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IKEv2 Site-to-Site and MultiWAN on one side

IPsec
ipsec ddns multi-wan issue
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  • S
    stephenw10 Netgate Administrator
    last edited by Oct 10, 2024, 4:22 PM

    OK that looks like the other end is not seeing the replies for some reason.

    Check the state table at both ends.

    Which end are those logs from?

    P 1 Reply Last reply Oct 10, 2024, 4:24 PM Reply Quote 0
    • P
      patrick.pesegodinski @stephenw10
      last edited by Oct 10, 2024, 4:24 PM

      @stephenw10 This is the side that has the two wans.

      1 Reply Last reply Reply Quote 0
      • S
        stephenw10 Netgate Administrator
        last edited by Oct 10, 2024, 4:31 PM

        Ok so it sees the incoming request on the correct WAN and replies but the other end never sees that reply because it just sends the initial request again.

        So either that reply is not actually being sent or it's send incorrectly somehow. Or something in the route is blocking it.

        I'd first check the state tables at each end. If that doesn't show something obvious then run a pcap at both ends to confirm replies are being sent and received.

        P 1 Reply Last reply Oct 10, 2024, 4:36 PM Reply Quote 0
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          patrick.pesegodinski @stephenw10
          last edited by Oct 10, 2024, 4:36 PM

          @stephenw10 The table pfsense with two wan:

          login-to-view

          The table other pfsense:

          login-to-view

          1 Reply Last reply Reply Quote 0
          • S
            stephenw10 Netgate Administrator
            last edited by Oct 10, 2024, 4:51 PM

            OK so never makes it to the firewall state at the remote end.

            Run pcaps and make sure it's leaving the multiwan end correctly.

            1 Reply Last reply Reply Quote 0
            • S
              stephenw10 Netgate Administrator
              last edited by Oct 10, 2024, 4:52 PM

              You might also try just pinging between those sites using that WAN as source and see if it gets to the remote side as expected.

              P 1 Reply Last reply Oct 10, 2024, 5:11 PM Reply Quote 0
              • P
                patrick.pesegodinski @stephenw10
                last edited by Oct 10, 2024, 5:11 PM

                @stephenw10
                I think I found the problem. I was using this configuration:

                login-to-view

                Because I used 0.0.0.0 in remote gateway.

                After I switched to, it worked.

                login-to-view

                1 Reply Last reply Reply Quote 0
                • S
                  stephenw10 Netgate Administrator
                  last edited by Oct 10, 2024, 5:14 PM

                  You should be able to use ASN at both ends as long as it all matches.

                  P 1 Reply Last reply Oct 10, 2024, 5:22 PM Reply Quote 0
                  • P
                    patrick.pesegodinski @stephenw10
                    last edited by Oct 10, 2024, 5:22 PM

                    @stephenw10 With ASN, the tunnel only connects to the WAN with tier1.

                    I block the ping protocol on both WANs for external requests, could this affect the IPsec request?

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                    • S
                      stephenw10 Netgate Administrator
                      last edited by Oct 10, 2024, 5:25 PM

                      Does that ASN resolve to the other WAN IP perhaps?

                      P 1 Reply Last reply Oct 10, 2024, 5:46 PM Reply Quote 0
                      • P
                        patrick.pesegodinski @stephenw10
                        last edited by Oct 10, 2024, 5:46 PM

                        @stephenw10 I think so.

                        How do I test?

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                        • S
                          stephenw10 Netgate Administrator
                          last edited by Oct 10, 2024, 6:52 PM

                          Just try to resolve it somewhere. In Diag > DNS Lookup in pfSense for example.

                          If you use an IP address or something actually resolves it must match the actual address IPSec is using.

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