Re: [cobalt-users] rdns, uneven blocks, PTR records, blocks smaller than CLASS C BLOCK

["E.B. Dreger" <eddy+public+spam@xxxxxxxxxxxxxxxxx>]

> Date: Mon, 28 Jan 2002 12:08:38 -0500
> From: Cobalt User <cobalt-users@xxxxxxxxxxxxxx>

(Guys and gals, _please_ wrap your lines at a decent length...)

> has anyone successfully setup reverse dns to a block smaller than a /24
> (class c) using a raq for the nameserver
> 
> i got my isp to delegate me reverse dns authority for my /26 (64 addresses)
> 
> this block will be added into my raq that i am using as a nameserver for
> reverse resolution
> 
> let's say the block is 192.168.1.192/26 (192 to 255, 193 to 254 usable)
> lets say xx represents a number from 193 to 254 for the scope of this
> document

So what are the real addresses?  As Jeff mentions, it's far
easier to do a quick dig, nslookup, rwhois on the _real_ block
than typing out three pages of theory.

> since this is not an even 8, 16, or 24 bit ip cidr block (old class a,b,c) ,
> they did it as tt.1.168.192.in-addr.arpa
> where tt are actual letters 'tt', nn.nn.nn is my ip block first three
> components, since there are other subscribers within the same C BLOCK they
> can't delegate me the whole C BLOCK

RFC 2317 in action.

http://www.rfc-editor.org/rfc/rfc2317.txt

> each xx.1.168.192.in-addr.arpa in their dns table is CNAMEd to
> xx.tt.1.168.192.in-addr.arpa on their end
> 
> they listed me as the name server for tt.1.168.192.in-addr.arpa
> 
> 
> i tried to manually create a zone 192-26.tt.1.168.192.in-addr.arpa and the
> raq deleted it upon reboot

Deleted the zone files?  The zone quit resolving?

> i tried to manually enter 192.168.1.tt.xx into reverse dns ptrs in the gui
> but it won't take it, wants all numbers
> 
> when i do a dig on an ip within the block from a workstation it pulls up the
> cname but still tries to use their NS instead of the NS delegated for the
> tt.1.168.192.in-addr.arpa block
> 
> would appreciate pointers (no pun intended) from anyone having experience
> with this

Create a zone that matches xx.1.168.192.in-addr.arpa, and add
entries as appropriate.

If you'd posted the actual IPs...

> Jon


Eddy

Brotsman & Dreger, Inc. - EverQuick Internet Division
Phone: +1 (316) 794-8922 Wichita/(Inter)national
Phone: +1 (785) 865-5885 Lawrence
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