named question

Dan Egli ddavidegli at gmail.com
Thu Sep 19 02:06:05 MDT 2013


Hey pluggers, appearently my Google skills aren't up to snuff today or
something. I'm trying to figure something out with the reverse DNS mapping.



In a situation where a Class B subnet (let's use 192.168.0.0) has been
broken into multiple chunks, each larger than a Class C (say, 4 CLASS C
ranges combined, 1024 addresses, .0.0 - .3.255, 255.255.252.0 netmask,
right?) How does the name service daemon (named) know that, for example
address 192.168.2.11 resolves to the 0.168.192.in-addr.arpa net used in
reverse resolution?  Especially when the address is placed in the named
zone file(s) by dhcpd (via ddns updates)? Is there some special header in
the zone file or the config file that would indicate this?



Thanks

--- Dan


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