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    TCP issue inside the tunnel

    Scheduled Pinned Locked Moved IPsec
    12 Posts 2 Posters 1.3k Views
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    • K
      Konstanti @monster4000
      last edited by

      @monster4000

      Hey
      Need to see what show
      /diagnostics/ packet capture
      Interface Lan
      Host 10.9.96.4
      Protocol tcp
      Port tcp port inciga

      and we still need a file (download capture)

      1 Reply Last reply Reply Quote 0
      • M
        monster4000
        last edited by

        Hello

        I got the capture here.

        0_1549105719338_packetcapture.zip

        K 1 Reply Last reply Reply Quote 0
        • K
          Konstanti @monster4000
          last edited by Konstanti

          @monster4000
          The that in sight
          Is immediately reset the connection
          This error often occurs when the TCP port is closed
          There may be a firewall (10.9.96.4) that reject connections

          Capture Site B

          0_1549106181831_09468da0-86df-4859-af88-82d618a8a585-image.png

          Capture Site -A

          0_1549106245080_ebe1e9d0-f195-45d1-a56a-fbeb11aa0b77-image.png

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          • M
            monster4000
            last edited by

            Hello

            That seems strange to me:
            SiteB
            1_1549106526740_Site B.PNG
            SiteA
            0_1549106526739_Site A.PNG

            There is no firewall active on the linux servers.

            K 1 Reply Last reply Reply Quote 0
            • K
              Konstanti @monster4000
              last edited by Konstanti

              @monster4000

              There may be a firewall that drops connections (host 10.9.96.4)
              This host (10.0.96.4) is configured to accept connections only from specific networks ?

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              • M
                monster4000
                last edited by

                Hello

                i´ve have already check 10.9.96.4 for a firewall there is none.
                also tested with a fresh ubuntu machine it´s the same

                root@pmg:~# iptables --list
                Chain INPUT (policy ACCEPT)
                target     prot opt source               destination
                
                Chain FORWARD (policy ACCEPT)
                target     prot opt source               destination
                
                Chain OUTPUT (policy ACCEPT)
                target     prot opt source               destination
                
                
                K 2 Replies Last reply Reply Quote 0
                • K
                  Konstanti @monster4000
                  last edited by

                  @monster4000
                  I meant that Icinga is configured to accept connections only from certain networks

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                  • M
                    monster4000
                    last edited by

                    Hello

                    never heard of that, it uses ssl to check, but Rudder is using the network and have added that to the list :(

                    1 Reply Last reply Reply Quote 0
                    • K
                      Konstanti @monster4000
                      last edited by Konstanti

                      @monster4000 said in

                      There is still such an idea

                      1. mss clamping (both sides)
                        VPN/IPsec/Advanced Settings
                        0_1549107209109_bc21808e-677f-4681-a124-872a597d7632-image.png

                      2. System/Advanced/Networking (both sides)
                        0_1549107342669_bebb80b7-1053-4a47-8b95-8b207cb31f14-image.png

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                      • M
                        monster4000
                        last edited by monster4000

                        Hello
                        MSS seem to done the trick, what is MMS?
                        I already had the other change due to proxmox kvm

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                        • M
                          monster4000
                          last edited by

                          Hello

                          Just noticed it breaks large packets of UDP :( hopefully we will get fix soon.
                          https://redmine.pfsense.org/issues/7801

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