Archive

Archive for January 30th, 2011

DNS – Pointer Record (PTR)

January 30th, 2011 No comments

Pointer Record (PTR)

Pointer records are the opposite of A and AAAA RRs and are used in Reverse Map zone files to map an IP address (IPv4 or IPv6) to a host name. Read more…

Categories: DNS and BIND, linux Tags:

DNS – IN-ADDR.ARPA Reverse Mapping

January 30th, 2011 No comments

IPv4 IN-ADDR.ARPA Reverse Mapping Domain
We defined the normal domain name structure as a tree starting from the root. We write a normal domain name LEFT to RIGHT but the hierarchical structure is RIGHT to LEFT.

domain name = www.example.com
highest node in tree is = .com
next (lower) = .example
next (lower) = www
Read more…

Categories: DNS and BIND, linux Tags: