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    DHCP Scope and DNS Reverse Lookup

    Scheduled Pinned Locked Moved IT Discussion
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    • gjacobseG
      gjacobse @scottalanmiller
      last edited by

      @scottalanmiller said in DHCP Scope and DNS Reverse Lookup:

      @gjacobse said in DHCP Scope and DNS Reverse Lookup:

      @stacksofplates said in DHCP Scope and DNS Reverse Lookup:

      @gjacobse said in DHCP Scope and DNS Reverse Lookup:

      @scottalanmiller said in DHCP Scope and DNS Reverse Lookup:

      @gjacobse said in DHCP Scope and DNS Reverse Lookup:

      It is available externally just fine. it is internal that I am having the issue.

      Then why are we looking at the public DNS records? You either need to assign an overloaded one internally or a different one internally. The internal users cannot be using the public DNS records.

      DNS Manager
      Forward Lookup Zone - domain.com A Record(s)

      demo ( points to external IP)
      RDS (points to internal IP)
      RDS3 (points to Internal IP)
      nextcloud (points to Internal IP)

      What DNS manager? Internal or external?

      Instead of looking at reverse, what do you get from an nslookup on nextcloud.domain.com?

      DNS Manager : Server 2012

      OH! You should have said that, we've been assuming the main DNS system. Argh.

      So internal doesn't work even though it points to the right address?

      Guess I made some assumptions when I mentioned DHCP Scope and DNS, and refererenced IPs in the local 192.168.2 zone

      1 Reply Last reply Reply Quote 0
      • gjacobseG
        gjacobse @scottalanmiller
        last edited by

        @scottalanmiller said in DHCP Scope and DNS Reverse Lookup:

        @gjacobse said in DHCP Scope and DNS Reverse Lookup:

        However the NextCloud instance is on a 168.3.x zone. Going back to DHCP, the single scope is 168.1.1 - 168.3.254.

        • force NextCloud to a 168.2.x address.

        What do you mean force it to 168.2.x? That is a 168.3.x address here. See your subnet notes above.

        NextCloud currently has a 192.168.3.x address. Force as in push it to a 192.168.2.x address

        scottalanmillerS 1 Reply Last reply Reply Quote 0
        • scottalanmillerS
          scottalanmiller
          last edited by

          I am so lost.

          stacksofplatesS 1 Reply Last reply Reply Quote 0
          • stacksofplatesS
            stacksofplates @scottalanmiller
            last edited by

            @scottalanmiller said in DHCP Scope and DNS Reverse Lookup:

            I am so lost.

            Ya idk what's going on. I'd do an nslookup first to figure out what the clients are tying to get to.

            1 Reply Last reply Reply Quote 0
            • scottalanmillerS
              scottalanmiller @gjacobse
              last edited by

              @gjacobse said in DHCP Scope and DNS Reverse Lookup:

              @scottalanmiller said in DHCP Scope and DNS Reverse Lookup:

              @gjacobse said in DHCP Scope and DNS Reverse Lookup:

              However the NextCloud instance is on a 168.3.x zone. Going back to DHCP, the single scope is 168.1.1 - 168.3.254.

              • force NextCloud to a 168.2.x address.

              What do you mean force it to 168.2.x? That is a 168.3.x address here. See your subnet notes above.

              NextCloud currently has a 192.168.3.x address. Force as in push it to a 192.168.2.x address

              Whoa, that's nothing like what you had before. 168.x is external public IPs. 192.168.x is internal, private IPs.

              Why are there two subnets as options?

              stacksofplatesS 1 Reply Last reply Reply Quote 2
              • stacksofplatesS
                stacksofplates @scottalanmiller
                last edited by stacksofplates

                @scottalanmiller said in DHCP Scope and DNS Reverse Lookup:

                @gjacobse said in DHCP Scope and DNS Reverse Lookup:

                @scottalanmiller said in DHCP Scope and DNS Reverse Lookup:

                @gjacobse said in DHCP Scope and DNS Reverse Lookup:

                However the NextCloud instance is on a 168.3.x zone. Going back to DHCP, the single scope is 168.1.1 - 168.3.254.

                • force NextCloud to a 168.2.x address.

                What do you mean force it to 168.2.x? That is a 168.3.x address here. See your subnet notes above.

                NextCloud currently has a 192.168.3.x address. Force as in push it to a 192.168.2.x address

                Whoa, that's nothing like what you had before. 168.x is external public IPs. 192.168.x is internal, private IPs.

                Why are there two subnets as options?

                This is why I was confused. Looks like he left off the 192 to shorten it? I thought it was public also.

                Ah it's in the reverse ip. I just missed it.

                1 Reply Last reply Reply Quote 1
                • scottalanmillerS
                  scottalanmiller
                  last edited by

                  This thread is a lost cause. @gjacobse start a new thread. Post your GOAL and your PROBLEM. This thread is all about DHCP Scope and Reverse DNS which are both completely unrelated to the issue you are trying to solve. Everyone is lost because you led off with a thread about red herrings and not about the problem you are attempting to resolve. Start over from the beginning, but don't inject potential solutions or presumptions. Just state the state of things and what you need to have working at the end. Don't use terms like "DNS Server" without telling us internal or external. Don't modify addresses. Keep it simple and focused on the goal.

                  1 Reply Last reply Reply Quote 0
                  • gjacobseG
                    gjacobse
                    last edited by

                    Never Mind.

                    Found the issue, and added the A Record accordingly - points like it should.

                    scottalanmillerS 1 Reply Last reply Reply Quote 0
                    • scottalanmillerS
                      scottalanmiller @gjacobse
                      last edited by

                      @gjacobse said in DHCP Scope and DNS Reverse Lookup:

                      Never Mind.

                      Found the issue, and added the A Record accordingly - points like it should.

                      There was no record at all?

                      gjacobseG JaredBuschJ 2 Replies Last reply Reply Quote 0
                      • gjacobseG
                        gjacobse @scottalanmiller
                        last edited by

                        @scottalanmiller said in DHCP Scope and DNS Reverse Lookup:

                        @gjacobse said in DHCP Scope and DNS Reverse Lookup:

                        Never Mind.

                        Found the issue, and added the A Record accordingly - points like it should.

                        There was no record at all?

                        I had added the record. But didn't work. searched for record, not there.
                        Was in wrong zone.

                        JaredBuschJ 1 Reply Last reply Reply Quote 0
                        • JaredBuschJ
                          JaredBusch @scottalanmiller
                          last edited by

                          @scottalanmiller said in DHCP Scope and DNS Reverse Lookup:

                          @gjacobse said in DHCP Scope and DNS Reverse Lookup:

                          Never Mind.

                          Found the issue, and added the A Record accordingly - points like it should.

                          There was no record at all?

                          Obviously. This was the entire problem the entire time.

                          He did not even perform a basic DNS validation locally (nslookup) before jumping to random conclusions on the wrong things.

                          1 Reply Last reply Reply Quote 1
                          • JaredBuschJ
                            JaredBusch @gjacobse
                            last edited by

                            @gjacobse said in DHCP Scope and DNS Reverse Lookup:

                            @scottalanmiller said in DHCP Scope and DNS Reverse Lookup:

                            @gjacobse said in DHCP Scope and DNS Reverse Lookup:

                            Never Mind.

                            Found the issue, and added the A Record accordingly - points like it should.

                            There was no record at all?

                            I had added the record. But didn't work. searched for record, not there.
                            Was in wrong zone.

                            That is 100% no record at all.

                            1 Reply Last reply Reply Quote 0
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