INFORMATICS

Jak odnaleźć serwer który obsługuje DNS wybranej strony

wydajemy polecenie:

nslookup -type=A -debug 4w1.eu

C:\Users\ob>nslookup -type=A -debug 4w1.eu
------------
Got answer:
    HEADER:
        opcode = QUERY, id = 1, rcode = NOERROR
        header flags:  response, auth. answer, want recursion, recursion avail.
        questions = 1,  answers = 1,  authority records = 1,  additional = 1

    QUESTIONS:
        5.100.168.192.in-addr.arpa, type = PTR, class = IN
    ANSWERS:
    ->  5.100.168.192.in-addr.arpa
        name = draco.wan
        ttl = 38400 (10 hours 40 mins)
    AUTHORITY RECORDS:
    ->  100.168.192.in-addr.arpa
        nameserver = dns.wan
        ttl = 38400 (10 hours 40 mins)
    ADDITIONAL RECORDS:
    ->  dns.wan
        internet address = 192.168.100.5
        ttl = 38400 (10 hours 40 mins)

------------
Server:  draco.wan
Address:  192.168.100.5

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

    QUESTIONS:
        4w1.eu.cisco, type = A, class = IN
    AUTHORITY RECORDS:
    ->  cisco
        ttl = 57 (57 secs)
        primary name server = ns1.dns.nic.cisco
        responsible mail addr = hostmaster.neustar.biz
        serial  = 1495002003
        refresh = 900 (15 mins)
        retry   = 900 (15 mins)
        expire  = 604800 (7 days)
        default TTL = 60 (1 min)

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

    QUESTIONS:
        4w1.eu.cisco, type = A, class = IN
    AUTHORITY RECORDS:
    ->  cisco
        ttl = 57 (57 secs)
        primary name server = ns1.dns.nic.cisco
        responsible mail addr = hostmaster.neustar.biz
        serial  = 1495002003
        refresh = 900 (15 mins)
        retry   = 900 (15 mins)
        expire  = 604800 (7 days)
        default TTL = 60 (1 min)

------------
------------
Got answer:
    HEADER:
        opcode = QUERY, id = 4, rcode = NOERROR
        header flags:  response, want recursion, recursion avail.
        questions = 1,  answers = 1,  authority records = 2,  additional = 0

    QUESTIONS:
        4w1.eu, type = A, class = IN
    ANSWERS:
    ->  4w1.eu
        internet address = 217.173.179.28
        ttl = 75790 (21 hours 3 mins 10 secs)
    AUTHORITY RECORDS:
    ->  4w1.eu
        nameserver = ns18.ovh.net
        ttl = 75790 (21 hours 3 mins 10 secs)
    ->  4w1.eu
        nameserver = dns18.ovh.net
        ttl = 75790 (21 hours 3 mins 10 secs)

------------
Non-authoritative answer:
Name:    4w1.eu
Address:  217.173.179.28

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