Mailinglist Archive: opensuse (5100 mails)

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RE: [SLE] SuSE Pro 9.1 - DNS and DHCP interaction - not quite
  • From: "Richard Mixon (qwest)" <rnmixon@xxxxxxxxx>
  • Date: Wed, 9 Jun 2004 18:55:45 -0700
  • Message-id: <DKELJBPNDHJEECCAEPGOOEFDGDAA.rnmixon@xxxxxxxxx>
I spoke too fast in my reply (see below).

> -----Original Message-----
> From: poeml@xxxxxxxx [mailto:poeml@xxxxxxxx]On Behalf Of
> poeml@xxxxxxxxxxx
> Sent: Wednesday, June 09, 2004 10:29 AM
> To: suse-linux-e@xxxxxxxx
> Subject: Re: [SLE] SuSE Pro 9.1 - DNS and DHCP interaction
> On Tue, Jun 08, 2004 at 11:40:10PM -0700, Richard Mixon (qwest) wrote:
> > I am a noobie when it comes to configuring DNS - some guidance is
> > appreciated.
> >
> > I am reading the DNS info in the 9.1 administration guide. It talks
> > about setting up zone files where one ends up hardcoding the IP
> > addresses for each hostname on the network. That seems to defeat the
> > purpose of DHCP though.
> No, that is a misunderstanding. You would in fact put IP addresses and
> their names into the zone files, but list _names_ only in the DHCP
> server configuration. (The DHCP server automatically does the necessary
> lookups.)
> Your dhcpd.conf doesn't need to list any (server) hostnames _at all_.
> The DNS zone files would be the primary repository of the name/address
> allocations.
> Nevertheless, to associate fixed hostnames to clients you still need to
> tell the DHCP server some identifier that is coupled to a name (usually
> MAC address), and you would need to add hostnames to the DNS zone
> manuall.
> That's where DDNS steps in: It reduces the administrative task to
> nothing but entering a hostname on the client -- the DHCP server will
> automatically update the DNS zone for you if that new client pops up.

OK, I've done my research on DDSN. But everything I read about DDNS indicates its only purpose it to let folks on the internet get
to your home website (or other IP server) using a hostname, even if your IP address is assigned and renewed using DHCP (i.e. you do
not have a static IP address).

I thought maybe DDNS is also a more generic feature of DNS servers. I looked through the BIND9 README and FAQ. I do see the mention
of dynamic updates, an "allow-updates" parm and something called TSIG. Is that the feature I want?

THANKS again - Richard

all I find, is about pointing your home/office to a DDNS provider
> That's pretty elegant and very efficient. No more editing of dhcpd.conf
> for host statements, and no more editing of zone files, and always a
> working and consistent installation.
> /usr/share/doc/packages/dhcp-server/DDNS-howto.txt
> > [...] I'm currently using a Linksys firewall
> > as a DHCP server for my Windows clients.
> >
> > I am setting up a SuSE Pro 9.1 server that will serve two main purposes:
> > - Samba file and print sharing;
> > - CVS source code server.
> >
> > We currently only have six users. I would really like to get rid of the host files that I have been using on each server and
> > workstation (servers Linus, workstations Windows 2000/XP). I think I need to setup a caching DNS server, plus 1 zone
> that identifies
> > my local network servers and workstations.
> Oh. Host files. You'll NEVER get them consistent. Really, get rid of
> them for good. :)
> > But as I said above, that seems like it defeats the purpose of DHCP. What am I missing.
> >
> > Thank you - Richard
> Peter

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