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[public-dns-discuss] Can't resolve my domain with google public dns.




2018/05/04
Thailand
OS Windows Server
rmutl.ac.th and other subdomains 

Step 1: https://intodns.com/rmutl.ac.th
Step 2: 
C:\Users\>tracert -d 8.8.8.8

Tracing route to 8.8.8.8 over a maximum of 30 hops

  1    <1 ms    <1 ms    <1 ms  203.158.167.1
  2    <1 ms    <1 ms    <1 ms  192.168.254.1
  3     3 ms     3 ms     3 ms  202.28.29.29
  4    18 ms    20 ms    18 ms  100.64.249.21
  5    14 ms    15 ms    15 ms  122.155.230.81
  6    16 ms    15 ms    15 ms  61.19.7.202
  7    43 ms    43 ms    43 ms  72.14.210.204
  8    48 ms    46 ms    47 ms  108.170.254.225
  9    46 ms    46 ms    46 ms  209.85.246.89
 10    45 ms    45 ms    45 ms  8.8.8.8

Trace complete.

Step 3: 
C:\Users\>nslookup -debug www.rmutl.ac.th 8.8.8.8
------------
Got answer:
    HEADER:
        opcode = QUERY, id = 1, rcode = NOERROR
        header flags:  response, want recursion, recursion avail.
        questions = 1,  answers = 1,  authority records = 0,  additional = 0

    QUESTIONS:
        8.8.8.8.in-addr.arpa, type = PTR, class = IN
    ANSWERS:
    ->  8.8.8.8.in-addr.arpa
        name = google-public-dns-a.google.com
        ttl = 21599 (5 hours 59 mins 59 secs)

------------
Server:  google-public-dns-a.google.com
Address:  8.8.8.8

------------
Got answer:
    HEADER:
        opcode = QUERY, id = 2, rcode = SERVFAIL
        header flags:  response, want recursion, recursion avail.
        questions = 1,  answers = 0,  authority records = 0,  additional = 0

    QUESTIONS:
        www.rmutl.ac.th, type = A, class = IN

------------
------------
Got answer:
    HEADER:
        opcode = QUERY, id = 3, rcode = SERVFAIL
        header flags:  response, want recursion, recursion avail.
        questions = 1,  answers = 0,  authority records = 0,  additional = 0

    QUESTIONS:
        www.rmutl.ac.th, type = AAAA, class = IN

------------
------------
Got answer:
    HEADER:
        opcode = QUERY, id = 4, rcode = SERVFAIL
        header flags:  response, want recursion, recursion avail.
        questions = 1,  answers = 0,  authority records = 0,  additional = 0

    QUESTIONS:
        www.rmutl.ac.th, type = A, class = IN

------------
------------
Got answer:
    HEADER:
        opcode = QUERY, id = 5, rcode = SERVFAIL
        header flags:  response, want recursion, recursion avail.
        questions = 1,  answers = 0,  authority records = 0,  additional = 0

    QUESTIONS:
        www.rmutl.ac.th, type = AAAA, class = IN

------------
*** google-public-dns-a.google.com can't find www.rmutl.ac.th: Server failed

Step 5:
C:\Users\>nslookup www.rmutl.ac.th 4.2.2.1
Server:  a.resolvers.level3.net
Address:  4.2.2.1

Non-authoritative answer:
Name:    www.rmutl.ac.th
Address:  203.158.167.20


C:\Users\>nslookup www.rmutl.ac.th 4.2.2.2
Server:  b.resolvers.Level3.net
Address:  4.2.2.2

Non-authoritative answer:
Name:    www.rmutl.ac.th
Address:  203.158.167.20


C:\Users\>nslookup www.rmutl.ac.th 208.67.222.222
Server:  resolver1.opendns.com
Address:  208.67.222.222

Non-authoritative answer:
Name:    www.rmutl.ac.th
Address:  203.158.167.20

C:\Users\>nslookup www.rmutl.ac.th 208.67.220.220
Server:  resolver2.opendns.com
Address:  208.67.220.220

Non-authoritative answer:
Name:    www.rmutl.ac.th
Address:  203.158.167.20

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