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    DNS not working over VPN

    Scheduled Pinned Locked Moved DHCP and DNS
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    • C
      ciphergeek @whoeveriam
      last edited by

      @whoeveriam

      I'm seeing the same thing on my Mac. I've got an IPSEC vpn that is providing a DNS server list but the DNS server is being added as secondary to the hosts configured DNS server. Any updates?

      W 1 Reply Last reply Reply Quote 0
      • W
        whoeveriam @ciphergeek
        last edited by

        @ciphergeek Unfortunately I've had no further luck. I wonder if this isn't a Mac OS bug in the way it handles DNS lookups for VPN connections. I haven't had time to run this down any further. If you find something please post here as well.

        Cheers!

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        • A
          andrelung
          last edited by

          Same thing is happening to me. Any clues or workarounds how to deal with that? Currently I am handing out IPs...

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          • C
            ciphergeek
            last edited by

            I had to roll out this script to users. I haven't tested against Big Sur yet though to see if this is fixed. I guess we should submit to apple at some point.

            tell application "Terminal"
            try
            do shell script "mkdir /etc/resolver" with administrator privileges
            do shell script "touch /etc/resolver/secure" with administrator privileges
            do shell script "echo nameserver 10.10.10.15 >> /etc/resolver/secure" with administrator privileges
            say "Should be working now!!"
            on error
            say "uh oh, we have a problem"
            end try
            end tell

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            • A
              andrelung @ciphergeek
              last edited by

              @ciphergeek Thanks for your answer! I manually added the file and in fact it instantly starts showing up:

              $ scutil --dns
              
              [...]
              resolver #8
                domain   : secure
                nameserver[0] : 192.168.88.1
                flags    : Request A records, Request AAAA records
                reach    : 0x00000003 (Reachable,Transient Connection)
              

              However, the name is still not resolvable without specifically requesting the nameserver:
              etc-resolver-secure_.png

              Let me know if you see anything odd here. Otherwise I'll keep trying to figure this out...

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              • C
                ciphergeek
                last edited by

                Hi. In my case, .secure is an internal domain name I created. Are you trying to get general DNS working or an internal DNS zone?

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                • A
                  andrelung @ciphergeek
                  last edited by

                  Right, just the internal name resolution is problematic! I mv'ed the "secure"-file to our own internal domain name. Same results.

                  General DNS is provided by the "host"-connection, which is fine I guess?

                  $ nslookup google.com
                  Server:		172.20.10.1
                  Address:	172.20.10.1#53
                  
                  Non-authoritative answer:
                  Name:	google.com
                  Address: 216.58.206.14
                  
                  $ nslookup google.com 192.168.88.1
                  Server:		192.168.88.1
                  Address:	192.168.88.1#53
                  
                  Non-authoritative answer:
                  Name:	google.com
                  Address: 142.250.185.142
                  
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                  • C
                    ciphergeek
                    last edited by

                    What's running "scuitl --dns" show

                    A 1 Reply Last reply Reply Quote 0
                    • A
                      andrelung @ciphergeek
                      last edited by

                      $ scutil --dns
                      DNS configuration
                      
                      resolver #1
                        nameserver[0] : fe80::c82:13eb:d00f:5f5d%en0
                        nameserver[1] : 172.20.10.1
                        if_index : 6 (en0)
                        flags    : Request A records, Request AAAA records
                        reach    : 0x00020002 (Reachable,Directly Reachable Address)
                      
                      resolver #2
                        domain   : local
                        options  : mdns
                        timeout  : 5
                        flags    : Request A records, Request AAAA records
                        reach    : 0x00000000 (Not Reachable)
                        order    : 300000
                      
                      resolver #3
                        domain   : 254.169.in-addr.arpa
                        options  : mdns
                        timeout  : 5
                        flags    : Request A records, Request AAAA records
                        reach    : 0x00000000 (Not Reachable)
                        order    : 300200
                      
                      resolver #4
                        domain   : 8.e.f.ip6.arpa
                        options  : mdns
                        timeout  : 5
                        flags    : Request A records, Request AAAA records
                        reach    : 0x00000000 (Not Reachable)
                        order    : 300400
                      
                      resolver #5
                        domain   : 9.e.f.ip6.arpa
                        options  : mdns
                        timeout  : 5
                        flags    : Request A records, Request AAAA records
                        reach    : 0x00000000 (Not Reachable)
                        order    : 300600
                      
                      resolver #6
                        domain   : a.e.f.ip6.arpa
                        options  : mdns
                        timeout  : 5
                        flags    : Request A records, Request AAAA records
                        reach    : 0x00000000 (Not Reachable)
                        order    : 300800
                      
                      resolver #7
                        domain   : b.e.f.ip6.arpa
                        options  : mdns
                        timeout  : 5
                        flags    : Request A records, Request AAAA records
                        reach    : 0x00000000 (Not Reachable)
                        order    : 301000
                      
                      resolver #8
                        domain   : mydomain
                        nameserver[0] : 192.168.88.1
                        flags    : Request A records, Request AAAA records
                        reach    : 0x00000002 (Reachable)
                      
                      DNS configuration (for scoped queries)
                      
                      resolver #1
                        nameserver[0] : fe80::c82:13eb:d00f:5f5d%en0
                        nameserver[1] : 172.20.10.1
                        if_index : 6 (en0)
                        flags    : Scoped, Request A records, Request AAAA records
                        reach    : 0x00020002 (Reachable,Directly Reachable Address)
                      
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                      • C
                        ciphergeek
                        last edited by

                        Sorry man. That's weird. No idea why that isn't working that looks right if your internal dns is 172.20.10.1

                        A 1 Reply Last reply Reply Quote 0
                        • A
                          andrelung @ciphergeek
                          last edited by

                          Actually I am testing the VPN through an iPhone hotspot and that's the DNS/Gateway of the iPhone connection.

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