full-disclosure - Full-Disclosure digest- good reverse dns server

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

From: kluge at fujitsu.com.au (Steffen Kluge)
Subject: Full-Disclosure digest- good reverse dns
	server

On Thu, 2003-07-03 at 19:43, Philip Stortz wrote:
> does any one know of a free reverse dns server that's good? 

You can set up your own free reverse DNS server. The trick is to get the
respective netblock owners to delegate authority to your box ;-)

> the dns servers my isp provides frequently fail to identify the owners
> of ip# in my firewall log.  while i do sometimes manually look them up
> at arin.net etc., i'd really like to find a reverse dns server to
> identify all those ip#,

There is none. Arin only delegates in-addr.arpa zones to DNS hosters
nominated by the respective netblock owner. Those DNS hosters may decide
to sub-delegate (e.g. when a part of the netblock is re-leased to a
customer), but ISP's don't sub-delegate all of their subscriber address
space to one big free reverse DNS server.

If a netblock owner chooses not to host reverse zones for their IP
subnets, or to run dogdy DNS servers, or to host meaningless reverse
entries (like your-own-ip-address.dial-up-suckers.isp.net), there is
nothing you can do about it.

Whois is your best bet.

Cheers
Steffen.