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    DNS resolver doesn`t work with virtual IP

    Scheduled Pinned Locked Moved DHCP and DNS
    18 Posts 8 Posters 3.6k Views
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    • D
      DmnTMN
      last edited by

      About acl 's…
      Ping from every subnet to 8.8.8.8 is success.

      Ping to every default router of every subnet (192.168.1.1 and 10.1.1.2) from both subnets are success.

      About 2 3-rd layer networks in 1 2nd layer.. Switches in this projects are without vlan support. As is... But secondary interface in my..Cisco pactice is not bad idea - it's design.  :P

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      • D
        doktornotor Banned
        last edited by

        1/

        2/ How's Cisco relevant here?!  :o Go to DNS Resolver settings - the last tab!

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        • dotdashD
          dotdash
          last edited by

          Why not point them to 192.168.1.1 for DNS? Or hand out a public DNS server. I don't think the resolver listens on an alias, but haven't tried… Run sockstat -4 and see where the resolver is listening.

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          • johnpozJ
            johnpoz LAYER 8 Global Moderator
            last edited by

            Switches in this projects are without vlan support.

            So your a cheap ass???  Still bad idea no matter how cheap you are running multiple L3 over the same L2..

            WTF does ping have to do with resolver ACL.. So since pictures are worth 1000 words.. See here where my 192.168 is allowed, I can resolve www.pfsense.org.. I then remove that network from the allow list - and REFUSED, but yet I can still ping it so how could it be the ACL????

            resolveracl.png
            resolveracl.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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            • KOMK
              KOM
              last edited by

              So your a cheap ass???

              We don't all control the budgets of the companies we work for.  My entire infrastructure is built on dumb switches because my boss thought smart switches were too expensive for what they did, despite my protests.

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              • johnpozJ
                johnpoz LAYER 8 Global Moderator
                last edited by

                Well explain it too them… If you can not explain why you need a smart switch vs a dumb one.. Maybe you don't need smart ones ;)

                Where did OP state this was company??  Where did he say he asked for smart switches and got denied?

                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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                • dotdashD
                  dotdash
                  last edited by

                  @johnpoz:

                  Where did OP state this was company??  Where did he say he asked for smart switches and got denied?

                  He said the project did not have smart switches. So, you can tell him he's doing it wrong and has to buy new switches, but that's not especially helpful. I agree he's doing it wrong- even though Cisco supports secondary IPs, they do not advocate placing two subnets on the same wire- but he wasn't asking for advice on how to setup the network, but how to fix a specific problem.

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                  • KOMK
                    KOM
                    last edited by

                    Well explain it too them.

                    I see you've never dealt with bosses who suffer from Dunning-Kruger effect.

                    Where did OP state this was company??  Where did he say he asked for smart switches and got denied?

                    I usually find it a safe assumption that when people mention network projects with multiple networks and multiple devices, they're not talking about their homes.  Usually.

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                    • awebsterA
                      awebster
                      last edited by

                      @KOM:

                      Well explain it too them.

                      I see you've never dealt with bosses who suffer from Dunning-Kruger effect.

                      Thanks KOM, I have learned something new and unexpected today.

                      –A.

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                      • KOMK
                        KOM
                        last edited by

                        Once you find out about D-K, the behaviour of a LOT of people starts to make a whole lot more sense.

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                        • johnpozJ
                          johnpoz LAYER 8 Global Moderator
                          last edited by

                          Great read thanks for the link, D-K I had never heard of that before - but makes a lot of sense ;)  This quote is spot on!!

                          "The skills you need to produce a right answer are exactly the skills you need to recognize what a right answer is."

                          "but he wasn't asking for advice on how to setup the network, but how to fix a specific problem."

                          But this is right in line with D-K if you ask me.. Running multiple L3 over the same L2 is wrong approach to whatever actual problem is.. That would never be correct solution no matter the problem..  So helping him do the WRONG thing is not freaking helping him that is for sure..

                          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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                          • KOMK
                            KOM
                            last edited by

                            The PHB from Dilbert is another prime example of DKE.

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                            • M
                              mohsh86
                              last edited by

                              Anyone still looking at this, this is solved by ticking "DNS Rebind Check" in "System -> Advanaced" Settings

                              M 1 Reply Last reply Reply Quote 1
                              • M
                                matthewmalk248 @mohsh86
                                last edited by

                                @mohsh86 i registered an account just to say thank you for this!

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