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    [DNS Resolver] Cannot resolve t.co

    Scheduled Pinned Locked Moved DHCP and DNS
    17 Posts 3 Posters 3.3k Views
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    • F
      fab1330
      last edited by

      @doktornotor:

      Yeah, your DNS configuration is broken. No information provided to debug anything here.

      Configuration :

      General settings:
------------------

Enable : checked
Listen port : empty
Network Interfaces : LAN
Outgoing Network Interfaces : WAN
DNSSEC : checked
DNS Query Forwarding : unchecked
DHCP Registration : checked
Static DHCP : checked
TXT Comment Support : checked

On the other tabs, everything is default

      Interfaces configuration:

      
LAN : Static IPv4 Configuation : 10.0.0.1/24
WAN : PPPoE Internet Access

      Nothing to report in the log of resolver. And no problem to solve other TLDs that "co"

      What I can provide such other information?

      thanks :)

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

        
nslookup - 10.0.0.1
set querytype=soa
co.

        Post the output of the above. This is what I get:

        
Non-authoritative answer:
co
        primary name server = ns1.cctld.co
        responsible mail addr = hostmaster.neustar.biz
        serial  = 2018084018
        refresh = 900 (15 mins)
        retry   = 900 (15 mins)
        expire  = 604800 (7 days)
        default TTL = 86400 (1 day)

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

          @doktornotor:

          
nslookup - 10.0.0.1
set querytype=soa
co.

          nslookup co

          C:\Users\Fab>nslookup
Address:  10.0.0.1
> set type=soa
> co.
Server :   UnKnown
Address:  10.0.0.1

*** UnKnown ne parvient pas à trouver co. : Server failed

          For .com, it's work :

          C:\Users\Fab>nslookup
Address:  10.0.0.1
> set type=soa
> com.
Serveur :   UnKnown
Address:  10.0.0.1

Réponse ne faisant pas autorité :
com
        primary name server = a.gtld-servers.net
        responsible mail addr = nstld.verisign-grs.com
        serial  = 1423413582
        refresh = 1800 (30 mins)
        retry   = 900 (15 mins)
        expire  = 604800 (7 days)
        default TTL = 86400 (1 day)

com     nameserver = a.gtld-servers.net
com     nameserver = b.gtld-servers.net
com     nameserver = m.gtld-servers.net
com     nameserver = g.gtld-servers.net
com     nameserver = k.gtld-servers.net
com     nameserver = f.gtld-servers.net
com     nameserver = c.gtld-servers.net
com     nameserver = d.gtld-servers.net
com     nameserver = j.gtld-servers.net
com     nameserver = l.gtld-servers.net
com     nameserver = h.gtld-servers.net
com     nameserver = i.gtld-servers.net
com     nameserver = e.gtld-servers.net
          1 Reply Last reply Reply Quote 0
          • 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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