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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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    • 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

      AlexanderOFA 1 Reply Last reply Reply Quote 0
      • 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?

          AlexanderOFA 1 Reply Last reply Reply Quote 0
          • 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

            AlexanderOFA 1 Reply Last reply Reply Quote 0
            • 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.

                AlexanderOFA 2 Replies Last reply Reply Quote 0
                • 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!

                      AlexanderOFA 1 Reply Last reply Reply Quote 0
                      • 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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                                • stephenw10S Offline
                                  stephenw10 Netgate Administrator
                                  last edited by

                                  Yes, if you can. Or better, without the ISP's router at all.

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                                  • AlexanderOFA Offline
                                    AlexanderOF @stephenw10
                                    last edited by

                                    So, now I am using a TP-Link Archer D2 as my gateway. Unfortunatelly, my ISP won't let me change modem. I can ping the gateway but cannot ping anything behind it... Oh god....

                                    For example, I cannot ping 1.1.1.1... What a mess....

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                                    • stephenw10S Offline
                                      stephenw10 Netgate Administrator
                                      last edited by

                                      So from TP-Link or from pfSense?

                                      You put the TP-Link in between pfSense and the existing router?

                                      If not can you not use pfSense with the modem directly? So it gets a public IP on it's WAN.

                                      Steve

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                                      • AlexanderOFA Offline
                                        AlexanderOF @stephenw10
                                        last edited by AlexanderOF

                                        From PfSense I am able to ping my TP-Link Router but cannot ping anything else that's connected after my TP-Link router. At monday I will change my modem with a different model that my ISP offered to me, hope that fixes the problems...

                                        I ran a traceroute, PfSense sends the ping and never gets a reply back... Something ain't right

                                        It is really stupid that I have to go though this, because they do QoS on their modem and they won't let me change to another PON modem / router... Other ISPs in my area offer a GPON Terminal and let you hook up whatever router you want, but they do not offer the speeds that i need. Greece's internet ISPs are just terrible. I hope in the next 2 years things get better...

                                        Note: Can't really blame my ISP, I am using a internet connection for home users to host servers. My budget is really tight and I cannot afford to give 52 euro / month for a bridged connection.

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                                        • stephenw10S Offline
                                          stephenw10 Netgate Administrator
                                          last edited by

                                          Subnet conflict maybe? They need to be using unique subnets between each router.

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

                                            I don't think there is a Subnet Conflict

                                            Here are the subnets

                                            Modem: 192.168.100.1
                                            TP-Link: 192.168.200.1
                                            Pfsense: 192.168.2.1, 192.168.3.1

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