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    Netgate SG-3100 LAN ports cannot go through LAN Gateway.

    Scheduled Pinned Locked Moved General pfSense Questions
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    • stephenw10S
      stephenw10 Netgate Administrator
      last edited by

      When DHCP works but nothing else does my first thought is a missing firewall rule. But those rules look good. And with pf disabled you should always be able to reach the LAN IP.
      Also you should be able to ping out to a client on LAN with no rules in place.

      So then why is it not replying... a bad route perhaps or subnet conflct. But those also look good.

      So then we have mystery disappearing packets and that is usually either the IPSec daemon grabbing them or captive portal blocking that traffic in ipfw.
      Do you have either IPSec or Captive Portal configured?

      Steve

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      • M
        mmajian @johnpoz
        last edited by

        @johnpoz @stephenw10 No I don't see connected LAN client in the ARP table. I only the LAN itself.
        7e7db871-025d-4e3d-b701-05e1b62e5f65-image.png

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        • johnpozJ
          johnpoz LAYER 8 Global Moderator
          last edited by

          Well that going to be kind of problem answering something... But how did you sniff, you should of seen arp go out if pfsense did not know what it was..

          An intelligent man is sometimes forced to be drunk to spend time with his fools
          If you get confused: Listen to the Music Play
          Please don't Chat/PM me for help, unless mod related
          SG-4860 24.11 | Lab VMs 2.8, 24.11

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          • M
            mmajian @johnpoz
            last edited by

            @johnpoz @stephenw10 And I don't have either IPSec or Captive Portal configured. Here is my IPSec Advanced Settings:
            ec6a8c8e-c8ef-432c-8803-123650ea8cb1-image.png
            4ccb0f75-94f8-4855-96af-73b84fc02f29-image.png

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            • johnpozJ
              johnpoz LAYER 8 Global Moderator
              last edited by

              Well it would be impossible for pfsense to answer back if there is no mac for it to send the traffic too.

              So sniff when you ping the pfsense again, making sure your sniffing all.. You should see an arp... and answer

              An intelligent man is sometimes forced to be drunk to spend time with his fools
              If you get confused: Listen to the Music Play
              Please don't Chat/PM me for help, unless mod related
              SG-4860 24.11 | Lab VMs 2.8, 24.11

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              • kiokomanK
                kiokoman LAYER 8
                last edited by

                reinstall from scratch, who know what experimentation you did in the last two month to end like this, i think it would be faster even if it would be more fun to understand what is it :)

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                • M
                  mmajian @johnpoz
                  last edited by

                  @johnpoz I sorry what do you mean to sniff when ping pfSense.

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                  • stephenw10S
                    stephenw10 Netgate Administrator
                    last edited by

                    Run a packet capture on LAN. Set promiscuous mode. Leave the settings at 'any' to capture everything. Set, say, 1000 packets.
                    Connect the lan client and start pinging.

                    You should see the DHCP traffic at the very least.

                    If you see incoming ping requests and no replies you should see ARP requests instead if that client is still not in the ARP table.

                    Steve

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                    • kiokomanK
                      kiokoman LAYER 8
                      last edited by

                      and .. do you remember if you have made any changes inside System / Advanced / System Tunables ?

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                      we must focus on silencing this @guest character. we must make up lies and alter the copyrights !
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                      • M
                        mmajian @stephenw10
                        last edited by

                        @stephenw10 @johnpoz
                        Here is package capture: (LAN is 192.168.1.1, LAN client is 192.168.1.115)
                        packagecap.txt

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                        • M
                          mmajian @kiokoman
                          last edited by

                          @kiokoman I don't remember I changed that, here is mine:
                          e18c746f-58b4-4137-b2b8-2b760922a7bc-image.png

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                          • DerelictD
                            Derelict LAYER 8 Netgate @mmajian
                            last edited by

                            @mmajian said in Netgate SG-3100 LAN ports cannot go through LAN Gateway.:

                            @stephenw10 @johnpoz
                            Here is package capture: (LAN is 192.168.1.1, LAN client is 192.168.1.115)
                            packagecap.txt

                            If that packet capture is still available for download, download it and attach it.

                            Chattanooga, Tennessee, USA
                            A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                            DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                            Do Not Chat For Help! NO_WAN_EGRESS(TM)

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                            • M
                              mmajian @Derelict
                              last edited by

                              @Derelict
                              packetcapture.cap
                              Attached is packet capture file.

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                              • DerelictD
                                Derelict LAYER 8 Netgate
                                last edited by

                                The first problem I see is 192.168.1.115 is asking 192.168.1.1 for DNS and it is not responding.

                                How is DNS configured on the firewall? Services > DNS Resolver or Services > DNS Forwarder needs to be enabled or the clients need to be configured to use something like google or cloudflare for DNS.

                                The second problem I see is that whatever device is d0:50:99:d0:00:ed ( D0:50:99 AsrockIn ASRock Incorporation) keeps asking for an ARP WHO HAS 192.168.1.115 when that is its own IP address. Of course nobody's going to answer, and why is it even asking?

                                I think you can start looking for causes of whatever it is you are seeing off the firewall.

                                Detach whatever switch is connected and connect to one of the LAN ports. Does it work?

                                Chattanooga, Tennessee, USA
                                A comprehensive network diagram is worth 10,000 words and 15 conference calls.
                                DO NOT set a source address/port in a port forward or firewall rule unless you KNOW you need it!
                                Do Not Chat For Help! NO_WAN_EGRESS(TM)

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                                • M
                                  mmajian @Derelict
                                  last edited by

                                  @Derelict Thank you.
                                  The DNS Forwarder is disabled. The DNS resolver is below (I don't think I changed this):
                                  7d852e0b-655d-4ae5-af2d-7841eaecb588-image.png

                                  And yes the device d0:50:99:d0:00:ed is the Win10 computer connect to LAN1. I will try disconnect all ports except LAN1 and see what will happen.

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                                  • M
                                    mmajian @Derelict
                                    last edited by mmajian

                                    @Derelict @stephenw10 @johnpoz
                                    Very good news. I add a static mapping in DHCP server for Win10 computer and check "Create an ARP Table Static Entry for this MAC & IP Address pair.".
                                    70f62d40-fe3c-4b08-a998-dd9f73a754fc-image.png

                                    Now it can ping 192.168.1.1 and solve the immediate problem.
                                    In LAN DHCP server I did check "Enable Static ARP entries"
                                    0249a576-93ca-48e0-a337-62fbf5f1db6c-image.png
                                    Is this means all dynamic DHCP won't have entries in ARP?
                                    Can anyone explain why? Thank you so much.
                                    Jian

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                                    • johnpozJ
                                      johnpoz LAYER 8 Global Moderator
                                      last edited by johnpoz

                                      Oh my freaking gawd... So you had set static arps but had no static arps? So yeah no shit pfsense not going to be able to talk to your clients..

                                      Why do people click on shit when they have no clue to what it does??

                                      How exactly did you get to that where you clicked that??? Without actually hitting the gui at first, and then clicking that would of broken your connection.

                                      Going to have to just stop thinking people didn't randomly start clicking shit without a clue.. And just say install clean do not touch a damn thing - does it work.. There you go!!! Just at a loss to how you did not mention that you clicked that - that sure and and the F is not default!! Why would you click on it - it clearly states what it does!!!

                                      Do we have to explain - only the machines listed below will be able to communicate.. Seems pretty clear to me ;)

                                      An intelligent man is sometimes forced to be drunk to spend time with his fools
                                      If you get confused: Listen to the Music Play
                                      Please don't Chat/PM me for help, unless mod related
                                      SG-4860 24.11 | Lab VMs 2.8, 24.11

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                                      • M
                                        mmajian @johnpoz
                                        last edited by

                                        @johnpoz Yeah I was trying to add some static mappings in DHCP several weeks ago so I checked this. But I didn't know it will dis-communicate normal DHCP client.
                                        In my defense, I understand this as - only the machines listed below will be able to communicate when DHCP server is disabled.
                                        And I would change this label as "Only Static ARP Entries"
                                        Thank you.

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                                        • johnpozJ
                                          johnpoz LAYER 8 Global Moderator
                                          last edited by johnpoz

                                          That is not something you check to do static dhcp reservations...

                                          Dude - thanks for wasting my time.. And every one else in this thread.. Spending cycles trying to figure out what is wrong is you shot yourself in the freaking foot, and didn't even mention it.. I asked you 9 some hours ago even directly about static arp..

                                          If you don't know what something is, and you can not figure it out from reading the book or the docs - than freaking ask before freaking clicking it.. If it was something that should be checked it would of been checked out of the box ;)

                                          Back in your first post - oh by the way I clicked this this and this that are not default.. Do you think they could of have anything to do with it <rolleyes>

                                          An intelligent man is sometimes forced to be drunk to spend time with his fools
                                          If you get confused: Listen to the Music Play
                                          Please don't Chat/PM me for help, unless mod related
                                          SG-4860 24.11 | Lab VMs 2.8, 24.11

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                                          • kiokomanK
                                            kiokoman LAYER 8
                                            last edited by

                                            I like it when I can say... i told you ... 😂

                                            @kiokoman said in Netgate SG-3100 LAN ports cannot go through LAN Gateway.:

                                            reinstall from scratch, who know what experimentation you did in the last two month to end like this

                                            ̿' ̿'\̵͇̿̿\з=(◕_◕)=ε/̵͇̿̿/'̿'̿ ̿
                                            Please do not use chat/PM to ask for help
                                            we must focus on silencing this @guest character. we must make up lies and alter the copyrights !
                                            Don't forget to Upvote with the 👍 button for any post you find to be helpful.

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