*BSD News Article 69907


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From: sthaug@nethelp.no (Steinar Haug)
Newsgroups: comp.protocols.tcp-ip.domains,comp.os.linux.networking,comp.unix.bsd.freebsd.misc
Subject: Re: Classless IN-ADDR.ARPA and resolver PROBLEM (gethostby*.getanswer)
Date: 01 Jun 1996 07:14:21 GMT
Organization: Nethelp Consulting, Trondheim, Norway
Lines: 22
Distribution: inet
Message-ID: <dkqoo4.nv7.ln@verdi.nethelp.no>
References: <slrn4qu6d8.3vl.map@marikit.iphil.net> <slrn4qvae1.9ft.map@marikit.iphil.net>
NNTP-Posting-Host: trane.uninett.no
In-reply-to: map@marikit.iphil.net's message of 1 Jun 1996 02:29:09 GMT
Xref: euryale.cc.adfa.oz.au comp.protocols.tcp-ip.domains:10552 comp.os.linux.networking:40334 comp.unix.bsd.freebsd.misc:20454

[Miguel A.L. Paraz]

|   >May 31 23:51:24 server in.telnetd[16858]: gethostby*.getanswer: 
|   >asked for "4.4.176.203.in-addr.arpa", got "4.0.4.176.203.in-addr.arpa"
|   
|   I located the source of the error message - it's not in tcpd,
|   but in the resolver code - I found it in the C library (libc.a).
|   It potentially would break anything that depends on IP address
|   to name lookups.  So far, the effect here is that tcpd rejects
|   connections from systems with 'allowed' domain names.
|   
|   DNS-aware tools such as 'nslookup' and 'dig' are just fine.
|   
|   I believe this has to be fixed before 
|   draft-ietf-cidrd-classless-inaddr-01.txt becomes a standard.

This *is* fixed in 4.9.3-REL. Actually it was fixed earlier than that
(4.9.3-BETA26 or thereabouts).

Upgrade your software.

Steinar Haug, Nethelp consulting, sthaug@nethelp.no