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    Can't ping from GUI, unstable game server connection, gateway monitoring does not work

    Scheduled Pinned Locked Moved General pfSense Questions
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    • AlexanderOFA Offline
      AlexanderOF @stephenw10
      last edited by

      I can ping the gateway from a client on the LAN side, that's correct. Should i disable hardware checksum offloading?

      AlexanderOFA 1 Reply Last reply Reply Quote 0
      • AlexanderOFA Offline
        AlexanderOF @AlexanderOF
        last edited by AlexanderOF

        As of this day, I can't find a solution to the ping problems I have:

        As of the unstable game server connection, i managed to fix this by disconnecting a PC with a problematic NIC that was causing some problems.

        Here is the Packet Capture results for anybody that knows and can help:

        --------------------------------
        Packet Capture On WAN
        --------------------------------

        11:15:34.921725 a0:36:9f:05:1e:a2 > 0c:b9:12:05:6b:80, ethertype IPv4 (0x0800), length 43: (tos 0x0, ttl 64, id 20094, offset 0, flags [none], proto ICMP (1), length 29)
        192.168.100.2 > 192.168.100.1: ICMP echo request, id 1650, seq 5427, length 9
        11:15:34.922009 0c:b9:12:05:6b:80 > a0:36:9f:05:1e:a2, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 64, id 45511, offset 0, flags [none], proto ICMP (1), length 29)
        192.168.100.1 > 192.168.100.2: ICMP echo reply, id 1650, seq 5427, length 9 (wrong icmp cksum ffff (->e45a)!)
        11:15:35.424477 a0:36:9f:05:1e:a2 > 0c:b9:12:05:6b:80, ethertype IPv4 (0x0800), length 43: (tos 0x0, ttl 64, id 52722, offset 0, flags [none], proto ICMP (1), length 29)
        192.168.100.2 > 192.168.100.1: ICMP echo request, id 1650, seq 5428, length 9
        11:15:35.424801 0c:b9:12:05:6b:80 > a0:36:9f:05:1e:a2, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 64, id 45512, offset 0, flags [none], proto ICMP (1), length 29)
        192.168.100.1 > 192.168.100.2: ICMP echo reply, id 1650, seq 5428, length 9 (wrong icmp cksum ffff (->e459)!)
        11:15:35.925787 a0:36:9f:05:1e:a2 > 0c:b9:12:05:6b:80, ethertype IPv4 (0x0800), length 43: (tos 0x0, ttl 64, id 48387, offset 0, flags [none], proto ICMP (1), length 29)
        192.168.100.2 > 192.168.100.1: ICMP echo request, id 1650, seq 5429, length 9
        11:15:35.926037 0c:b9:12:05:6b:80 > a0:36:9f:05:1e:a2, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 64, id 45513, offset 0, flags [none], proto ICMP (1), length 29)
        192.168.100.1 > 192.168.100.2: ICMP echo reply, id 1650, seq 5429, length 9 (wrong icmp cksum ffff (->e458)!)
        11:15:36.426986 a0:36:9f:05:1e:a2 > 0c:b9:12:05:6b:80, ethertype IPv4 (0x0800), length 43: (tos 0x0, ttl 64, id 3152, offset 0, flags [none], proto ICMP (1), length 29)

        ----------------------------
        Some more information
        ----------------------------

        LAN --> PfSense --> Modem / Router (with DMZ for PfSense)

        I send the ping from WAN and get no responce... Seems wierd. If i ping from LAN, still the same... If I Try to ping my Gateway (Modem/Router) from a computer on LAN, i get a responce... That's strange...

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        • stephenw10S Offline
          stephenw10 Netgate Administrator
          last edited by

          That pcap is on the WAN an those are the pfSense gateway monitoring pings? (the 0.5s interval looks like it is).
          You should definitely try disabling checksum off loading as a test. Hard to imagine that being a problem on an i350 but...
          That's in Sys > Adv > Networking.

          Steve

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          • AlexanderOFA Offline
            AlexanderOF @stephenw10
            last edited by

            Turned off checksum offloading, still the same issue

            18:24:33.524284 a0:36:9f:05:1e:a2 > 0c:b9:12:05:6b:80, ethertype IPv4 (0x0800), length 43: (tos 0x0, ttl 64, id 57871, offset 0, flags [none], proto ICMP (1), length 29)
            192.168.100.2 > 192.168.100.1: ICMP echo request, id 40946, seq 883, length 9
            18:24:33.524538 0c:b9:12:05:6b:80 > a0:36:9f:05:1e:a2, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 64, id 31165, offset 0, flags [none], proto ICMP (1), length 29)
            192.168.100.1 > 192.168.100.2: ICMP echo reply, id 40946, seq 883, length 9 (wrong icmp cksum ffff (->5c9a)!)
            18:24:34.026282 a0:36:9f:05:1e:a2 > 0c:b9:12:05:6b:80, ethertype IPv4 (0x0800), length 43: (tos 0x0, ttl 64, id 57893, offset 0, flags [none], proto ICMP (1), length 29)
            192.168.100.2 > 192.168.100.1: ICMP echo request, id 40946, seq 884, length 9
            18:24:34.026550 0c:b9:12:05:6b:80 > a0:36:9f:05:1e:a2, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 64, id 31166, offset 0, flags [none], proto ICMP (1), length 29)
            192.168.100.1 > 192.168.100.2: ICMP echo reply, id 40946, seq 884, length 9 (wrong icmp cksum ffff (->5c99)!)
            18:24:34.527551 a0:36:9f:05:1e:a2 > 0c:b9:12:05:6b:80, ethertype IPv4 (0x0800), length 43: (tos 0x0, ttl 64, id 41793, offset 0, flags [none], proto ICMP (1), length 29)
            192.168.100.2 > 192.168.100.1: ICMP echo request, id 40946, seq 885, length 9
            18:24:34.527796 0c:b9:12:05:6b:80 > a0:36:9f:05:1e:a2, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 64, id 31167, offset 0, flags [none], proto ICMP (1), length 29)
            192.168.100.1 > 192.168.100.2: ICMP echo reply, id 40946, seq 885, length 9 (wrong icmp cksum ffff (->5c98)!)
            18:24:35.029281 a0:36:9f:05:1e:a2 > 0c:b9:12:05:6b:80, ethertype IPv4 (0x0800), length 43: (tos 0x0, ttl 64, id 5582, offset 0, flags [none], proto ICMP (1), length 29)
            192.168.100.2 > 192.168.100.1: ICMP echo request, id 40946, seq 886, length 9
            18:24:35.029547 0c:b9:12:05:6b:80 > a0:36:9f:05:1e:a2, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 64, id 31168, offset 0, flags [none], proto ICMP (1), length 29)

            I can provide the whole cap file if you wish. I just don't want to spam the forums with the pcap output

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            • stephenw10S Offline
              stephenw10 Netgate Administrator
              last edited by

              Is it actually disabled? What does ifconfig -vvvma show for the WAN?

              AlexanderOFA 1 Reply Last reply Reply Quote 0
              • AlexanderOFA Offline
                AlexanderOF @stephenw10
                last edited by AlexanderOF

                igb0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
                description: Internet
                options=8100b8<VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,VLAN_HWFILTER>
                capabilities=f53fbb<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,JUMBO_MTU,VLAN_HWCSUM,TSO4,TSO6,LRO,WOL_UCAST,WOL_MCAST,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO,NETMAP,RXCSUM_IPV6,TXCSUM_IPV6>
                ether a0:36:9f:05:1e:a2
                inet6 fe80::a236:9fff:fe05:1ea2%igb0 prefixlen 64 scopeid 0x1
                inet 192.168.100.2 netmask 0xffffff00 broadcast 192.168.100.255
                media: Ethernet autoselect (1000baseT <full-duplex>)
                status: active
                supported media:
                media autoselect
                media 1000baseT
                media 1000baseT mediaopt full-duplex
                media 100baseTX mediaopt full-duplex
                media 100baseTX
                media 10baseT/UTP mediaopt full-duplex
                media 10baseT/UTP
                nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>

                Here is the output of the command.

                (Removed igb1 from the post, since you only asked for wan.)

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                • stephenw10S Offline
                  stephenw10 Netgate Administrator
                  last edited by

                  Hmm, yeah that all looks fine.

                  If you ping the gateway from something else behind pfSense and capture those packets do they show a bad checksum?

                  Hard to explain what you're seeing there...

                  Steve

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                  • AlexanderOFA Offline
                    AlexanderOF @stephenw10
                    last edited by

                    Seems like it doesn't

                    19:32:46.407862 a0:36:9f:05:1e:a2 > 0c:b9:12:05:6b:80, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 63, id 60933, offset 0, flags [DF], proto ICMP (1), length 84)
                    192.168.100.2 > 192.168.100.1: ICMP echo request, id 64834, seq 1, length 64
                    19:32:46.408197 0c:b9:12:05:6b:80 > a0:36:9f:05:1e:a2, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 39305, offset 0, flags [none], proto ICMP (1), length 84)
                    192.168.100.1 > 192.168.100.2: ICMP echo reply, id 64834, seq 1, length 64
                    19:32:47.421991 a0:36:9f:05:1e:a2 > 0c:b9:12:05:6b:80, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 63, id 61047, offset 0, flags [DF], proto ICMP (1), length 84)
                    192.168.100.2 > 192.168.100.1: ICMP echo request, id 64834, seq 2, length 64
                    19:32:47.422265 0c:b9:12:05:6b:80 > a0:36:9f:05:1e:a2, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 39306, offset 0, flags [none], proto ICMP (1), length 84)
                    192.168.100.1 > 192.168.100.2: ICMP echo reply, id 64834, seq 2, length 64
                    19:32:48.445945 a0:36:9f:05:1e:a2 > 0c:b9:12:05:6b:80, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 63, id 61302, offset 0, flags [DF], proto ICMP (1), length 84)
                    192.168.100.2 > 192.168.100.1: ICMP echo request, id 64834, seq 3, length 64
                    19:32:48.446194 0c:b9:12:05:6b:80 > a0:36:9f:05:1e:a2, ethertype IPv4 (0x0800), length 98: (tos 0x0, ttl 64, id 39307, offset 0, flags [none], proto ICMP (1), length 84)
                    192.168.100.1 > 192.168.100.2: ICMP echo reply, id 64834, seq 3, length 64

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                    • stephenw10S Offline
                      stephenw10 Netgate Administrator
                      last edited by

                      Hmm, well there is always the possibility that it is actually a bad checksum, though I've never seen that before. Except that the values it's showing imply it's not able to see a checksum at all:
                      wrong icmp cksum ffff

                      You tried swapping WAN to a different port?

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                      • AlexanderOFA Offline
                        AlexanderOF @stephenw10
                        last edited by

                        I am currently away from my machine, but can try this again when I am there. I think that the last time I tried this it did not work but I will swap them just to make sure

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                        • AlexanderOFA Offline
                          AlexanderOF @AlexanderOF
                          last edited by

                          By the way, is there any way I can fix a bad checksum on a card (if my card has a bad checksum)?

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                          • stephenw10S Offline
                            stephenw10 Netgate Administrator
                            last edited by

                            You can (somehow) end up with a bad firmware checksum on the card but that's not the same thing as being unable to read incoming packet checksums.
                            Hard to see what could cause that.

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                            • AlexanderOFA Offline
                              AlexanderOF @stephenw10
                              last edited by AlexanderOF

                              This post is deleted!
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                              • AlexanderOFA Offline
                                AlexanderOF @stephenw10
                                last edited by

                                I changed the WAN port and i still have the same issue. The WAN port is now the onboard intel lan that my motherboard has.

                                11:10:52.483720 70:85:c2:88:89:5f > 0c:b9:12:05:6b:80, ethertype IPv4 (0x0800), length 43: (tos 0x0, ttl 64, id 37908, offset 0, flags [none], proto ICMP (1), length 29)
                                192.168.100.2 > 192.168.100.1: ICMP echo request, id 42553, seq 654, length 9
                                11:10:52.484110 0c:b9:12:05:6b:80 > 70:85:c2:88:89:5f, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 64, id 2509, offset 0, flags [none], proto ICMP (1), length 29)

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                                • stephenw10S Offline
                                  stephenw10 Netgate Administrator
                                  last edited by stephenw10

                                  Well it's not showing a checksum error there now. But the firewall still doesn't show ping replies?

                                  Assuming that second packet is a reply, I think you missed the last line. Which might still show the error!

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                                  • AlexanderOFA Offline
                                    AlexanderOF @stephenw10
                                    last edited by

                                    Seems like I missed a line...

                                    18:39:02.151563 70:85:c2:88:89:5f > 0c:b9:12:05:6b:80, ethertype IPv4 (0x0800), length 43: (tos 0x0, ttl 64, id 38915, offset 0, flags [none], proto ICMP (1), length 29)
                                    192.168.100.2 > 192.168.100.1: ICMP echo request, id 42553, seq 54235, length 9
                                    18:39:02.151878 0c:b9:12:05:6b:80 > 70:85:c2:88:89:5f, ethertype IPv4 (0x0800), length 60: (tos 0x0, ttl 64, id 56090, offset 0, flags [none], proto ICMP (1), length 29)
                                    192.168.100.1 > 192.168.100.2: ICMP echo reply, id 42553, seq 54235, length 9 (wrong icmp cksum ffff (->85ea)!)
                                    18:39:02.652615 70:85:c2:88:89:5f > 0c:b9:12:05:6b:80, ethertype IPv4 (0x0800), length 43: (tos 0x0, ttl 64, id 12414, offset 0, flags [none], proto ICMP (1), length 29)

                                    Sorry about that

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                                    • stephenw10S Offline
                                      stephenw10 Netgate Administrator
                                      last edited by

                                      Hmm, Ok so that's a completely different NIC, not on the expansion card?

                                      And I assume ifconfig still shows checksum off-loading is disabled?

                                      And you cannot ping out to anywhere from the firewall?

                                      I'd probably re-install clean at that point just to be sure. A default install with an Intel NIC is close to guaranteed to work. It's hard to see what could be causing that.

                                      Steve

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                                      • AlexanderOFA Offline
                                        AlexanderOF @stephenw10
                                        last edited by AlexanderOF

                                        Correct, that NIC is the onboard one, not a port from my i350

                                        I tried a clean install before but it did not help with my issue..

                                        I can ping from my computer but i cannot ping from PfSense itself...

                                        Edit: Here is the config for em0

                                        em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
                                        description: Internet
                                        options=810098<VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,VLAN_HWFILTER>
                                        capabilities=953d9b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,LRO,WOL_UCAST,WOL_MCAST,WOL_MAGIC,VLAN_HWFILTER,VLAN_HWTSO,NETMAP>
                                        ether 70:85:c2:88:89:5f
                                        inet6 fe80::7285:c2ff:fe88:895f%em0 prefixlen 64 scopeid 0x3
                                        inet 192.168.100.2 netmask 0xffffff00 broadcast 192.168.100.255
                                        media: Ethernet autoselect (1000baseT <full-duplex>)
                                        status: active
                                        supported media:
                                        media autoselect
                                        media 1000baseT
                                        media 1000baseT mediaopt full-duplex
                                        media 100baseTX mediaopt full-duplex
                                        media 100baseTX
                                        media 10baseT/UTP mediaopt full-duplex
                                        media 10baseT/UTP
                                        nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL>

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                                        • stephenw10S Offline
                                          stephenw10 Netgate Administrator
                                          last edited by

                                          I mean really we can only conclude that the checksum really is bad and whatever is sending it is for some reason breaking it's own replies but only to the next hop.

                                          Try testing pfSense behind something else perhaps?

                                          Steve

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                                          • AlexanderOFA Offline
                                            AlexanderOF @stephenw10
                                            last edited by

                                            If i am correct, i should try testing PfSense with a different router (Instead of my provider's modem/router) ?

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