Interesting subdomain question.
alank at starbug.net
Tue Nov 23 19:36:47 UTC 1999
I have run into an interesting dns issue with a server under my
This server is primary for domain z.com. Under z.com, there exists
several subdomains for regional offices. such as:
So far, no problem!
But, in the zone file for z.com, subdomains a, b, and c are not officially
delegated. There are no records in z.com's zone file like this:
a 86400 IN NS ns1.a.z.com
86400 IN NS ns2.a.z.com
ns1.a.z.com 86400 IN A 126.96.36.199
ns2.a.z.com 86400 IN A 188.8.131.52
The primary name server for z.com is a secondary of all of the subdomains
in question. So the zone files for the subdomains are being pulled in from
the relevant subdomain name servers.
But when I check the zone transfers on the secondaries for z.com, the
delegation information for a.z.com, b.z.com, and c.z.com is included in
z.com zone transfer. Nothing on the primary for z.com is telling it about
the subdomain delegation.
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