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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 and what rules did you put on these vlans? Where are you pointing for dns? Are these vlans downstream of pfsense or attached?

      A simple dig or nslookup or host or doggo or whatever your fav dns tool is.. What does it show that its pointing for dns? Does that answer, if no then yeah your going to have a really bad day because without dns the internet is useless..

      dns.jpg

      See my client is pointing to 192.168.9.253, my pfsense IP on this network... If that fails, then you don't have unbound listening on that interface? Your firewall rules on this interface do not allow it.. Or maybe your vlan is downstream and not directly attached and the unbound ACLs are not right.. Or maybe you disabled the auto ACLs in unbound? And when you added this new vlan the acls were not updated?

      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 I have attached some of the setting you asked about. I feel like there is something telling about the response from the lookup. I would not know right now what it means but its not right. my brain might be too far gone to mush. I have tried so many things trying to get this to work i probably screwed this up further. As for disabling anything in unbound, i am unsure how i would have done that as i cannot find any menus for that at all. the Vlans are ran through a brocade switch. beyond that there is nothing seperating them from PFsense. so its PFsense/Brocade/Vlan. I guess if any of this triggers anything for you let me know. Or if you want more information i am all ears. Seems like i am in for a bad day but only on the vlans. DI=is works on the regular lan.

        DNS.png FWR1.png Results.png

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        • S
          SteveITS Galactic Empire @sentein
          last edited by

          @sentein Also, restart DNS Resolver after you add the VLAN interface(s).

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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.

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              • 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

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                    • 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

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                      • 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.

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                        • 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

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                          • 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....

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                              • 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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