NS RR's
Khachaturov, Vassilii
Vassilii at icomverse.com
Tue Nov 9 09:04:43 UTC 1999
It's perfectly legal for the same IP to be a nameserver for several domains.
The setup you provided only lists glue records for the domain[a-c].com
domains. It doesn't show delegation records from .com -- hopefully you
understand it's the delegation that actually addresses a client to the right
nameserver, not the glue!
in-addr doesn't matter here.
FYI: only one nameserver is illegal by the DNS RFC.
You MUST provide at least two, which belong to different
* physical networks
* have different physical locations
* have no common link shared (e.g., satellite link to the backbone)
* have no electricity link shared (meltdown of one's power station doesn't
affect the other)
Also, at least one of the servers should not be inside its domain -- that
can be typically arranged with an ISP.
HTH,
Vassilii Khachaturov
http://www.tarunz.org/~vassilii/
Skribu al mi per Esperanto!
-----Original Message-----
From: Keith Hermansader [mailto:keith at hermansader.net]
Sent: Monday, November 08, 1999 8:50 AM
To: comp-protocols-dns-bind at moderators.isc.org
Subject: NS RR's
Will it work assigning multiple NS hostnames using a single IP address,
provided that A records are used? Does it matter if the IN-ADDR
response is different?
Basically what I want to do is this:
domain a:
NS ns.domaina.com
ns A 192.168.1.10
domain b:
NS ns.domainb.com
ns A 192.168.1.10
domain c:
NS ns.domainc.com
ns A 192.168.1.10
The in-addr lookup for 192.168.1.10 would report host1234.domainx.net
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