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    OPT1 needs LAN DNS access

    Scheduled Pinned Locked Moved General pfSense Questions
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    • L Offline
      lewis @johnpoz
      last edited by

      I can reach the camera just fine from anyone on the LAN.
      That is not what your state table shows..

      That state is showing 192.168.254.10 (on OPT2) trying to reach the camera on 192.168.1.241 (on LAN).

      I can reach it from anything on the LAN side.

      Where is the camera lan, opt1, vlan2? What is the ip range?

      The LAN is 192.168.1.1/24

      Changing to hybrid and creating a specific outbound rule for the >interface your camera is on - doesn't do anything other than just that >traffic

      I've seen posts mentioning using this method before. I tried to avoid it because I wanted to keep things as simple as possible. Guess I have to look into that next then.

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      • johnpozJ Offline
        johnpoz LAYER 8 Global Moderator @lewis
        last edited by johnpoz

        @lewis said in OPT1 needs LAN DNS access:

        That state is showing 192.168.254.10 (on OPT2) trying to reach the camera on 192.168.1.241 (on LAN).

        Well how and the hell is coming into your lan interface???

        edit: DOH! DUH!! that is the 2 states the inbound to opt2 and then outbound on lan - doh!! ;)

        The only reason you would have to do such a outbound nat, is if what your talking to doesn't point to pfsense as its gateway.. OR it has some firewall that doesn't allow things on other networks to talk to it.

        I have seen many a cam not have ability to have things talk to it from other networks. But seems like your doing something odd with some openwrt device?

        If you can not even ping it.. Points to the thing not having a gateway if you ask me.. How exactly do you have this thing configured.. That route info you shows br-wan as the interface? But the .241 is its lan IP? Is the thing doing nat?

        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 Offline
          lewis
          last edited by

          There it is :).
          I logged into a Linux system on the same network and I can ping it from there.
          The second system is the camera itself. I logged into it and checked the gateway. It definitely has a gateway.

          2022-01-18_170205.jpg

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          • johnpozJ Offline
            johnpoz LAYER 8 Global Moderator @lewis
            last edited by johnpoz

            And again what is this br-wan.. lets see the ifconfig from this .241 box..

            Why is this linux box your on have a mask of /16, but this other .241 box has a mask of /16 and 24??

            If its mask is /16 and your on 192.168.x to it your on the same network, and would never send any answer back to pfsense..

            Its config is messed up.. It should not have a /16

            mask.jpg

            No wonder you can not talk to anything on that network from your 192.168.254 network.. Because to them 192.168.anything is local to them and would never send anything back to pfsense.

            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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            • stephenw10S Offline
              stephenw10 Netgate Administrator
              last edited by

              Yup, fix that subnet mask. Looks like the same issue you had initially at the client side, I'd guess for the same reason.

              With either the camera server or the client thinking it's in the same subnet it will not route traffic via it's gateway and hence will be unable to connect.

              Steve

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              • L Offline
                lewis @johnpoz
                last edited by

                Why is this linux box your on have a mask of /16, but this other .241 >box has a mask of /16 and 24??

                Just me needing to reach something on another subnet the other day. but the point is that all devices on the LAN can reach the camera device.

                Its config is messed up.. It should not have a /16

                I'll change it back when I'm done. I had to ssh into a device that was out of the /24 range.

                No wonder you can not talk to anything on that network from your >192.168.254 network.. Because to them 192.168.anything is local to >them and would never send anything back to pfsense.

                I think we're getting out of sync here. The 192.168.1.1 is a /24. The 192.168.254.1 is also a /24. I only have that Linux box on /16 for testing. The windows machine I've been using is on /24 as are all of the devices on the 192.168.254.x.

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                • stephenw10S Offline
                  stephenw10 Netgate Administrator
                  last edited by

                  Right but the camera server also thinks it's in 192.168.0.0/16.

                  That means that when you try to connect to it from the OPT2 subnet the server tries to respond directly, it just ARPs for your client. Obviously your client does not respond because it isn't actually in the same subnet so the server cannot reply.

                  It needs to be in a /24 so that it sees the OPT2 subnet as outside it;s own and replies via it's gateway.

                  Steve

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                  • johnpozJ Offline
                    johnpoz LAYER 8 Global Moderator @lewis
                    last edited by

                    @lewis said in OPT1 needs LAN DNS access:

                    The 192.168.1.1 is a /24

                    Not on the device your trying to talk to - it clearly shows a /16 as a route..

                    noondevice.jpg

                    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 Offline
                      lewis
                      last edited by

                      Wow, this was left over from when the network was a /16.
                      I didn't notice that when I shared the screen.
                      When you pointed it out, I was like 'but I'm not seeing that' until your last comments.

                      Multiple times this has come back to bite me now. Thanks so much for sticking to this considering how tiny the issue was. Sure enough, changing the mask gets it working.

                      Grrr against me for missing that again!

                      johnpozJ 1 Reply Last reply Reply Quote 1
                      • johnpozJ Offline
                        johnpoz LAYER 8 Global Moderator @lewis
                        last edited by

                        @lewis said in OPT1 needs LAN DNS access:

                        this was left over from when the network was a /16.

                        Which should of never ever been a thing in the first place ;)

                        A /16 has no place on an interface anywhere.. It is good for a summary route, its good for a firewall rule, etc. But on an interface - no not really.. In what possible network would you ever possible have 65k devices on the same network ;)

                        If your putting a /8 or a /16 on some interface - your doing it wrong ;) I could see a /22 or even maybe a /21 maybe.. But /16.. no that is just insane.. Even if your like who cares if its too big, it will bite you later when you want to use some other 192.168 network.. Why would anyone use up all of that rfc1918 space on one network?

                        Drives me nuts when I see such masks on users setup, or even worse the /8, just like really?? WTF!!! ;)

                        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 Offline
                          lewis @johnpoz
                          last edited by

                          @johnpoz

                          Drives me nuts when I see such masks on users setup, or
                          even worse the /8, just like really?? WTF!!! ;)

                          Yes, those are very good points.

                          The reason I have 16's here and there is because I have to bring back to life a lot of used hardware. Quite often, I have no way to know what IP the device is using so I set the network to /16 and scan until I find something.

                          Problem is that some of these things get left behind as I get busy moving on to the next problems going down non stop rabbit holes.

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                          • johnpozJ Offline
                            johnpoz LAYER 8 Global Moderator @lewis
                            last edited by

                            @lewis you understand you could do a arpscan without having actually set the /16 on your device ;)

                            https://linux.die.net/man/1/arp-scan

                            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 Offline
                              lewis @johnpoz
                              last edited by

                              @johnpoz No, I didn't know that an arp scan could do the entire /16 range if the machine it's running on is on a /24. Is that what you're saying? I'll have to look up some info.

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                              • johnpozJ Offline
                                johnpoz LAYER 8 Global Moderator @lewis
                                last edited by

                                @lewis yes arpscan can arp for any IPs regardless of what IP or mask is actually set on the interface..

                                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 Offline
                                  lewis @johnpoz
                                  last edited by

                                  @johnpoz Thanks very much. I'll try that right now.

                                  Ack!

                                  arp-scan 192.168.0.0/16

                                  It's very fast but it fails for some reason. I'll look into it.

                                  ERROR: failed to send packet: Resource temporarily unavailable

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                                  • johnpozJ Offline
                                    johnpoz LAYER 8 Global Moderator @lewis
                                    last edited by

                                    @lewis you more than likely have to be root ;) or suid the command.

                                    Here fun stuff you can do with it, here just scanned the 10.0.0/24 space, but some device might not answer that because see how it shows 192.168.2.12 as the IP asking.

                                    Well you can set the source IP to be the same as the IP you asking for, this can get stuff to answer that will only answer if the source IP is on their network, or you can set it to what you want, etc..

                                    arp.jpg

                                    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 Offline
                                      lewis
                                      last edited by lewis

                                      Very cool, thanks for sharing. I'll definitely start using this.
                                      Guess I should try to find more time to play with Kali too as it's got all kinds of such things :).

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                                      • johnpozJ Offline
                                        johnpoz LAYER 8 Global Moderator @lewis
                                        last edited by

                                        @lewis so no more setting /16 on interfaces ;)

                                        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 Offline
                                          lewis @johnpoz
                                          last edited by

                                          @johnpoz LOl, correct :).
                                          Thanks very much for all of your input. Even if I am not able to commit it all to memory, I have these threads to come back to when I'm stuck.

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