DNS recommendations - the paper

>> * The PTR section contains a possible mistake - are you sure you can write:
>>   123.45.67.8     IN     PTR     mail.cust.com.
>> 
>> yes, but only in the in-addr.arpa. zone does it have useful meaning.

OK - I took my "toy" (an old Linux box w/BIND 8.1.2 installed). I created a
bogus reverse zone 1.168.192.in-addr.arpa. Here is the zone file:

@		IN	SOA	ns.nic.yu. hostmaster.nic.yu. (
				1997092300 10800 3600 604800 86400 )
		IN	NS	ns.nic.yu.
		IN	NS	ns2.nic.yu.

192.168.1.1	IN	PTR	aaa.yyy.zz.
2		IN	PTR	bbb.yyy.zz.

Remark: the first record is created according to the Elmar's text. The
latter is a regular record. Now, watch what host utility gives:

~> host 192.168.1.1
192.168.1.1 has no PTR record (Authoritative answer)    
~> host 192.168.1.2
Name: bbb.yyy.zz
Address: 192.168.1.2

Conclusion? Let's see what really happened:

~> host -alv 1.168.192.in-addr.arpa

1.168.192.in-addr.arpa.			86400	IN	NS	ns.nic.yu.
1.168.192.in-addr.arpa.			86400	IN	NS	ns.nic.yu.
2.1.168.192.in-addr.arpa.		86400	IN	PTR	bbb.yyy.zz.
192.168.1.1.1.168.192.in-addr.arpa.	86400	IN	PTR	aaa.yyy.zz.

Look at the last PTR record - think it looks ok? ;-)

Regards,
Beri

.-------.
| --+-- |  Berislav Todorovic, B.Sc.E.E.     | E-mail: BERI at etf.bg.ac.yu
|  /|\     Hostmaster of the YU TLD          | 
|-(-+-)-|  School of Electrical Engineering  | Phone:  (+381-11) 3221-419
|  \|/     Bulevar Revolucije 73             |                   3370-106
| --+-- |  11000 Belgrade SERBIA, YUGOSLAVIA | Fax:    (+381-11) 3248-681
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