Date: Wed, 11 Jun 1997 01:43:50 +0100 From: Brian Somers <brian@awfulhak.org> To: mnewton <mnewton@newland.com> Cc: hackers <hackers@FreeBSD.ORG> Subject: Re: any one tried this Message-ID: <199706110043.BAA18839@awfulhak.demon.co.uk> In-Reply-To: Your message of "Tue, 10 Jun 1997 10:31:03 EDT." <339D6527.7411@newland.com>
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> I have one host that has a dynamic ip address assigned each time its
> logs in. I would like to refer to that host by a domain name i.e
> xyz.zzz via a dns on another machine.
> What i need to do is update the dns on the dns server with the
> new ip address every time that pc logs in.
> Any body got any code to do this ?
It should be trivial. You can pass the pseudo MYADDR variable
to a script in linkup:
MYADDR:
delete all
add 0 0 hisaddr
! /usr/local/bin/dnsupdate myhost MYADDR
And in /usr/local/bin/dnsupdate:
#! /bin/sh
host=$1
shift
read a b c d <<eof
`IFS=.; for f; do echo $f; done`
eof
cd /etc/namedb/
bak=`date +%y%m%d%H%M`
mv mynet.zone mynet.zone.$bak
sed "s/^$host[ ].*/$host IN A $a.$b.$c.$d/" mynet.zone.$bak >mynet.zone
mv mynet.rev mynet.rev.$bak
sed "s/.*[ ]$host$/$d.$c.$b.$a. IN PTR $host/" mynet.rev.$bak >mynet.rev
You'll need a small awk/perl script to up your serial number and HUP named
too.
--
Brian <brian@awfulhak.org>, <brian@freebsd.org>
<http://www.awfulhak.org>;
Don't _EVER_ lose your sense of humour....
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