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    Haproxy - Mobile Networks in UK completely broken

    Scheduled Pinned Locked Moved General pfSense Questions
    45 Posts 3 Posters 3.4k Views
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    • VioletDragonV
      VioletDragon @stephenw10
      last edited by

      @stephenw10 when testing over Hotspot, websites loads just a blank white screen nothing else.

      Interestingly enough, websites randomly stops working too. Network connection was lost in Safari. Now I don’t know if this is a problem with the iPhone or not. I will test on android to see. It is very strange.

      I switched from Three network because the Network was so congested you couldn’t load any websites.

      I am beginning to wonder if this is more down to network congestion ?

      Regards

      1 Reply Last reply Reply Quote 0
      • VioletDragonV
        VioletDragon @johnpoz
        last edited by

        @johnpoz I have been looking for a app like this for awhile. All resolves in the app under DNS lookup.

        Regards

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

          At some point you were seeing DNS_PROBE_FINISHED_NXDOMAIN though?

          VioletDragonV 2 Replies Last reply Reply Quote 0
          • VioletDragonV
            VioletDragon @stephenw10
            last edited by

            @stephenw10 Yeah on odd occasions though. It is very strange.

            1 Reply Last reply Reply Quote 0
            • VioletDragonV
              VioletDragon @stephenw10
              last edited by

              @stephenw10 Just out of interest. Could it be the way the block of 8 IPs are being routed? I configured them as VIPs. Then on Haproxy it’s configured on just WAN?

              Regards

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

                That should be fine. If it was broken it would be broken for everything.

                VioletDragonV 1 Reply Last reply Reply Quote 0
                • VioletDragonV
                  VioletDragon @stephenw10
                  last edited by

                  @stephenw10 yeah thought so. Just tested it on an android phone. It all seems to be working apart from one of the services I host but no one else is having the issue.

                  Problem I have right now, is that no that I know can reproduce the problem there end. So I am not sure where to go from here now.

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

                    I would send some traffic and see if it arrives at your WAN. That will tell you for sure if the mobile network is filtering it.

                    VioletDragonV 1 Reply Last reply Reply Quote 0
                    • VioletDragonV
                      VioletDragon @stephenw10
                      last edited by

                      @stephenw10 What would you use for that ? Wire shark ?

                      Regards

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

                        Run a pcap in pfSense initially just to see if anything arrives. Filter it by the mobile IP you're testing from. That's easier if you get a real IP. I know 3UK still give you a real address.

                        VioletDragonV 1 Reply Last reply Reply Quote 1
                        • VioletDragonV
                          VioletDragon @stephenw10
                          last edited by

                          @stephenw10 Tested with pcap and used Wireshark to read the packet capture, I am seeing a lot of re-transmissions on Public facing WAN, I tested internally to see if i get the re-transmissions and I can say it's only on the Public facing WAN side.

                          Regards

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

                            You saw retransmissions from the remote test client coming into your WAN?

                            That implies haproxy did not reply to them. Or the replies never arrived.

                            VioletDragonV 1 Reply Last reply Reply Quote 0
                            • VioletDragonV
                              VioletDragon @stephenw10
                              last edited by

                              @stephenw10 I've had a few friends test on both Celluar and DSL. The capture shows a lot of Re-transmissions going out and In I believe. It is worst on Celluar than DSL though but i guess that makes sense.

                              217.45 is one of my Static IPs, 82.13 is a friends Virgin Internet connection, You can see there is a couple of Re-Transmissions, now I dunno if this is causing a problem or not.

                              Screenshot from 2024-04-22 16-01-24.png

                              Regards

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

                                Ok the duplicated ACKs there imply the remote host is not seeing the packets pfSense is sending, and re-sending. For some reason.

                                I assume that remote host is seeing problems connecting the site hosted at that static IP.

                                VioletDragonV 1 Reply Last reply Reply Quote 0
                                • VioletDragonV
                                  VioletDragon @stephenw10
                                  last edited by

                                  @stephenw10 The client seems to connect to Nextcloud okay, and download files, one thing i have noticed is there are poor speeds out of the WAN too, I have a 18meg up speed but the Client is only seeing 1mbp down when downloading a file.

                                  What would you suggest to do next? because i am complexed by this.

                                  Regards

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

                                    I would test at the client end to confirm that when it's sending ACKs like that it isn't seeing the packets we are sending.

                                    Then I would probably try setting a much lower MTU/MSS on something and see if that makes any difference.

                                    VioletDragonV 1 Reply Last reply Reply Quote 0
                                    • VioletDragonV
                                      VioletDragon @stephenw10
                                      last edited by

                                      @stephenw10 Yeah MTU is set to 1492 and MSS is to 1407 these are what BT Business recommends. I mean you think adjusting will help?

                                      Regards

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

                                        I have seen networks failing to pass packets that large and also failing to send the required ICMP-packet-too-large replies. So yes I would try 1300 to be sure.

                                        You can see the packets pfSense is sending at 1411 but I believe that's the frame size. That's neither 1492 or 1407 though.

                                        But pcap at the remote side first to be sure they are not reaching it.

                                        johnpozJ 1 Reply Last reply Reply Quote 1
                                        • johnpozJ
                                          johnpoz LAYER 8 Global Moderator @stephenw10
                                          last edited by johnpoz

                                          @stephenw10 1411 is odd frame size for a 1500 mtu.. Wireshark would normally show those as 1514.. If it was a full frame

                                          So 1411 is either not a full frame or the mtu is not 1500.

                                          An intelligent man is sometimes forced to be drunk to spend time with his fools
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                                          • stephenw10S
                                            stephenw10 Netgate Administrator
                                            last edited by

                                            Exactly. And it's not anything I'd expected from setting MSS to 1407 either. Implying something in the route the is running a low MTU and sending back ICMP notices. But maybe not low enough.

                                            But also 1407 seems like a weird value for that. I'd double check it.

                                            VioletDragonV 1 Reply Last reply Reply Quote 0
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