Dynamic dns updates through DHCP

Sylgeist · n00b Joined: 04 Dec 2002 Posts: 36 Location: USA

I have an interesting issue -

I was given aproval to install linux on a small server at my work for filesharing between people in my group. I have no control over the DHCP, DNS, etc for the company.

I can get an address from DHCP fine and access the network but apparently it is not updating the DNS server like the Windows clients do (they are W2k servers).

I have tried a lot of dhcp client options and the most I can get is this: (I have changed the name below)

Oct 14 10:11:07 test1dhclient: if IN A test1.mydomain.com rrset doesn't exist add 3600 IN A test1.mydomain.com 10.3.120.218 add 3600 IN TXT test1.mydomain.com "004edc959a896f92332c664927e1d09889": ran out of space.

Anyone know what's up?

labrador · Guru Joined: 04 Oct 2003 Posts: 316

Is this using a Dynamic DNS service or are you on an internal LAN?

If your set up relies on the DNS client to tell the DNS server what IP it got, that is something I've never seen done. Generally when you are running a server you want the IP address to be known to DNS, or else DHCP should have a mapping of your MAC address to an IP address so that it can be consistently assigned.

Without this, I'd think any machine could be plugged into your LAN and pretend to be one of your servers. I'd think that you should be able to request whatever solution is made available for other servers in your group. After all it isn't a client machine if it needs to be found on the network reliably.

Sylgeist · n00b Joined: 04 Dec 2002 Posts: 36 Location: USA

I am on the internal LAN - We have an active directory W2k server system that is DHCP,DNS, etc.

If a windows client hooks on to the network they get an IP and their host name is added to the DNS server. I am not able to get that to work with the linux box.

X · Posted: Tue Oct 14, 2003 6:33 pm Post subject:

Uncanny. I was just allowed to install gentoo on the machine where I work, and I'm having the same problem.

Basically, I can resolve my old hostname from when I used windows to the old ip address... but my new ip addresses after installing gnetoo aren't updating in the dns server... we use windows 2003 with active directory.

think4urs11 · Posted: Tue Oct 14, 2003 7:10 pm Post subject:

maybe this is somewhat useful...

http://www.mail-archive.com/linux-il@cs.huji.ac.il/msg28327.html

HTH
T.
_________________
Nothing is secure / Security is always a trade-off with usability / Do not assume anything / Trust no-one, nothing / Paranoia is your friend / Think for yourself

X · Posted: Tue Oct 14, 2003 7:39 pm Post subject:

think4urs11 · Posted: Tue Oct 14, 2003 8:02 pm Post subject:

Due to the fact M$ uses some draft/proposed extensions for DNS/DHCP the only chance you have then is to let your admins create the needed entrys (A + RR) manually.
AFAIK there is now way (yet) to do DDNS for non-M$ clients with that AD-integrated stuff.

If there is one - i'd like to have a solution too :roll:

HTH
T.
_________________
Nothing is secure / Security is always a trade-off with usability / Do not assume anything / Trust no-one, nothing / Paranoia is your friend / Think for yourself

Sylgeist · n00b Joined: 04 Dec 2002 Posts: 36 Location: USA

Thanks for the info everyone - I think i will try and get a static IP and manual dns entry.

Lightspeed · n00b Joined: 21 Feb 2003 Posts: 57 Location: UK

Perhaps you could ask to have the DHCP server configured to do the dynamic updating of addresses in DNS for those clients which don't do so themselves. Assuming the DHCP server is also an MS-based one, it will certainly be capable of this.

curtis119 · Posted: Sun Oct 19, 2003 4:51 am Post subject:

There is an option in MS dhcp server to do the DNS update for clients that don't support it directly. It has to be turned on by the admin (not on by default). It works great for Macs. Not sure with Linux though. Or you could get them to give your machine a static IP.
_________________
Gentoo: it's like wiping your ass with silk.

dma