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    Vlans will not DNS resolve

    Scheduled Pinned Locked Moved DHCP and DNS
    15 Posts 3 Posters 642 Views
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    • johnpozJ
      johnpoz LAYER 8 Global Moderator @sentein
      last edited by johnpoz

      @sentein that server is pointing to itself for dns 127.0.0.1, where is it actually trying to go?

      Do a directed query.. with nslookup change using server to like 8.8.8.8 then try your query

      $ nslookup                                   
      Default Server:  sg4860.home.arpa            
      Address:  192.168.9.253                      
                                                   
      > server 8.8.8.8                             
      Default Server:  dns.google                  
      Address:  8.8.8.8                            
                                                   
      > www.google.com                             
      Server:  dns.google                          
      Address:  8.8.8.8                            
                                                   
      Non-authoritative answer:                    
      Name:    www.google.com                      
      Addresses:  2607:f8b0:4009:81a::2004         
                142.250.190.132                    
                                                   
      

      Does that work? Ok set it your pfsense IP.. I take it that is that 10.10.4.4 address?

      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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      • S
        sentein
        last edited by

        @johnpoz sorry for the delay. the wife wanted to go out to eat. Thank you for the help with this. I ran the test you mentioned. When specifying the server the nslookup actually worked.

        de22ae20-4c64-459e-a847-873d78f82d25-image.png

        I am figuring this means my actual problem is in the server itself. Please correct me if i am incorrect. If thats the case i guess i need to go root around in the setting for the server.

        johnpozJ 1 Reply Last reply Reply Quote 0
        • johnpozJ
          johnpoz LAYER 8 Global Moderator @sentein
          last edited by johnpoz

          @sentein so yeah linux will point to itself like that, and then forward elsewhere - but where it actually forwards to you have no idea where, which isn't working what flavor of linux are you running? prob using netplan would be my guess. Not really a fan..

          For example this version of ubuntu is doing it.

          user@UC:~$ nslookup
          > www.google.com
          Server:         127.0.0.53
          Address:        127.0.0.53#53
          
          Non-authoritative answer:
          Name:   www.google.com
          Address: 172.217.0.164
          >
          

          prob want to make sure its listening on 53..

          user@UC:~$ netstat -anl | grep :53
          tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN     
          udp        0      0 127.0.0.53:53           0.0.0.0:*                       
          

          And you can see where its pointing

          user@UC:~$ resolvectl status
          Global
                 Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
          resolv.conf mode: stub
          
          Link 2 (ens3)
              Current Scopes: DNS
                   Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
          Current DNS Server: 192.168.3.10
                 DNS Servers: 192.168.3.10
                  DNS Domain: home.arpa
          user@UC:~$ 
          

          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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          • S
            sentein
            last edited by

            @johnpoz Right now this server is running linux mint 21.3 edge. I tried ubuntu headless but i could not wrap my head around netplan. ubuntu wanted to route everything through the 10Gbe because it was faster. That was not working because the 10Gbe interface was and still is completely isolated. I did try to figure out what is going on with the DNS on the server. Below is the command and the output. It seems that my DNS settings are being forwaded to the server. I am a bit lost as to what it is doing. If you are sure that my problem is in the OS i can go bother someone else. At that point it is not a pfsense problem.

            nmcli dev show |grep DNS
            IP4.DNS[1]: 0.0.0.0
            IP4.DNS[2]: 9.9.9.9
            IP4.DNS[3]: 149.112.112.112
            IP4.DNS[4]: 84.200.70.40
            IP4.DNS[5]: 84.200.69.80

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            • S
              sentein
              last edited by

              The ---> DNS Domain: #####.net below is me sanitizing my address.

              Global
              Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
              resolv.conf mode: stub
              Current DNS Server: 10.10.5.4
              DNS Servers: 10.10.5.4
              Fallback DNS Servers: 9.9.9.9

              Link 2 (ens1f0)
              Current Scopes: none
              Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
              DNS Domain: #####.net

              Link 3 (ens1f1)
              Current Scopes: none
              Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported

              Link 4 (ens5)
              Current Scopes: none
              Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported

              Link 5 (ens5d1)
              Current Scopes: none
              Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported

              Link 6 (docker0)
              Current Scopes: none
              Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported

              Link 28 (veth118db9f)
              Current Scopes: none
              Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported

              Link 30 (veth2dd1412)
              Current Scopes: none
              Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported

              johnpozJ 1 Reply Last reply Reply Quote 0
              • johnpozJ
                johnpoz LAYER 8 Global Moderator @sentein
                last edited by

                @sentein said in Vlans will not DNS resolve:

                DNS Servers: 10.10.5.4

                And what IP is that, you should be pointing to pfsense lan IP..

                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

                S 1 Reply Last reply Reply Quote 0
                • S
                  sentein @johnpoz
                  last edited by

                  @johnpoz that is the DHCP server for the vlan in question. 10.10.4.4 is the LAN DHCP server. So i should requires it to point to the LAN PFsense IP? Maybe thats most of my issue.

                  johnpozJ 1 Reply Last reply Reply Quote 0
                  • johnpozJ
                    johnpoz LAYER 8 Global Moderator @sentein
                    last edited by

                    @sentein does this dhcp server provide dns?

                    Doesn't seem to - do a directed query to it..

                    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

                    S 2 Replies Last reply Reply Quote 0
                    • S
                      sentein @johnpoz
                      last edited by

                      @johnpoz I thought it was supposed to. Maybe i have something wrong.... I have a second PC for the PFsense box. Should i just start over?

                      c77d3976-bccc-4450-96b4-94e6ea6f415a-image.png

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                      • S
                        sentein @johnpoz
                        last edited by

                        @johnpoz No freaking idea what i did but now everything is working....

                        johnpozJ 1 Reply Last reply Reply Quote 0
                        • johnpozJ
                          johnpoz LAYER 8 Global Moderator @sentein
                          last edited by

                          @sentein Huh? So you have dhcp running on pfsense.. Thought you said you had a different dhcp server?

                          Also Unless you put unbound into forwarding mode, setting those dns servers is pointless..

                          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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