Jared

Bind, Resolvconf and Dynamic Updates on Ubuntu Hardy

Jared Bellows — Thu, 03 Sep 2009 05:53:47 +0000

This last week I setup a DNS server for a project at work. I have done it before but there were a couple nuances to where the zone file should be stored and how to have forwarders set by resolvconf on Hardy (8.04).

First, where to put the zone files. The default install of 8.04 has apparmor installed which restricts where the named process can write to. In the comments of /etc/apparmor.d/usr.sbin/named it notes that /var/lib/bind as the location for dynamically updated zone files. That is simple to do but is not well documented.

Lastly, using resolvconf to set the forwarders option dynamically based on the DNS servers received via DHCP. Getting this set is important as having the DNS server perform the recursive lookups on the root servers can take a long time. Being able to forward saves quite a bit of time in resolving many addresses. The first thing to do is to install resolvconf if not already installed. Once it is installed then the only thing left is to change /etc/bind/named.conf to include /var/run/bind/named.options instead of including /etc/bind/named.conf.options. The options file in /var/run/bind is actually derived from the /etc/bin/named.conf.options. That means that any options you wish to add should be placed in the /etc/bind/named.conf.options file and not in the /var/run/bin/named.options file.

This is pretty basic but documentation is very lacking. I hope in the future that better documentation is made available.

POTW: April 13 – 19, 2009

Mon, 20 Apr 2009 17:38:39 +0000

Canon Digital Rebel XTi
Canon EF 50mm F/1.8 II
ISO 100
1/6 seconds, F/5.6

POTW: April 06 – 12, 2009

Mon, 13 Apr 2009 06:45:16 +0000

Canon Digital Rebel XTi
Sigma 55-200mm F4-5.6 DC
ISO 100
1.6 seconds, F/8

My second attempt at doing the heart shadow from a ring shot. Learned some things but still not quite where I want it to be.

POTW: March 29 – April 04, 2009

Tue, 07 Apr 2009 05:10:55 +0000

Canon Digital Rebel XTi
Canon EF-S 18-55mm F/3.5-5.6
ISO 100
1/60 seconds, F/5.6

The boys getting ready to take a drive.

POTW: March 22 – 28, 2009

Mon, 30 Mar 2009 04:11:51 +0000

Canon Digital Rebel XTi
Canon EF 50mm F/1.8 II
ISO 400
1/160 seconds, F/3.2

A two year old is hard to photograph. Much easier when the subject cannot move (as the POTW from last week showed me.)

POTW: March 15 – 21, 2009

Sun, 22 Mar 2009 01:26:18 +0000

Canon Digital Rebel XTi
Canon EF 50mm F/1.8 II
ISO 400
1/320 seconds, F/5.6

Took some portraits of Seth in celebration of him turning 4 months old.

POTW: March 8 – 14, 2009

Sun, 15 Mar 2009 06:31:59 +0000

Canon Digital Rebel XTi
Sigma 55-200mm F4-5.6 DC
ISO 1600
1/80 seconds, F/5

POTW: March 1 – 7, 2009

Sun, 08 Mar 2009 06:39:40 +0000

Canon Digital Rebel XTi
Sigma 55-200mm F4-5.6 DC
ISO 100
5 seconds, F/32

This idea can be found all over but it was late and I was out of ideas so I tried it out.

Provo Temple in HDR

Mon, 02 Mar 2009 06:58:04 +0000

This image is an HDR image composed of 5 exposures. Using Photomatix to generate the HDR than Photoshop to make final touches. This was a first real experiment for me in doing HDR photography. I think it turned out as I had hoped as I am now able to see the details that were present across all 5 exposures.

POTW: February 22 – 28, 2009

Sun, 01 Mar 2009 07:52:21 +0000

Canon Digital Rebel XTi
Canon EF-S 18-55mm F/3.5-5.6
ISO 100
10 seconds, F/8

Bell Tower at BYU.