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[public-dns-discuss] Re: Incorrect cached results for ddns.net address Showing



I am seeing similar issues from Australia to 8.8.8.8 
See my ticket
https://groups.google.com/forum/#!topic/public-dns-discuss/sqDo5fppsc8

Do you have access to test 8.8.8.8 from another geo location?


On Friday, June 29, 2018 at 4:09:10 AM UTC+10, mitch... AT gmail.com wrote:
Hi Support,
Getting some unusual results from 8.8.8.8 for our subdomain supportcentre.ddns.net
This is occurring across Australia, on around 1400 windows workstations

The correct IP address that is currently set on the Name servers is 220.233.202.9
This has been updated from 115.70.133.218 at least 4 days ago and has been present since.
I went through the flush cache link for the public DNS.

C:\Users\Mitch>nslookup -q=a -debug supportcentre.ddns.net 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
        ttl = 21585 (5 hours 59 mins 45 secs)

------------
Address:  8.8.8.8

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

    QUESTIONS:
        supportcentre.ddns.net, type = A, class = IN
    ANSWERS:
        internet address = 115.70.133.218
        ttl = 59 (59 secs)

------------
Non-authoritative answer:
Address:  115.70.133.218


C:\Users\Mitch>nslookup -q=a -debug supportcentre.ddns.net 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
        ttl = 21581 (5 hours 59 mins 41 secs)

------------
Address:  8.8.8.8

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

    QUESTIONS:
        supportcentre.ddns.net, type = A, class = IN
    ANSWERS:
        internet address = 220.233.202.9
        ttl = 27 (27 secs)

------------
Non-authoritative answer:
Address:  220.233.202.9

http://dnsviz.net/d/supportcentre.ddns.net/dnssec/

https://intodns.com/ddns.net

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