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    Routing to wrong interface

    Scheduled Pinned Locked Moved Routing and Multi WAN
    19 Posts 5 Posters 2.7k Views
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    • DerelictD
      Derelict LAYER 8 Netgate
      last edited by

      Are you policy routing on the LANs? Setting gateways on rules there?

      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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      • C
        CyberTiVo
        last edited by

        No

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        • DerelictD
          Derelict LAYER 8 Netgate
          last edited by

          You're right. That doesn't make sense. It looks like you have policy routing enabled.

          Post your LAN rules.

          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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          • chpalmerC
            chpalmer
            last edited by chpalmer

            What is the address of the client on the LAN you are trying to ping from? NM

            I just tried this via the GUI and the only thing I saw was that I saw no packet captures to my interface but only pings through it.

            I have a very similar /30 between two routers.

            Does this happen to you when you use the GUI? Ill try via command line in a bit.

            Triggering snowflakes one by one..
            Intel(R) Core(TM) i5-4590T CPU @ 2.00GHz on an M400 WG box.

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            • C
              CyberTiVo
              last edited by

              Screen Shot 2019-06-23 at 2.47.22 PM.png

              Pinging from 172.18.1.48

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              • C
                CyberTiVo
                last edited by

                pinging fro the GUI works, if I select the source interface or automatic

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                • C
                  CyberTiVo
                  last edited by

                  Once I get this working, I plan to change it to a /31, not really necessary, just want too; does pfSense support /31, I see it as an option?

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                  • C
                    CyberTiVo
                    last edited by

                    I figured it out! Somewhere along the way, things weren't working and I created a gateway for 192.168.10.252. Once I removed it, it started working; it was somewhat related to Multi-WAN; thanks for the help

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                    • chpalmerC
                      chpalmer
                      last edited by chpalmer

                      I cannot reproduce this via command line either.

                      edit-
                      Glad you found it.

                      Triggering snowflakes one by one..
                      Intel(R) Core(TM) i5-4590T CPU @ 2.00GHz on an M400 WG box.

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                      • C
                        CyberTiVo
                        last edited by

                        While it is working now, it got me thinking, there still seems to be a problem with the Multi-WAN routing. I know I am just a user but, seems you should be able to get to your secondary WAN device without having to disable your primary WAN link. There may be an architecture reason this will not work. Using my example above, shouldn't the routing logic know this is a "connected" network and send the packets to the igb3 interface before it decides to send it out the current "WAN"?

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                        • johnpozJ
                          johnpoz LAYER 8 Global Moderator
                          last edited by johnpoz

                          you can get to any network that is connected to pfsense as long as the firewall rules allow it. You can get to any network that is downstream via these networks as long as you setup a gateway and routes.

                          I have no idea what you did with your gateway setup - but you sure do not need to disable your wan to use a secondary path, etc.

                          Keep in mind there is a difference between creating simple routing path via a gateway and routes, and putting a gateway on an interface that makes a "wan" to pfsense which pfsense would by default nat too, etc. And now you would have to take into account your outbound nat settings.

                          Also policy routing comes into play if you set a gateway on a firewall rule, etc. etc.

                          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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                          • C
                            CyberTiVo
                            last edited by

                            Sounds like I need to create a separate rule on the LAN interface to use the specific gateway on igb3 instead of the Gateway group. I tried to add a route to 192.168.10.252 but, of course, pfSense would not let me, since it was connected. I will test when I get home and report back.

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                            • JeGrJ
                              JeGr LAYER 8 Moderator
                              last edited by JeGr

                              @CyberTiVo said in Routing to wrong interface:

                              Once I get this working, I plan to change it to a /31, not really necessary, just want too; does pfSense support /31, I see it as an option?

                              BTW /31 makes no sense to me. /32 is host. /30 is 2 usable addresses. You can't use /31 without some point2point blackmagic in the UI IMHO.

                              Edit: Actually it's selectable. Don't know if your peer supports it though or if it works at all. Was never needed actually ;)

                              Don't forget to upvote 👍 those who kindly offered their time and brainpower to help you!

                              If you're interested, I'm available to discuss details of German-speaking paid support (for companies) if needed.

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                              • DerelictD
                                Derelict LAYER 8 Netgate
                                last edited by

                                Yes, pfSense supports /31.

                                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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                                • johnpozJ
                                  johnpoz LAYER 8 Global Moderator
                                  last edited by

                                  don't really see the point though. Not like your short on ip space to use for your transit networks ;)

                                  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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                                  • DerelictD
                                    Derelict LAYER 8 Netgate
                                    last edited by Derelict

                                    It would make sense in something like a colo or metro-e environment. Or anywhere where RFC1918 is the exception not the rule. Which should be everywhere, actually.

                                    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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