Ubuntu home LAN server: Dynamic DNS & DHCP

Ok, I know I said in the last post that I was going to post these configs “later”. Well, it’s now 12 days later so I think it’s time to post them. Without further ado:

If you’re wondering “Why the hell didn’t he just put everything into a single named.conf file?”, I have a good reason. It’s Ubuntu’s fault! The BIND installation split the configs and I just stuck with that! Sure, I could just combine it all but I just went with the flow.

To help understand what some of the IP settings in the configs mean, here is my network setup:

Network: 192.168.10.0
Domain: home.lan
Server IP: 192.168.10.20 (DNS, DHCP & Domain Auth)
Router (Gateway) IP: 192.168.10.1
DHCP Range: 192.168.10.241 - 192.168.10.250
Dynamic DNS updates require the TSIG key (SecDNS). The DHCP server uses the key to authenticate with BIND and update the local network zones. Client updates are ignored.
The DNS server forwards unknown host request to OpenDNS.

I know it’s not “perfect” but it’s still being tweaked. See something I’m missing? Let me know in the comments!

I wish I would have gotten this posted sooner. Unfortunately, work has really picked up since the Chri….Winter Break. Things won’t be getting any better in February. That’s when my big project starts up. That project involves implementing the Cisco NAC in several schools. I can’t wait to get started on it because it will be a lot of fun learning how to operate it.

The urge to save humanity is almost always only a false-face for the urge to rule it. - H.L. Mencken

19.Jan.08 Linux, Networking

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One Response to “Ubuntu home LAN server: Dynamic DNS & DHCP”

Cody | January 19th, 2008 at 10:45 pm
I wrote a 15-page PDF about securing Linux (using Ubuntu 7.10 as my test machine). I wrote and presented the paper at my local Linux User Group a couple weeks ago. Here’s the link if you’re interested:

http://www.codyrester.com/hackproofinglinux.pdf