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    Unable to access a host on another subnet but can from pfSense [SOLVED]

    Scheduled Pinned Locked Moved Routing and Multi WAN
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    • DerelictD
      Derelict LAYER 8 Netgate
      last edited by

      That will normally only show blocks. If you want to examine active connections you probably want Diagnostics > States.

      Or to troubleshoot state establishment, Diagnostics > Packet Capture.

      It could also be that the "AP" does not, itself, have a default gateway set.

      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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      • K
        kejianshi
        last edited by

        Those can have a setting called "AP Isolation" or something basically acts like a firewall.  Find it if its there and turn it off.

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        • L
          lavito
          last edited by

          @Derelict
          Thank you - What I found in there is this:

          192.168.1.2:64267 (192.168.0.3:64267) -> 192.168.1.2:80 SYN_SENT:CLOSED 3 / 0 152 B / 0 B

          I am still searching now to see what this means.

          @kejianshi
          I have specifically switched of the Firewall and NAT and the gateway inside the AP is set to 192.168.1.2.

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          • K
            kejianshi
            last edited by

            What kind of AP are you using?

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            • L
              lavito
              last edited by

              It's BrightBox2.

              Fortunately, this router has a specific option to switch off NAT & Firewall. (which may not work  :-)
              I also switched off its DHCP, as I am using the one in pfSence for the LAN 2 interface.

              The option to set the AP gateway is in its DHCP section, as I think on most routers.

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              • L
                lavito
                last edited by

                A very good spot both thank you!!

                I added another Web sever, this time a PC, and the request went trough with no issues from LAN1 to LAN2.
                So the AP is somehow being "clever", despite its firewall being "switched-off".

                So, is there a way for me to access my AP, as there is no other setting I see which can solve this.
                E.g.  rewrite the source IP  or some other special pfSence function?

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                • K
                  kejianshi
                  last edited by

                  I've never been able to get around one that was doing that.

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                  • L
                    lavito
                    last edited by

                    OK, cheers and thank you for your help.

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                    • DerelictD
                      Derelict LAYER 8 Netgate
                      last edited by

                      Yes. Outbound NAT on the pfSense interface that the AP is connected to.

                      Connections to the AP will appear to the AP as coming from the pfSense interface not the remote subnet.

                      I'd prefer to just use a "real" AP but that's probably just me.

                      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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                      • K
                        kejianshi
                        last edited by

                        I've had hit and miss results with DD-WRT in exactly this same situation.

                        My last version blocked everything but my current version works fine.  As you said, a real AP designed to be just an AP would be be$t.

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                        • L
                          lavito
                          last edited by

                          @Derelict:

                          Yes. Outbound NAT on the pfSense interface that the AP is connected to.

                          Connections to the AP will appear to the AP as coming from the pfSense interface not the remote subnet.

                          I'd prefer to just use a "real" AP but that's probably just me.

                          I just noticed your response Derelict. Great!!!

                          I tried it and of course it did not work  :-[, so I just need a bit of help with setting up the NAT OUTBOUND to achieve => [i]"AP will appear to the AP as coming from the pfSense interface not the remote subnet"

                          Issue: I am trying to access AP on 192.168.1.2:80 from 192.168.0.3.

                          Setup:

                          • Outbound NAT -> Hybrid

                          • Outbound NAT Interface: LAN2

                          • Outbound NAT Source: Network: 192.168.0.3/24 Port:80

                          • Outbound NAT Destination: Network: 192.168.1.2/31 Port:80

                          • Translation\Other subnet: 192.168.1.2/31

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                          • DerelictD
                            Derelict LAYER 8 Netgate
                            last edited by

                            Don't set a source port.

                            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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                            • L
                              lavito
                              last edited by

                              No joy, I am uploading details in case:

                              NAT.png_thumb
                              NAT.png

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                              • DerelictD
                                Derelict LAYER 8 Netgate
                                last edited by

                                Look at your source network. You need slimmer fingers.

                                And the NAT address should be the LAN2 interface address, not some /28 ffs.

                                How many APs are you trying to do this for? If one use a /32 destination address and LAN2 address as the NAT address.

                                That /29 source will only NAT if you are connecting from those specific hosts. Why are you using all these wacky netmasks?

                                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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                                • L
                                  lavito
                                  last edited by

                                  It worked!!! Thank you very much!

                                  As a note, I also had to make the port static for this to work.
                                  The key point I was missing is that the "Translation\Other subnet" has to be the address of the destination interface.

                                  The weird subnets was just desperation, to make things work.  ;D

                                  NAT.png
                                  NAT.png_thumb

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                                  • johnpozJ
                                    johnpoz LAYER 8 Global Moderator
                                    last edited by

                                    "I also had to make the port static for this to work."

                                    No you didn't..  Why would where your forwarding 80 care that the source port of the traffic was the same as what the client used vs letting pfsense do Napt..

                                    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

                                      Static port has nothing to do with it. That will possibly create problems for you down the road but leave it if you so desire.

                                      Your NAT port should be 80, not any.

                                      Glad it's working for you.

                                      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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                                      • L
                                        lavito
                                        last edited by

                                        @Derelict:

                                        Static port has nothing to do with it. That will possibly create problems for you down the road but leave it if you so desire.

                                        Your NAT port should be 80, not any.

                                        Hmmmm,  :-,  If I tick "Static", pfSence sets the NAT port to Any. However if I set NAT port to 80, then I cannot connect to 192.168.1.2:80 from 192.168.0.3 - I tried again.

                                        Obviously you both know what you are talking about, why would this be?

                                        @johnpoz:

                                        "No you didn't..  Why would where your forwarding 80 care that the source port of the traffic was the same as what the client used vs letting pfsense do Napt..

                                        As above, also I am not clear what you are saying, can you rephrase?

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                                        • johnpozJ
                                          johnpoz LAYER 8 Global Moderator
                                          last edited by

                                          When a browser, or any application for that matter connects to pretty much any other application.. It is really rare that the source port needs to be something specific.. Some cases sure.. But very far and between.. http or port 80 have never seen such a case where the source port would have to be something specific.

                                          When you set a static port on an outbound port forward what your saying is that pfsense can not change what the source port to something else.. So if your connection was from ipA:portX to ipB:80, then pfsense can not change that to ipA:portY to ipB:80..  Which is how Napt works.

                                          Your pfsense lan2 IP is in your 192.168.1.1 right?  And your just trying to do a source nat to the web gui running on 80, because the device your connecting to on 80 does not have a gateway set..

                                          Would look like below.  I just used my lan to show this like I was coming from a different network the 192.168.0.3 in your example.. And 192.168.1.2 is say on my lan..

                                          sourcenat.png
                                          sourcenat.png_thumb

                                          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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                                          • L
                                            lavito
                                            last edited by

                                            @johnpoz:

                                            Your pfsense lan2 IP is in your 192.168.1.1 right?  And your just trying to do a source nat to the web gui running on 80, because the device your connecting to on 80 does not have a gateway set..

                                            Exactly!!! This is a WiFi router working as AP only. I am trying to access its Web Config pages.

                                            @johnpoz:

                                            Would look like below.

                                            I totally get what you are saying. Also, I did change the NAT port to 80 (non static), as you suggested,  so it can change  "ipA:portx" to " ipA:portY", however when I do this, I just cannot get trough to the AP's web interface.

                                            I just cannot see how would the AP detect this and why your suggestion does not work.

                                            When I change the NAT port to 80, I get following in the state log:

                                            LAN1 tcp 192.168.0.3:52387 -> 192.168.1.2:80 CLOSED:SYN_SENT
                                            LAN2 tcp 192.168.0.3:52387 -> 192.168.1.2:80 SYN_SENT:CLOSED

                                            When it is static I get below - Although I see the source port also changing, strange :

                                            LAN1 tcp 192.168.0.3:52469 -> 192.168.1.2:80 ESTABLISHED:ESTABLISHED
                                            LAN2 tcp 192.168.1.1:52469 (192.168.0.3:52469) -> 192.168.1.2:80 ESTABLISHED:ESTABLISHED

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