Date: Fri, 16 Aug 1996 12:48:35 -0600 (MDT) From: Nate Williams <nate@mt.sri.com> To: Thomas David Rivers <ponds!rivers@dg-rtp.dg.com> Cc: imb@asstdc.com.au, hackers@freefall.freebsd.org Subject: Re: Problem in 2.1.5 install and loopback interface. Message-ID: <199608161848.MAA07518@rocky.mt.sri.com> In-Reply-To: <199608161802.OAA04416@lakes.water.net> References: <199608161802.OAA04416@lakes.water.net>
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[
Your mailer is destroying email addresses. I'm not even sure if I can
send to you directly, and I have to edit the To and Cc lines to avoid
bounces.
]
> Hmmm, let me restate this then...
>
> That is, if you are a nameserver, and you are also a name client
> (i.e. you have an /etc/resolv.conf) you should use the IP address
> when configuring your interfaces, since you:
>
> 1) Are a client so /etc/hosts isn't examined until after
> a _long_ time out.
Unless you tell it to use /etc/hosts first. Look at /etc/host.conf.
> 2) Are the server the client needs to contact and
> named isn't running yet.
See #1.
> I see that the man page says:
>
> When using the name server named(8), this file provides a backup when
> the name server is not running. For the name server, it is suggested
> that only a few addresses be included in this file. These include ad-
> dress for the local interfaces that ifconfig(8) needs at boot time and a
> few machines on the local network.
>
> It's not that it won't work, it's just that we have to wait for
> a long time for the gethostbyname() request to time out before
> proceeding... if we used 127.0.0.1 we can avoid that wait...
True. In any case, on my nameserver box I use *only* IP addresses for
configuration, since it avoids lots of problems with the whole hosts
vs. nameserver issue.
> It was just a little spooky when I was setting up the nameserver,
> the machine would just sit there for awhile during boot-up
> and then proceed.
Modifying /etc/host.conf and putting in those names/addresses necessary
to boot your system should be adequate, but using IP addresses is a
better solution IMHO.
In my /etc/sysconfig on my DNS box, I add a field 'hostip' which is used
in place of 'hostname'.
# Set to the name of your host - this is pretty important!
hostname=ns.mt.sri.com
hostip=206.127.76.97
....
network_interfaces="lo0 ed0 ppp0"
ifconfig_lo0="inet localhost"
ifconfig_ed0="inet ${hostip} netmask 0xffffffe0"
Nate
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