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    “Default deny” rules в журнале

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    • werterW
      werter
      last edited by

      @lucas1
      https://docs.netgate.com/pfsense/en/latest/hardware/tuning-and-troubleshooting-network-cards.html

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      • P
        pigbrother @lucas1
        last edited by

        @lucas1 said in “Default deny” rules в журнале:

        cksum 0x1c65 (incorrect -> 0x32e5)

        pfSense виртуализирована? Если да - hardware checksum offload отключали?
        https://docs.netgate.com/pfsense/en/latest/virtualization/virtualizing-pfsense-with-proxmox.html

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        • L
          lucas1 @Konstanti
          last edited by

          @Konstanti
          Включение опции Hardware Checksum Offloading частично помогло. Сейчас Default Deny в журнале вообще нет.
          Запустил Wireshark на проблемном сервере.

          13 6.547774 IP.IP.IP.10 216.58.220.100 TCP 66 [TCP Dup ACK 9#2] 55643?80 [ACK] Seq=1 Ack=1 Win=29312 Len=0 TSval=19536649 TSecr=1347876636
          14 8.532081 IP.IP.IP.10 216.58.220.100 TCP 82 [TCP segment of a reassembled PDU]
          15 8.781690 IP.IP.IP.10 216.58.220.100 TCP 82 [TCP Retransmission] 55643?80 [PSH, ACK] Seq=1 Ack=1 Win=29312 Len=16 TSval=19537208 TSecr=1347876636
          16 9.033636 IP.IP.IP.10 216.58.220.100 TCP 82 [TCP Retransmission] 55643?80 [PSH, ACK] Seq=1 Ack=1 Win=29312 Len=16 TSval=19537271 TSecr=1347876636
          17 9.453382 IP.IP.IP.10 216.58.220.100 TCP 82 [TCP Retransmission] [TCP segment of a reassembled PDU]
          18 9.537284 IP.IP.IP.10 216.58.220.100 TCP 82 [TCP Retransmission] 55643?80 [PSH, ACK] Seq=1 Ack=1 Win=29312 Len=16 TSval=19537397 TSecr=1347876636
          19 10.544897 IP.IP.IP.10 216.58.220.100 TCP 82 [TCP Retransmission] 55643?80 [PSH, ACK] Seq=1 Ack=1 Win=29312 Len=16 TSval=19537649 TSecr=1347876636
          20 10.545286 216.58.220.100 IP.IP.IP.10 TCP 74 [TCP Spurious Retransmission] 80?55643 [SYN, ACK] Seq=0 Ack=1 Win=42540 Len=0 MSS=1402 SACK_PERM=1 TSval=1347883098 TSecr=19536021 WS=128

          Постоянные ошибки Dup, reassembled PDU, Retransmission.
          Не понял почему Capture на самом PfSense такое не показывает.

          Виртуализирован проблемный сервер. Ну как проблемный - с этой частной проблемой.

          K P 2 Replies Last reply Reply Quote 0
          • K
            Konstanti @lucas1
            last edited by Konstanti

            @lucas1 said in “Default deny” rules в журнале:

            216.58.220.100 IP.IP.IP.10

            Показали бы все , проще было бы анализ проводить

            Надо на pf захватить трафик и выгрузить его в виде pcap файла (не хотите его публично выложить , пришлите на почту)
            и ifconfig -m желателен ( в очередной раз повторяю, сразу было бы видно , что и как у Вас на сетевых интерфейсах настроено )
            а почему mss такой маленький ? через туннель какой-то устанавливается соединение ?
            Какие доп пакеты установлены ?
            PfblockerNG установлен ?
            Недавно в англоязычной части форума рассматривали похожий случай , отключили этот пакет ,и все заработало

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            • P
              pigbrother @lucas1
              last edited by

              @lucas1 said in “Default deny” rules в журнале:

              Включение опции Hardware Checksum Offloading частично помогло.

              Hardware Checksum Offloading надо выключить. Или вы описАлись?

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              • L
                lucas1 @Konstanti
                last edited by

                @Konstanti
                Pfblocker и Snort установлены. Snort и DNSBL выкл. - одинаково. IP - еще нет.
                Без Hardware Checksum Offloading checked все выглядит еще хуже.
                Не понял на форуме где найти адрес вашей почты.

                P K 2 Replies Last reply Reply Quote 0
                • werterW
                  werter
                  last edited by

                  @lucas1
                  Что за железо? Что за гипер исп-ся? У меня на KVM при всех Disabled HW offloading на сетевых проблем НЕТ на 10 PVE.

                  Если сервер умеет vt-d\ iommu - на время пробростьте полностью сетевую в ВМ. Если и при этом будет косяк - разбирайтесь с железом.
                  ЗЫ. А может ваше железо умеет и SR-IOV - тогда еще проще.

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                  • P
                    pigbrother @lucas1
                    last edited by pigbrother

                    @lucas1 said in “Default deny” rules в журнале:

                    Без Hardware Checksum Offloading checked все выглядит еще хуже.

                    Отключение Hardware Checksum Offloading вообще-то "золотой стандарт" при виртуализации pfSense с практически любым гипервизором.
                    Тут регулярно всплывают проблемы связанные с его неотключением, вплоть до не работающего банального port forward.
                    Странно, что у вас это не так.

                    @lucas1 said in “Default deny” rules в журнале:

                    Не понял на форуме где найти адрес вашей почты.

                    Ее там нет. Виртуализацию использую, Но для pfSense - реальное железо.
                    Главный виртуализатор тут @werter

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                    • K
                      Konstanti @lucas1
                      last edited by

                      @lucas1 Отключите пакеты и посмотрите , что будет
                      Адрес напишу в личку

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                      • L
                        lucas1 @Konstanti
                        last edited by

                        @Konstanti
                        Выключал Pfblocker. останавливал Snort - результат тот же.
                        Кстати выглядит сейчас так на сервере через Wireshark:

                        7008","22.126605","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 6989#9] 52287 > 80 [ACK] Seq=316 Ack=4894561 Win=365568 Len=0"
                        "7009","22.126646","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 6989#10] 52287 > 80 [ACK] Seq=316 Ack=4894561 Win=365568 Len=0"
                        "7010","22.126795","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5245921 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7011","22.126844","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 6989#11] 52287 > 80 [ACK] Seq=316 Ack=4894561 Win=365568 Len=0"
                        "7012","22.126879","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5247361 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7013","22.126923","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 6989#12] 52287 > 80 [ACK] Seq=316 Ack=4894561 Win=365568 Len=0"
                        "7014","22.152374","dd.ddd.167.25","X.Y.16.80","TCP","1494","[TCP Out-Of-Order] 80 > 52287 [ACK] Seq=4894561 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7015","22.152499","X.Y.16.80","dd.ddd.167.25","TCP","54","52287 > 80 [ACK] Seq=316 Ack=4911841 Win=358400 Len=0"
                        "7016","22.152549","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5248801 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7017","22.152561","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5250241 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7018","22.152595","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 7015#1] 52287 > 80 [ACK] Seq=316 Ack=4911841 Win=358400 Len=0"
                        "7019","22.152631","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 7015#2] 52287 > 80 [ACK] Seq=316 Ack=4911841 Win=358400 Len=0"
                        "7020","22.152659","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5251681 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7021","22.152688","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 7015#3] 52287 > 80 [ACK] Seq=316 Ack=4911841 Win=358400 Len=0"
                        "7022","22.152724","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5253121 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7023","22.152755","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 7015#4] 52287 > 80 [ACK] Seq=316 Ack=4911841 Win=358400 Len=0"
                        "7024","22.152847","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5254561 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7025","22.152877","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 7015#5] 52287 > 80 [ACK] Seq=316 Ack=4911841 Win=358400 Len=0"
                        "7026","22.152924","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5256001 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7027","22.152964","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 7015#6] 52287 > 80 [ACK] Seq=316 Ack=4911841 Win=358400 Len=0"
                        "7028","22.153021","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5257441 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7029","22.153043","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 7015#7] 52287 > 80 [ACK] Seq=316 Ack=4911841 Win=358400 Len=0"
                        "7030","22.179272","dd.ddd.167.25","X.Y.16.80","TCP","1494","[TCP Out-Of-Order] 80 > 52287 [ACK] Seq=4911841 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7031","22.179384","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5258881 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7032","22.179417","X.Y.16.80","dd.ddd.167.25","TCP","54","52287 > 80 [ACK] Seq=316 Ack=4927681 Win=348416 Len=0"
                        "7033","22.179456","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5260321 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7034","22.179489","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 7032#1] 52287 > 80 [ACK] Seq=316 Ack=4927681 Win=348416 Len=0"
                        "7035","22.179531","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5261761 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7036","22.179553","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 7032#2] 52287 > 80 [ACK] Seq=316 Ack=4927681 Win=348416 Len=0"
                        "7037","22.179645","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5263201 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7038","22.179694","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 7032#3] 52287 > 80 [ACK] Seq=316 Ack=4927681 Win=348416 Len=0"
                        "7039","22.179779","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5264641 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7040","22.179810","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 7032#4] 52287 > 80 [ACK] Seq=316 Ack=4927681 Win=348416 Len=0"
                        "7041","22.179883","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5266081 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7042","22.179920","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 7032#5] 52287 > 80 [ACK] Seq=316 Ack=4927681 Win=348416 Len=0"
                        "7043","22.180017","dd.ddd.167.25","X.Y.16.80","TCP","1494","80 > 52287 [ACK] Seq=5267521 Ack=316 Win=30336 Len=1440 [TCP segment of a reassembled PDU]"
                        "7044","22.180041","X.Y.16.80","dd.ddd.167.25","TCP","54","[TCP Dup ACK 7032#6] 52287 > 80 [ACK] Seq=316 Ack=4927681 Win=348416 Len=0"
                        "7045","22.439852","dd.ddd.167.25","X.Y.16.80","TCP","1494","[TCP Retransmission] 80 > 52287 [ACK] Seq=4927681 Ack=316 Win=30336 Len=1440"
                        "7046","22.499467","X.Y.16.80","dd.ddd.167.25","TCP","54","52287 > 80 [ACK] Seq=316 Ack=4944961 Win=345600 Len=0"
                        "7047","22.999778","dd.ddd.167.25","X.Y.16.80","TCP","1494","[TCP Retransmission] 80 > 52287 [ACK] Seq=4944961 Ack=316 Win=30336 Len=1440"
                        "7048","23.062031","X.Y.16.80","dd.ddd.167.25","TCP","54","52287 > 80 [ACK] Seq=316 Ack=4960801 Win=345600 Len=0"
                        "7049","24.019738","dd.ddd.167.25","X.Y.16.80","TCP","1494","[TCP Retransmission] 80 > 52287 [ACK] Seq=4960801 Ack=316 Win=30336 Len=1440"

                        На PfSense все вроде correct:

                        23:56:42.003041 00:03:47:98:1b:80 > 76:49:50:73:85:f7, ethertype IPv4 (0x0800), length 1494: (tos 0x28, ttl 56, id 11840, offset 0, flags [DF], proto TCP (6), length 1480)
                        DD.DDD.167.25.80 > X.Y.16.80.52287: Flags [.], cksum 0x9954 (correct), seq 1123201:1124641, ack 316, win 237, length 1440: HTTP
                        23:56:42.003152 00:03:47:98:1b:80 > 76:49:50:73:85:f7, ethertype IPv4 (0x0800), length 1494: (tos 0x28, ttl 56, id 11841, offset 0, flags [DF], proto TCP (6), length 1480)
                        DD.DDD.167.25.80 > X.Y.16.80.52287: Flags [.], cksum 0x0578 (correct), seq 1124641:1126081, ack 316, win 237, length 1440: HTTP
                        23:56:42.003162 76:49:50:73:85:f7 > 00:03:47:98:1b:80, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 128, id 1183, offset 0, flags [DF], proto TCP (6), length 40)
                        X.Y.16.80.52287 > DD.DDD.167.25.80: Flags [.], cksum 0x9d2d (correct), seq 316, ack 1120321, win 1507, length 0
                        23:56:42.003272 00:03:47:98:1b:80 > 76:49:50:73:85:f7, ethertype IPv4 (0x0800), length 1494: (tos 0x28, ttl 56, id 11842, offset 0, flags [DF], proto TCP (6), length 1480)
                        DD.DDD.167.25.80 > X.Y.16.80.52287: Flags [.], cksum 0x3a35 (correct), seq 1126081:1127521, ack 316, win 237, length 1440: HTTP
                        23:56:42.003390 00:03:47:98:1b:80 > 76:49:50:73:85:f7, ethertype IPv4 (0x0800), length 1494: (tos 0x28, ttl 56, id 11843, offset 0, flags [DF], proto TCP (6), length 1480)
                        DD.DDD.167.25.80 > X.Y.16.80.52287: Flags [.], cksum 0x5491 (correct), seq 1127521:1128961, ack 316, win 237, length 1440: HTTP

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                        • L
                          lucas1 @lucas1
                          last edited by

                          @lucas1
                          После изменения в guest OS на сервере виртуализации в свойствах сетевого интерфейса режима VirtLO на Intel E1000 все заработало нормально.

                          Записи Default Deny в журнале PfSense никак с этим не связаны.

                          Checked Disable hardware checksum offloading повлияло на журналирование Alerts Pfblocker DNSBL. Теперь там появляются записи, правда IF и Sourse - Unknown.
                          Но и это хорошо.

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