Reverse for a /23

[Joseph S D Yao]

On Tue, Dec 21, 1999 at 06:05:51PM -0500, Stephen Amadei wrote:
> O.K... I haven't been able to get ahold of a up to date Cricket book...
> (mine is revision 1) and I have read RFC2317... but I am still having
> nothing but problems doing reverse for a supernet... in this case, a /23.
> 
> I am feeling really stupid and need someone to explain this to me step by
> step... ;-)
> 
> I am running BIND 8.1.2 and lets say I am trying to set up reverse for
> 192.168.218.0/23 (192.168.218.0/24 and 192.168.219.0/24).
> 
> I put in my named.conf:
> 
> zone "218/23.168.192.in-addr.arpa" {
> 	type master;
> 	file "db.192.168.218";
> };
> 
> And I put in db.192.168.218:
> 
> 218/23.251.204.in-addr.arpa.	IN SOA ns.our.net someone.our.net (
> 				1999121701	;Serial
> 				10800		;Refresh after 3 hours
> 				3600		;Retry after 1 hour
> 				604800		;Expire after 1 week
> 				86400	)	;Minimum TTL of 1 day
> 
> 218/23.251.204.in-addr.arpa.	IN NS	ns.our.net.
> 218/23.251.204.in-addr.arpa.	IN NS	ns2.our.net.
> 
> 1.218.251.204.in-addr.arpa.	IN PTR	blah.our.net.
> 129.218.251.204.in-addr.arpa.	IN PTR	blah2.our.net.
> 1.219.251.204.in-addr.arpa.	IN PTR	blah3.our.net.
> 22.219.251.204.in-addr.arpa.	IN PTR	blah4.our.net.
> 
> When I HUP BIND, it just gets all upset and drops the whole zone.
> 
> Maybe I've read RFC2317 totally wrong, but the bottom line is I'm confused
> over the whole situation.
> 
> 					----Steve
> Stephen Amadei
> Systems Admin
> Dandy.NET
> Atlantic City, NJ

More recent versions of DNS are much more strict about what they will
allow as a domain name.  They will only allow characters in a domain
name that are also valid in a host name.  So "/" is out.

HOWEVER, why bother with all this?  Why not just implement the two
reverse-DNS zones 218.168.192.in-addr.arpa and 219.168.192.in-addr.arpa?

Get your copy from Amazon, or readmedotdoc.com, or bookpool.com, or
linuxmall.com, or somewhere.  They even deliver to A.C.  ;-)

-- 
Joe Yao				jsdy at cospo.osis.gov - Joseph S. D. Yao
COSPO/OSIS Computer Support					EMT-B
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