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    [DNS Resolver] Cannot resolve t.co

    Scheduled Pinned Locked Moved DHCP and DNS
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    • D
      doktornotor Banned
      last edited by

      What does

      
set querytype=soa
root
co.

      produce?

      1 Reply Last reply Reply Quote 0
      • F
        fab1330
        last edited by

        @doktornotor:

        What does

        
set querytype=soa
root
co.

        produce?

        C:\Users\Fab>nslookup
Address:  10.0.0.1
> set querytype=soa
> root
Default server :   A.ROOT-SERVERS.NET
Addresses:  2001:503:ba3e::2:30
          198.41.0.4

> co.
Server :   A.ROOT-SERVERS.NET
Addresses:  2001:503:ba3e::2:30
          198.41.0.4

DNS request timed out.
    timeout was 2 seconds.
*** Request time out A.ROOT-SERVERS.NET.
        1 Reply Last reply Reply Quote 0
        • D
          doktornotor Banned
          last edited by

          Talk to your ISP about what they are doing with DNS.

          
Default Server:  A.ROOT-SERVERS.NET
Addresses:  2001:503:ba3e::2:30
          198.41.0.4

> co.
Server:  A.ROOT-SERVERS.NET
Addresses:  2001:503:ba3e::2:30
          198.41.0.4

co      nameserver = ns1.cctld.co
co      nameserver = ns2.cctld.co
co      nameserver = ns3.cctld.co
co      nameserver = ns4.cctld.co
co      nameserver = ns5.cctld.co
co      nameserver = ns6.cctld.co
ns1.cctld.co    internet address = 156.154.100.25
ns2.cctld.co    internet address = 156.154.101.25
ns3.cctld.co    internet address = 156.154.102.25
ns4.cctld.co    internet address = 156.154.103.25
ns5.cctld.co    internet address = 156.154.104.25
ns6.cctld.co    internet address = 156.154.105.25
ns1.cctld.co    AAAA IPv6 address = 2001:502:2eda::21
ns2.cctld.co    AAAA IPv6 address = 2001:502:ad09::21
ns3.cctld.co    AAAA IPv6 address = 2610:a1:1009::21
ns4.cctld.co    AAAA IPv6 address = 2610:a1:1010::21
ns5.cctld.co    AAAA IPv6 address = 2610:a1:1011::21
ns6.cctld.co    AAAA IPv6 address = 2610:a1:1012::21
          1 Reply Last reply Reply Quote 0
          • F
            fab1330
            last edited by

            @doktornotor:

            Talk to your ISP about what they are doing with DNS.

            Why would my ISP be the problem?
            If I use the DNS Forwarder it works

            1 Reply Last reply Reply Quote 0
            • D
              doktornotor Banned
              last edited by

              @fab1330:

              Why would my ISP be the problem?

              Because it's clearly blocking/hijacking UDP/53 DNS traffic. When you cannot talk to root servers, you've got a problem.

              1 Reply Last reply Reply Quote 0
              • F
                fab1330
                last edited by

                @doktornotor:

                Because it's clearly blocking/hijacking UDP/53 DNS traffic. When you cannot talk to root servers, you've got a problem.

                It's strange, I haven't changed anything and now it works. Maybe it is a routing problem at my ISP?

                Now :

                C:\Users\Fab>nslookup t.co
Address:  10.0.0.1

Non-authoritative response :
Name :    t.co
Addresses:  199.16.156.11
          199.16.156.75

                I monitor in the coming days. thank you

                1 Reply Last reply Reply Quote 0
                • D
                  doktornotor Banned
                  last edited by

                  Well if it breaks again… check you can resolve stuff via root nameservers. Unbound cannot work without those unless forwarding is enabled. Also, extremely weird why it'd be limited to .co TLD

                  1 Reply Last reply Reply Quote 0
                  • F
                    fab1330
                    last edited by

                    @doktornotor:

                    Well if it breaks again… check you can resolve stuff via root nameservers. Unbound cannot work without those unless forwarding is enabled. Also, extremely weird why it'd be limited to .co TLD

                    The problem comes back randomly :-(

                    And I have changed ISP meantime. So this is not an ISP problem.

                    C:\Users\Fab>dig t.co

; <<>> DiG 9.10.1-P1 <<>> t.co
;; global options: +cmd
;; connection timed out; no servers could be reached

C:\Users\Fab>dig co

; <<>> DiG 9.10.1-P1 <<>> co
;; global options: +cmd
;; connection timed out; no servers could be reached

C:\Users\Fab>dig co. NS

; <<>> DiG 9.10.1-P1 <<>> co. NS
;; global options: +cmd
;; connection timed out; no servers could be reached

C:\Users\Fab>dig co. SOA

; <<>> DiG 9.10.1-P1 <<>> co. SOA
;; global options: +cmd
;; connection timed out; no servers could be reached

C:\Users\Fab>nslookup
Address:  10.0.0.1

> set querytype=soa
> root
Default server :   A.ROOT-SERVERS.NET
Addresses:  2001:503:ba3e::2:30
          198.41.0.4

> co.
Serveur :   A.ROOT-SERVERS.NET
Addresses:  2001:503:ba3e::2:30
          198.41.0.4

co      nameserver = ns1.cctld.co
co      nameserver = ns2.cctld.co
co      nameserver = ns3.cctld.co
co      nameserver = ns4.cctld.co
co      nameserver = ns5.cctld.co
co      nameserver = ns6.cctld.co
ns1.cctld.co    internet address = 156.154.100.25
ns2.cctld.co    internet address = 156.154.101.25
ns3.cctld.co    internet address = 156.154.102.25
ns4.cctld.co    internet address = 156.154.103.25
ns5.cctld.co    internet address = 156.154.104.25
ns6.cctld.co    internet address = 156.154.105.25
ns1.cctld.co    AAAA IPv6 address = 2001:502:2eda::21
ns2.cctld.co    AAAA IPv6 address = 2001:502:ad09::21
ns3.cctld.co    AAAA IPv6 address = 2610:a1:1009::21
ns4.cctld.co    AAAA IPv6 address = 2610:a1:1010::21
ns5.cctld.co    AAAA IPv6 address = 2610:a1:1011::21
ns6.cctld.co    AAAA IPv6 address = 2610:a1:1012::21

                    Any idea?

                    thanks :)

                    1 Reply Last reply Reply Quote 0
                    • C
                      cmb
                      last edited by

                      Make sure you have "harden glue" enabled on the Advanced tab. If you don't, it might be possible for some malicious query reply to break a TLD.

                      1 Reply Last reply Reply Quote 0
                      • F
                        fab1330
                        last edited by

                        @cmb:

                        Make sure you have "harden glue" enabled on the Advanced tab. If you don't, it might be possible for some malicious query reply to break a TLD.

                        I just activate "harden glue", and it works:-) Thanks!
                        But I do not understand what is this option. You can tell me more?

                        1 Reply Last reply Reply Quote 0
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