nanog mailing list archives

RE: Detecting a non-existent domain


From: "David Schwartz" <davids () webmaster com>
Date: Tue, 23 Sep 2003 14:46:40 -0700



On Tue, 23 Sep 2003, Kee Hinckley wrote:

Getting practical for a minute.  What is the optimal way now to see
if a given host truly exists?  Assume that I can't control the DNS

Look for a SOA record for the domain - this should be the proper way to
check for the existance of a domain, instead of looking for A, NS or MX
records..

        He asked for the "optimal way" "to see if a given host truly exists" and
you told him how to confirm or deny the "existance of a domain". He asked
about hosts, you answered about domains.

        DS



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