yet another reverse dns problem...

[Alexandre Florio]

        Sorry for another reverse DNS misconfig problem, but I've searched the lists and the net but couldn't find the solution... Here it go:

Diagnostics:

        The network block is 200.192.23.0/27;
	Normal DNS lookups are fine;
        ISP DNS server is 200.192.1.36;
        ISP claims it's all correct at his side;
        
        My ISP instructs me to place the following zone in named.conf (using BIND 8.2.3):

        zone "1-30.23.192.200.in-addr.arpa" IN {
                type master;
                notify yes;
                file "pz/1-30.23.192.200.in-addr.arpa";
                allow-transfer {
                  200.192.1.36;
        };

        And here is the file pz/1-30.23.192.200.in-addr.arpa:

        @       IN      SOA     ns.cipher.com.br.       root.cipher.com.br. (
                        2001020507 ; serial
                        28800 ; refresh
                        7200 ; retry
                        1W ; expire
                        86400) ; default_ttl
                NS      ns.cipher.com.br.
                NS      dnsspo1.netstream.com.br.

        1       IN      PTR     router.cipher.com.br.
        2       IN      PTR     kerberos.cipher.com.br.
        17      IN      PTR     gateway.cipher.com.br.
        18      IN      PTR     ns.cipher.com.br.
        19      IN      PTR     server1.cipher.com.br.
	20	IN		PTR		server2.cipher.com.br.
	21	IN		PTR		ntint.cipher.com.br.
	22	IN		PTR		is32.cipher.com.br.

Problem:

        Reverse DNS lookups only works for some randomly hosts at each named initialization:

        $ for a in `echo 1 2 17 18 19 20 21 22`; do host 200.192.23.$a; done
        1.23.192.200.IN-ADDR.ARPA is a nickname for 1.1-30.23.192.200.IN-ADDR.ARPA
        1.1-30.23.192.200.IN-ADDR.ARPA domain name pointer router.cipher.com.br
        Host not found.
        Host not found.
        18.23.192.200.IN-ADDR.ARPA is a nickname for 18.1-30.23.192.200.IN-ADDR.ARPA
        18.1-30.23.192.200.IN-ADDR.ARPA domain name pointer ns.cipher.com.br
        19.23.192.200.IN-ADDR.ARPA is a nickname for 19.1-30.23.192.200.IN-ADDR.ARPA
        19.1-30.23.192.200.IN-ADDR.ARPA domain name pointer server1.cipher.com.br
        20.23.192.200.IN-ADDR.ARPA is a nickname for 20.1-30.23.192.200.IN-ADDR.ARPA
        20.1-30.23.192.200.IN-ADDR.ARPA domain name pointer server2.cipher.com.br
        21.23.192.200.IN-ADDR.ARPA is a nickname for 21.1-30.23.192.200.IN-ADDR.ARPA
        21.1-30.23.192.200.IN-ADDR.ARPA domain name pointer ntint.cipher.com.br
        22.23.192.200.IN-ADDR.ARPA is a nickname for 22.1-30.23.192.200.IN-ADDR.ARPA
        22.1-30.23.192.200.IN-ADDR.ARPA domain name pointer is32.cipher.com.br

        (missed .2 and .17 hosts)
        My resolv.conf is allright (nameserver 200.192.23.18).

        Does anybody knows what can be going on? 
        (ask me if you need more info about config.)

Thanx,
Alexandre Florio