OT Wikipedia DNS

Discussion in 'Computer Support' started by Mike Easter, Jan 3, 2006.

  1. Mike Easter

    Mike Easter Guest

    While tinkering with the various server recursions and delegations under
    the roots, I came/stumbled across how wikipedia 'does it'.

    Wikipedia has 'frontward' and 'backward' names for its
    www.wikipedia.org. First we get some addresses for it

    01/03/06 04:11:35 dns www.wikipedia.org
    Canonical name: rr.pmtpa.wikimedia.org
    Aliases:
    www.wikipedia.org
    rr.wikimedia.org
    Addresses:
    207.142.131.235
    207.142.131.236
    207.142.131.245
    207.142.131.246
    207.142.131.247
    207.142.131.248
    207.142.131.202
    207.142.131.203
    207.142.131.204
    207.142.131.205
    207.142.131.206
    207.142.131.210
    207.142.131.213
    207.142.131.214

    Then, we take those IPs and put them into rDNS configuration and dig the
    in-addr.arpa result

    Dig 235.131.142.207.in-addr.arpa@207.69.188.185 ...
    Non-authoritative answer
    Recursive queries supported by this server
    Query for 235.131.142.207.in-addr.arpa type=255 class=1
    235.131.142.207.in-addr.arpa CNAME (Canonical Name)
    235.131.142.207.rev.wikimedia.org
    142.207.in-addr.arpa NS (Nameserver) auth1.dns.cogentco.com
    142.207.in-addr.arpa NS (Nameserver) auth2.dns.cogentco.com
    auth1.dns.cogentco.com A (Address) 66.28.0.14
    auth2.dns.cogentco.com A (Address) 66.28.0.30

    Every one of them has a cname like that
    235.131.142.207.rev.wikimedia.org -- the 'backward' name on
    rev.wikimedia.org

    245.131.142.207.rev.wikimedia.org
    246.131.142.207.rev.wikimedia.org
    247.131.142.207.rev.wikimedia.org
    248.131.142.207.rev.wikimedia.org
    202.131.142.207.rev.wikimedia.org
    203.131.142.207.rev.wikimedia.org
    204.131.142.207.rev.wikimedia.org
    205.131.142.207.rev.wikimedia.org

    etc etc x all 14 IPs.

    Kinda cute.

    --
    Mike Easter
     
    Mike Easter, Jan 3, 2006
    #1
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  2. Mike Easter

    Mike Easter Guest

    Mike Easter wrote:
    > While tinkering with the various server recursions and delegations


    Oops. I meant this to be OT in another group. 'scuse and disregard.

    Hopefully it will cancel a few places.


    --
    Mike Easter
     
    Mike Easter, Jan 3, 2006
    #2
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