Date: Sat, 8 Mar 2003 22:34:19 -0600 From: David Kelly <dkelly@HiWAAY.net> To: FreeBSD-Questions@FreeBSD.org Subject: Re: DHCP Server "learning" name servers since server itself is dhcp'd?? Message-ID: <200303082234.19615.dkelly@HiWAAY.net> In-Reply-To: <20030308102326.G6008-100000@atlas.home> References: <20030308102326.G6008-100000@atlas.home>
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On Saturday 08 March 2003 12:32 pm, Mikko Työläjärvi wrote:
>
> It is more elegant in perl, but dhclient-enter-hooks is a
> shellscript, so it felt easier to just add it there.
/etc/dhclient-enter-hooks needs to be created in any case if you wish to
use named else it will write an /etc/resolv.conf containing the values
given by the DHCP server. Something like this is all it takes to keep
it from changing your resolv.conf:
#!/bin/sh
make_resolv_conf() {
}
Naturally, one could expand my null'ed make_resolv_conf() to 1) verify
DNS servers have changed, and 2) write them in /etc/namedb/named.conf,
then 3) "ndc restart"
My ISP has done something in the past year or so that dhclient thinks
each and every lease renewal is practically a new lease.
/etc/resolv.conf gets (actually, only "attempted" now) written on each
renewal. /var/log/messages gets flooded with this:
Mar 8 21:14:29 grumpy dhclient: New Network Number: 24.214.34.0
Mar 8 21:14:29 grumpy dhclient: New Broadcast Address: 24.214.34.255
--
David Kelly N4HHE, dkelly@hiwaay.net
=====================================================================
The human mind ordinarily operates at only ten percent of its
capacity -- the rest is overhead for the operating system.
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