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    pfSense mangling packets?

    Scheduled Pinned Locked Moved General pfSense Questions
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    • stephenw10S
      stephenw10 Netgate Administrator
      last edited by

      Yup I just wanted to be sure you weren't testing that on some other Windows client.

      Are you policy routing all traffic from that server over the VPN? Including DNS?

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      • johnpozJ
        johnpoz LAYER 8 Global Moderator @stephenw10
        last edited by

        @stephenw10 another prime x-y problem example

        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

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          Tueem @stephenw10
          last edited by

          @stephenw10 No DNS is going over pfsense but I've set cloudflare and google dns. But except that all other traffic is routed through vpn

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

            @Tueem said in pfSense mangling packets?:

            No DNS is going over pfsense

            This can cause issues with stuff that is hosted in CDNs.. where you have one part of system pulling a dns from region X dns, and maybe the other end pulling from region Y.. And then for what your trying to do there ends of being a disconnect in who ends up talking to who up in the cloud, or talking from a different region that what is expected, etc.

            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

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            • stephenw10S
              stephenw10 Netgate Administrator
              last edited by

              Mmm, when you run the VPN client on the host I imagine it routes all traffic over the VPN and likely resets the host to se the VPN providers DNS. You should be able to check that on the host.

              I would try setting the DNS on the server to the same thing the VPN clients sets it to and then policy route all traffic from it over the VPN.

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                Tueem @stephenw10
                last edited by

                @stephenw10 That didn't help unfortunately

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                  Tueem @Tueem
                  last edited by Tueem

                  What might also be interesting is that TLS handshakes with some sites (according to firefox) take very long through the vpn and cause a timeout.

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

                    @Tueem said in pfSense mangling packets?:

                    with some sites (according to firefox)

                    How does this info present itself? While I don't run normally through a vpn, I do now and then testing stuff.. Not some service my own vpn that I run on a vps out on the internet, etc. And have never seen any such info presented..

                    Long handshakes through a vpn would get me concerned about a mitm on the cert or some sort of proxy doing a bump on the ssl.. While sure a vpn can add some latency to the connection. There should be nothing really different in the handshake time other than whatever latency your seeing through the vpn for all traffic.

                    Can you post up screenshot of how firefox is presenting that little tidbit of info?

                    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

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                      Tueem @johnpoz
                      last edited by

                      @johnpoz Its this pop-up in the bottom left I'm referring to:
                      c6731f28-336e-452a-a1e9-1596007bdcbd-image.png

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                      • stephenw10S
                        stephenw10 Netgate Administrator
                        last edited by

                        Try opening the Firefox debug console and looking at the network connections/timing while doing that.

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                          Tueem @stephenw10
                          last edited by

                          @stephenw10 Here is the entire log:
                          04e5adc4-a23d-448e-ba1c-87b0e045d290-image.png

                          As you can see the result is missing css

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                          • stephenw10S
                            stephenw10 Netgate Administrator
                            last edited by

                            It looks like you have a an adblocker and it's blocking the css file along with all the actual ads.

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                              Tueem @stephenw10
                              last edited by

                              @stephenw10 hmmm thats weird. I'm gonna ask the VPN provider because I definitely don't have one

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                                Tueem @stephenw10
                                last edited by

                                @stephenw10 I've asked the VPN provider and waiting for an answer but I don't think that will be the problem since im using google dns and the same issues happens if I use another Wireguard VPN. I'm guessing its some kind of wireguard problem

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                                • w0wW
                                  w0w @Tueem
                                  last edited by

                                  @Tueem
                                  Do you have IPv6 enabled and working?

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                                    Tueem @w0w
                                    last edited by

                                    @w0w no I don't

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                                      Tueem @Tueem
                                      last edited by

                                      @Tueem I just confirmed, it's definitely not the VPNs fault. I booted up a quick instance of OpenWrt and there having my server routed through the VPN works fine.

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                                      • w0wW
                                        w0w @Tueem
                                        last edited by

                                        @Tueem
                                        Interesting. I have similar issues with the same addresses 13.x.x.x and pfSense when I use a specific PPPoE connection, but the problem only arises when I use IPv6, which I also obtain via DHCP. Interestingly, everything works fine without pfSense in the loop. There must be something in pfSense itself, and in my case, IPv6 is just the trigger.

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                                        • stephenw10S
                                          stephenw10 Netgate Administrator
                                          last edited by

                                          Hmm, but you're not actually using IPv6 to reach it? And also over Wireguard?

                                          w0wW 1 Reply Last reply Reply Quote 0
                                          • T
                                            Tueem @Tueem
                                            last edited by Tueem

                                            I just wanted to throw in, that OpenVPN also works fine so I'm 99% sure there is something wrong with the wireguard plugin.

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