Reverse DNS lookups

WebReactor Networks bind at
Sat Feb 23 03:42:53 UTC 2002

I'll make it easy for you, but RTFM (Read The Fine Manual, or Fine RFC in
this case) anyway; I might have made a mistake.

; ------ Begin db.217.8.136 ------
$TTL 604800
@ IN SOA yourdomain.tld. hostmaster.yourdomain.tld. (
        200202060       ; Serial number
        28800   ; Refresh after (seconds)
        7200    ; Retry after (seconds)
        604800  ; Expire after (seconds)
        86400   ; Negative Cache TTL (seconds)
; Nameserver entries
 IN     NS      ns1.yourdomain.tld.
; Host Entries
1       IN PTR  host1.yourdomain.tld.
2       IN PTR  host2.yourdomain.tld.
3       IN PTR  host3.yourdomain.tld.
4       IN PTR  host4.yourdomain.tld.
; ...where host1's IP address is, and so on
; ------ End db.217.8.136 ------

In named.conf...

zone "" {
        type master;
        file "db.217.8.136";

  - John R. S. 

From: "Christian Opsahl" <copsahl at>
Newsgroups: comp.protocols.dns.bind
Date: Sat, 23 Feb 2002 01:23:13 GMT
To: comp-protocols-dns-bind at
Subject: Reverse DNS lookups

I want to administrate my own reverse, but im a bit out of my league here.

I have 4 ip adresses which my ISP is administrating the reverse for, but i
wanna do this my self. My ISP can forward this to me but, I dont know how to
set up reverse for ip adresses that is`nt a part of a class C net.

Here is an example on how it looks like:


How should the input in my named.conf file be? And how would my zone file
for these ip adresses look like.


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