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    Add PTR and NS Records to DNS Resolver possible?

    Scheduled Pinned Locked Moved DHCP and DNS
    99 Posts 14 Posters 31.5k Views
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    • D
      doktornotor Banned
      last edited by

      
      local-data: "b._dns-sd._udp IN PTR pc-printer-discovery"
      local-data: "lb._dns-sd._udp IN PTR pc-printer-discovery"
      local-data: "_ipps._tcp IN PTR pc-printer-discovery"
      
      

      Dafuq?!

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      • johnpozJ
        johnpoz LAYER 8 Global Moderator
        last edited by

        Exactly!!!

        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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        • D
          doktornotor Banned
          last edited by

          @OP: Here's some valid example of PTR:

          
          local-data-ptr: "192.0.2.1 foo.example.com"
          local-data-ptr: "2001:db8:a:b:c::1 foo.example.com"
          
          
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          • johnpozJ
            johnpoz LAYER 8 Global Moderator
            last edited by

            Nope they want PTR setup for b._dns-sd._udp

            I have downloaded the damn product they have a 40 day trial… I have to go out for my morning walk.. And then work.. But will try and get it setup today so I can screen shot exactly how to get it working with the domain your using as your search domain.. And that their papercut ng interface shows it all green, etc.  And you can print from some mobile client..

            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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            • D
              doktornotor Banned
              last edited by

              AFAICT this shit wants/needs mDNS/Zeroconf and messing with Unbound will do zero useful work there. Perhaps look at Avahi instead.

              Junk.

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              • K
                kolpinkb
                last edited by

                You can do either DNS records or mDNS.  I tried the mDNS discovery option in PaperCut NG Mobility print and my printer does show up in their Android app but I can an internal server error.  Also, I found the avahi daemon to crash intermittently with default settings.

                Would much prefer to get the DNS PTR records working.

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                • T
                  trentuk
                  last edited by

                  Thanks for offering to have a look at this johnpoz, very much appreciated!

                  This site is using split DNS, by this I mean they're using the same domain internally as externally, thus you're probably correct that something is missing from the DNS config in pfSense and the Mobility Print client is then looking at the public DNS to find it and then receives NX.

                  I've asked the IT Director if I can post the domain name here but they would prefer not to, therefore could we use 'yourdomain.ltd' whilst discussing the configuration?

                  pfSense version: 2.3.4-RELEASE-p1

                  System - General Setup - Domain: yourdomain.ltd

                  DNS Resolver - System Domain Local Zone Type: Transparent

                  Client DNS Suffix is: yourdomain.ltd

                  Given the above information, would you suggest something along the following lines in DNS Resolver - Custom Options:

                  b._dns-sd._udp.yourdomain.ltd. IN PTR pc-printer-discovery.yourdomain.ltd.
                  lb._dns-sd._udp.yourdomain.ltd. IN PTR pc-printer-discovery.yourdomain.ltd.
                  pc-printer-discovery.yourdomain.ltd. IN NS print-server-host.yourdomain.ltd.
                  print-server-host.yourdomain.ltd. IN A XXX.XXX.XXX.XXX

                  Many thanks in advance …

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                  • DerelictD
                    Derelict LAYER 8 Netgate
                    last edited by

                    I think OP really wants to configure SRV records for that, not PTR records.

                    I would say the confusion knob is turned up to 11.

                    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

                      I have downloaded the software, and yeah something is not right that is for sure with their instructions.

                      Sorry to say I will most likely not get back this for a few days.. I got new internet at home 500/50 and it consuming my interest ;)

                      What I noticed was didn't even see the client doing a dns query for the PTR.. I think the current mdns that was on the segment was confusing it, etc.  I will have to turn off the mdns on the printer, etc.  And need to run the mobility client on different machine than the papercut ng, 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

                      1 Reply Last reply Reply Quote 0
                      • T
                        trentuk
                        last edited by

                        Hello Derelict,

                        @Derelict:

                        I think OP really wants to configure SRV records for that, not PTR records.

                        I would say the confusion knob is turned up to 11.

                        The software vendor specify a requirement for the following records:

                        ;–-------------- Mobility Print records --------------

                        b._dns-sd._udp      IN PTR pc-printer-discovery
                        lb._dns-sd._udp      IN PTR pc-printer-discovery
                        pc-printer-discovery IN NS  print-server-host
                        print-server-host    IN A  XXX.XXX.XXX.XXX

                        ;--------------- End of Mobility Print records ---------

                        https://www.papercut.com/products/ng/mobility-print/manual/how-to-setup/step-2-configuration/discover-your-printers-using-dns/

                        Which is possibly the cause of the confusion knob being turned past its recommended level  ;)

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                        • T
                          trentuk
                          last edited by

                          Hello johnpoz,

                          No problem, glad I'm not the only one struggling with this  ???

                          Enjoy the new connection, hopefully see you back here once you've downloaded the entire internet at blisteringly fast speeds ;)

                          1 Reply Last reply Reply Quote 0
                          • K
                            kolpinkb
                            last edited by

                            Thanks again johnpoz,

                            This configuration has many of us perplexed.

                            Have fun with the new 500/50 connection.  I'm sure the increased upload is the best part.

                            1 Reply Last reply Reply Quote 0
                            • DerelictD
                              Derelict LAYER 8 Netgate
                              last edited by

                              The software vendor specify a requirement for the following records:

                              ;–-------------- Mobility Print records --------------

                              b._dns-sd._udp      IN PTR pc-printer-discovery
                              lb._dns-sd._udp      IN PTR pc-printer-discovery
                              pc-printer-discovery IN NS  print-server-host
                              print-server-host    IN A  XXX.XXX.XXX.XXX

                              ;--------------- End of Mobility Print records ---------

                              The software vendor's confusion knob is turned up to at least 12. That makes no sense at all. PTR records do not have names on both sides. They are used to lookup a name when all you have is an address, like 198.51.100.101.

                              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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                              • luckman212L
                                luckman212 LAYER 8
                                last edited by

                                They look like SRV records…. at least the left-hand side.... maybe you can "sniff" the correct format from a working setup using some form of dns-sd -Z

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                                • K
                                  kolpinkb
                                  last edited by

                                  I think the software is looking to be a delegation server for a specific subdomain.

                                  Base domain: example.com
                                  Delegation server: mobility-print-host.example.com
                                  subdomains to delegate: xxxxprinter.b._dns-sd._udp.pc-printer-discovery.

                                  ???

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                                  • DerelictD
                                    Derelict LAYER 8 Netgate
                                    last edited by

                                    Unless the LHS of those PTR records is supposed to be replaced with at least part of an IP address, to be completed with .in-addr.arpa., they are nonsense.

                                    Or we're going to need a lot more information about what it is they are trying to do.

                                    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)

                                    1 Reply Last reply Reply Quote 0
                                    • K
                                      kolpinkb
                                      last edited by

                                      The configuration example on their website (that we've all shared here) is specifically for BIND.  Not sure if it translates 1:1 for Unbound.

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                                      • DerelictD
                                        Derelict LAYER 8 Netgate
                                        last edited by

                                        DNS is DNS is DNS. I have not looked at the document 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)

                                        1 Reply Last reply Reply Quote 0
                                        • K
                                          kolpinkb
                                          last edited by

                                          I get that.  But something with the way PTR records are handled internally in the software (BIND vs Unbound) must be different.

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                                          • D
                                            doktornotor Banned
                                            last edited by

                                            No it doesn't translate 1:1 for Unbound, plus, instead of copy-paste of nonsensical instructions they are providing, it'd be way more useful to explain what they are trying to implement. Is that shitty product trying to delegate some subdomain to their own nameserver/printserver, or what?

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