Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!uakari.primate.wisc.edu!aplcen!jhunix!ecf_hap
From: ecf_hap@jhunix.HCF.JHU.EDU (Andrew Poling)
Newsgroups: comp.mail.sendmail
Subject: Re: How to recognize domain literals (was Re: How to use IP addresses ...)
Summary: alot of needless work...
Message-ID: <3472@jhunix.HCF.JHU.EDU>
Date: 1 Dec 89 22:51:09 GMT
References: <8911292029.AA13662@jvncf.csc.org> <wZRL3aK00VsLA11Y1Z@andrew.cmu.edu> <1436@utkcs2.cs.utk.edu>
Reply-To: ecf_hap@jhunix.UUCP (Andrew Poling)
Followup-To: comp.mail.sendmail
Organization: The Johns Hopkins University - HCF
Lines: 39

In article <1436@utkcs2.cs.utk.edu> moore@cs.utk.edu (Keith Moore) writes:
>In article <wZRL3aK00VsLA11Y1Z@andrew.cmu.edu>,
>	cfe+@andrew.cmu.edu (Craig F. Everhart) writes:
>(lamenting the fact that most sendmail sites don't recognize domain literals)
>>There's no cure but for the target administrator to fix the 
>>sendmail.cf file to recognize explicit dotted-quads, alas, [...]
>While it's true that many sites running sendmail don't recognize
>domain literals, you don't have to hard-code the IP address into
>every machine's sendmail.cf file.  The example below shows how.
[shows one method of recognizing domain literals using canonicalization]

Wail hail, it's even easier than that if you have functional $[ and $]
canonicalization.  In that case, attempting to canonicalize the address
should return the hosts domain name anyway.

I'm sure that most of the sites Craig was referring to don't yet have the
ability to canonicalize using $[ and $].  In that case, one DOES have to
hard-code their address in.  it need not be difficult.  in the generic
sendmail.cf files that I distribute, all such host specific info is assigned
to various macros at the beginning of the file.  So I do it this way:

near the top of /usr/lib/sendmail.cf
# change "255.255.255.255" below to YOUR IP-address
DA255.255.255.255

then in ruleset 0
# recognize my IP-address - make it my name
R$+<@[$A]>		$1<@$w>		w macro is our simple hostname


There... that didn't hurt too bad. :-)


-Andy

Andy Poling                              Internet: andy@gollum.hcf.jhu.edu
Network Services Group                   Bitnet: ANDY@JHUVMS
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