comparison.

                        Capture the LAN port
                        packetcapture-igc0-20250318212104.pcap

                        Capture the WAN port
                        packetcapture-igc1-20250318211922.pcap

                        JKnottJ 1 Reply Last reply Reply Quote 0
                        • JKnottJ
                          JKnott @F022Y
                          last edited by

                          @F022Y said in Lit Fibre (UK) IPv6 stopped after powercut:

                          android on 4G and any attempts to ping or routetrace bbc.co.uk it defaults to IPv4.

                          Try test-ipv6.com. You should have IPv6 with 4G. However, your cell company may be preventing tethering from working.

                          Also, you should be trying this when connected to the cell network and not your WiFi, as the pfSense problem would affect it too.

                          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...

                          F022YF 1 Reply Last reply Reply Quote 0
                          • F022YF
                            F022Y @JKnott
                            last edited by F022Y

                            @JKnott just tested, WiFi off and still not playing

                            Image doesn't want to appear so I'll share when back on desktop.

                            441aaedb-d9b9-409e-b97c-046219ae56dc-image.png alt text

                            GertjanG JKnottJ 2 Replies Last reply Reply Quote 0
                            • GertjanG
                              Gertjan @F022Y
                              last edited by

                              @F022Y

                              Wow, that's imho quiet unique : an Phone 4G/5G ISP without IPv6 ... ?

                              What does this mean :

                              ee58656c-1cf0-409e-8c8f-31b4858e1751-image.png

                              as I always considered that "test-ipv6.com" is clean and exempt of publicity or other stiff.

                              No "help me" PM's please. Use the forum, the community will thank you.
                              Edit : and where are the logs ??

                              F022YF 1 Reply Last reply Reply Quote 0
                              • F022YF
                                F022Y @Gertjan
                                last edited by

                                @Gertjan it's brave browser so the left icon is that the the inbuilt "shields" are active the right one is Brave rewards.

                                GertjanG 1 Reply Last reply Reply Quote 0
                                • GertjanG
                                  Gertjan @F022Y
                                  last edited by Gertjan

                                  @F022Y

                                  Yeah, get that
                                  And why the red triangle with the warning ?
                                  "test-ipv6.com is script based, and the script ... tests the IPv6 capabilities. If something failed, it shows you are IPv4 only, and maybe this isn't the case.

                                  I find it still hard to believe yo use a phone connection without IPv6 ... There are no free IPv6 IPv4 ! left, no where, and people didn't stop buying phones, so IPv6 isn't really an option these days.

                                  Are you sure IPv6 isn't disabled in your phone ? Just asking, as I don't recognize what phone OS you are using, it doesn't look like mine.

                                  No "help me" PM's please. Use the forum, the community will thank you.
                                  Edit : and where are the logs ??

                                  F022YF 1 Reply Last reply Reply Quote 0
                                  • F022YF
                                    F022Y @Gertjan
                                    last edited by F022Y

                                    @Gertjan sorry not following.

                                    The right icon, the triangle is brave rewards so the warning is that brave rewards is not contributing to the page.

                                    "I find it still hard to believe yo use a phone connection without IPv6 ... There are no free IPv6 left, no where, and people didn't stop buying phones, so IPv6 isn't really an option these days."

                                    I presume you meant IPv4 here?

                                    As for phone OS, bog standard Android 15 with March security patches on a pixel 9 pro and ipv6 is enabled as test-ipv6.com worked fine when fibre service was.

                                    GertjanG 1 Reply Last reply Reply Quote 0
                                    • GertjanG
                                      Gertjan @F022Y
                                      last edited by Gertjan

                                      @F022Y said in Lit Fibre (UK) IPv6 stopped after powercut:

                                      I presume you meant IPv4 here?

                                      👍
                                      Great, yeah, you're right.

                                      edit : your phone OS seems recent.
                                      So it's your "phone data carrier ISP" ....
                                      Very soon, they will have IPv6 - or leave the market.

                                      No "help me" PM's please. Use the forum, the community will thank you.
                                      Edit : and where are the logs ??

                                      1 Reply Last reply Reply Quote 0
                                      • JKnottJ
                                        JKnott @F022Y
                                        last edited by

                                        @F022Y said in Lit Fibre (UK) IPv6 stopped after powercut:

                                        Image doesn't want to appear so I'll share when back on desktop.

                                        That's surprising. That's on your cell network, not WiFi?

                                        Maybe you should ask your cell carrier about that. Also, depending on your plan, you may or may not have tethering. You can ask about that too.

                                        As I said yesterday, I suspect your IPv6 problem may be due to the work your ISP is doing to merge companies. Maybe you can ask them about that too.

                                        The reason the cell networks are supposed to have IPv6 is they're moving to VoIP, with VoLTE on 4G and VoNR on 5G. That requires a network working the way the network gods intended, without crap like NAT getting in the way.

                                        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...

                                        F022YF 1 Reply Last reply Reply Quote 0
                                        • F022YF
                                          F022Y @JKnott
                                          last edited by

                                          @JKnott Must admit i was expecting it too lol

                                          Yes thats just on cellular with the wifi disabled. Tethering works fine but same result

                                          ba397713-245b-46e9-9558-51f7d0e0a1c5-image.png

                                          I've dropped an email to their support and referenced this forum post

                                          1 Reply Last reply Reply Quote 0
                                          • F022YF
                                            F022Y
                                            last edited by F022Y

                                            Got my first response.

                                            80bce3c3-8c73-4de3-98d6-6fcce1066429-image.png

                                            I have advised that traceroutes are hitting an address outside of my local range so see what is said.

                                            Does it matter at all that the service is CG-Nat but i pay for a static IPv4? CG-Nat isn't something i'm hugely familar with

                                            JKnottJ GertjanG 2 Replies Last reply Reply Quote 0
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