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Subject: TCP-Group Digest 97/58
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TCP-Group Digest Thu, 12 Jun 97 Volume 97 : Issue 58
Today's Topics:
Primary and secondary DNS Identification (3 msgs)
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----------------------------------------------------------------------
Date: Wed, 11 Jun 97 23:35:44 EST
From: "Ronen Pinchook (4Z4ZQ)" <4z4zq@4Z4ZQ.AMPR.org>
Subject: Primary and secondary DNS Identification
Hello All
Is there a way to know (in NSLOOKUP or any othe program)
if a DNS is the primary or secondary for a domain ???
I mean if a Domain have 7 DNS'es
Who is the DNs that hold the master zone file and who is the one that get the
zone file from the master one
Please Advice
Ronen
-------------------------------------------------------
Ronen Pinchook (4Z4ZQ)
Address : 60 Six days st, Kiryat Haim, Israel 26251 .
Tel 972-4-8730385
Email : 4z4zq@haifa.ampr.org or 4z4zq@4z4zq.ampr.org
Packet : 4z4zq@4x4hf.isr.mdle
-------------------------------------------------------
------------------------------
Date: Thu, 12 Jun 1997 23:42:54 -0700
From: Tim Connolly <kb8eht@access.mountain.net>
Subject: Primary and secondary DNS Identification
If you do a "whois timsnet.com" you will see the primary listed first.
However, to the best of my knowledge, just because its the first DNS
questioned, doesn't mean that it has to have the master zone file. It
could be a secondary from a
dns server which isn't on the list.... In my case anyway....
Ronen Pinchook (4Z4ZQ) wrote:
> Hello All
> Is there a way to know (in NSLOOKUP or any othe program)
> if a DNS is the primary or secondary for a domain ???
> I mean if a Domain have 7 DNS'es
> Who is the DNs that hold the master zone file and who is the one that
> get the
> zone file from the master one
> Please Advice
> Ronen
> -------------------------------------------------------
> Ronen Pinchook (4Z4ZQ)
> Address : 60 Six days st, Kiryat Haim, Israel 26251 .
> Tel 972-4-8730385
> Email : 4z4zq@haifa.ampr.org or 4z4zq@4z4zq.ampr.org
> Packet : 4z4zq@4x4hf.isr.mdle
> -------------------------------------------------------
--
73's - Tim Connolly mailto:tim@timsnet.com
mailto:kb8eht@kb8eht.ampr.org
http://www.timsnet.com/
------------------------------
Date: Thu, 12 Jun 97 06:29:00 -0000
From: mikebw@bilow.bilow.uu.ids.net (Mike Bilow)
Subject: Primary and secondary DNS Identification
4Z4ZQ wrote in a message to Mike Bilow:
4> Is there a way to know (in NSLOOKUP or any othe program)
4> if a DNS is the primary or secondary for a domain ???
4> I mean if a Domain have 7 DNS'es
4> Who is the DNs that hold the master zone file and who is the
4> one that get the zone file from the master one
No. As far as the public is concerned, there are only two kinds of servers
for
any particular domain: authoritative and non-authoritative. It should be
impossible to determine from the outside where the authoritative servers get
their information, and all authoritative servers should be treated as equal.
In fact, it is quite common that all of the authoritative servers accessible
to
the public are secondary, with the primary hidden behind a firewall and only
the secondary servers having access to the primary through the firewall.
The SOA record can be inspected, and good form requires that the location of
the master zone file be indicated. However, almost no software depends upon
this information being correct, so the real information is elsewhere. For
example, standard Unix named secondaries go to whatever is specified in
/etc/named.boot for the zone refresh, ignoring the SOA record information
about
the location of the master zone file. Therefore, the SOA record should be
regarded as an informal courtesy, not as definitively accurate.
-- Mike
------------------------------
End of TCP-Group Digest V97 #58
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