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    DNS issue while connected to OpenVPN

    Scheduled Pinned Locked Moved OpenVPN
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    • jimpJ
      jimp Rebel Alliance Developer Netgate
      last edited by

      Services > DNS Resolver, Access Lists tab

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      A 1 Reply Last reply Reply Quote 0
      • noplanN
        noplan
        last edited by

        do you use the netBios setting ?
        out of the blue
        brNP

        A 1 Reply Last reply Reply Quote 0
        • A
          albertmiclat @noplan
          last edited by

          @noplan if you are referring to this? then yes
          0bb43550-5432-4794-b73c-4adb41933907-image.png

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          • A
            albertmiclat @jimp
            last edited by

            @jimp looks like DNS resolver is not enabled, can i still proceed to add the ACL or this must be enable first?
            2b932d0d-b61c-430f-9953-12e0a361fb3a-image.png

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            • jimpJ
              jimp Rebel Alliance Developer Netgate
              last edited by

              Are you using the DNS Forwarder then?

              Or what are the clients using for DNS if not the firewall?

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              • A
                albertmiclat @jimp
                last edited by

                @jimp DNS forwarders also not enabled.

                our clients is using our Windows DNS servers..

                configured on here System > General Setting
                cb552701-a081-4d6e-b5e3-0fb1fe5aeb22-image.png

                and here for OpenVPN
                4bb91fb3-91a8-460c-abee-85ce44a1d883-image.png

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                • jimpJ
                  jimp Rebel Alliance Developer Netgate
                  last edited by

                  OK so the firewall would not be involved in their DNS at all. The "Block outside DNS" box is about all you can do there other than trying to solve client issues.

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                  • A
                    albertmiclat @jimp
                    last edited by

                    @jimp Ok.

                    so for the "Block outside DNS" i need to generated a new Windows client configuration with "Block outside DNS" tick to get this setting in effect?

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                    • jimpJ
                      jimp Rebel Alliance Developer Netgate
                      last edited by

                      You can check the box on the server which may help. If it doesn't, then try exporting a fresh client.

                      If neither one helps then it's something else entirely, most likely not in OpenVPN. Could be on the client or the DNS server, but either way, not pfSense and unlikely to be OpenVPN.

                      Remember: Upvote with the ๐Ÿ‘ button for any user/post you find to be helpful, informative, or deserving of recognition!

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                      • A
                        albertmiclat @jimp
                        last edited by

                        @jimp Thanks jimp.. I will do some testing first. Thanks!

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                        • A
                          albertmiclat
                          last edited by

                          @jimp base on my testing the user still encounter the same problem unable to resolves DNS hostname.

                          my openvpn subnet is 10.50.0.0/22, i noticed when the user is getting 10.50.1.X ip address they encounter the DNS issue.

                          i dont have any clue where to check next, any advice will be greatly appreciated. Thanks

                          GertjanG 1 Reply Last reply Reply Quote 0
                          • GertjanG
                            Gertjan @albertmiclat
                            last edited by

                            @albertmiclat said in DNS issue while connected to OpenVPN:

                            the user is getting 10.50.1.X ip address

                            Ok for the IP, but what about the IP of the DNS the client received ? Why not mentionning it ? The gateway and mask while you're at it.
                            The DNS IP is your DNS server in your/a network ? Can it be accessed by the OpenVPN client ? Is the DNS set up to receive DNS requests from OpenVPN clients ?
                            Note : You're not using pfSense as a DNS for your networks, but some other device. So pfSense OpenVPN server should be set up accordingly. How ? depends on your network ....

                            I guess you should use :

                            8ec8feee-860a-4759-8fa3-3b246ae7084a-image.png

                            where a.b.c.d is your DNS.

                            No "help me" PM's please. Use the forum, the community will thank you.
                            Edit : and where are the logs ??

                            A 1 Reply Last reply Reply Quote 1
                            • A
                              albertmiclat @Gertjan
                              last edited by

                              @Gertjan this setting are set accordingly.
                              07591d2c-a065-4376-8903-9bc0d27473ad-image.png

                              users also getting the right configurations
                              1f004c7c-6f8b-4432-967b-127e72658708-image.png

                              cannot ping both ip and hostname
                              0e52010c-f78a-4252-a487-3963572f94eb-image.png

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                              • A
                                albertmiclat
                                last edited by albertmiclat

                                here's is one of the user who are not having issue can ping both ip and hostname and the ip address is 10.50.0.x
                                37d3b9bf-576b-446c-9848-a779a808aa18-image.png

                                0aa7ad35-8895-4904-bbf2-3068f0887ece-image.png

                                102d47a4-2e25-4e0c-8fb1-be38cb4d7345-image.png

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                                • johnpozJ
                                  johnpoz LAYER 8 Global Moderator
                                  last edited by

                                  what is the local network of these clients that don't work..

                                  So the ipconfig /all for these clients, and the routing table

                                  route print

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                                  If you get confused: Listen to the Music Play
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                                  • A
                                    albertmiclat @johnpoz
                                    last edited by albertmiclat

                                    @johnpoz this user is having DNS issue

                                    fe096ce7-0202-4cb9-baa9-0b2332d9ac8a-image.png

                                    fb4a4ca3-27bc-4d05-8d36-0eab0704fe7c-image.png

                                    032e5a99-7d4c-4521-9de2-8969b6ff2ca3-image.png

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                                    • johnpozJ
                                      johnpoz LAYER 8 Global Moderator
                                      last edited by

                                      Well no overlap with the local network..

                                      When you do a tracert to 10.25.1.38, you see first hop is end of the tunnel?

                                      Can you ping the end of the tunnel? See the gateway listed there in the route print 10.50.1.37

                                      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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                                      • A
                                        albertmiclat @johnpoz
                                        last edited by

                                        @johnpoz this is another user unfortunately the prev is already end his session

                                        • tracert to 10.25.1.38 doesnt show anything
                                        • ping to the gateway also request time out

                                        9a2cfbcc-8fc7-4622-ae89-e80dc0cf0c11-image.png

                                        da48b2af-ad44-428e-b250-b7fdc24c935b-image.png

                                        d973edef-84c2-4ee2-9dc8-c8d393aafe3b-image.png

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                                        • johnpozJ
                                          johnpoz LAYER 8 Global Moderator
                                          last edited by johnpoz

                                          Well if you can not get to the end of the tunnel, its not going to be able to talk to the dns on the other end of the tunnel..

                                          Are the machines that are failing have any 3rd party firewall/security software on them?

                                          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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                                          • A
                                            albertmiclat @johnpoz
                                            last edited by

                                            @johnpoz nope no firewall/security software..

                                            as mentioned previously this happens when the user get this subnet 10.50.1.X but when the user gets 10.50.0.X no issue, this behavior puzzled me more..

                                            may subnet is 10.50.0.0/22

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