Making Manual Edits to Dynamic DNS Zones7 September 2010
This is one of those posts that is as much for my own benefit as it is for others. For a few weeks now, I’ve been working on a dynamic DNS setup for my home/home office network involving BIND and the ISC DHCP daemon running on a pair of OpenBSD virtual machines. I finally got it to work (thanks in no small part to this article and this how-to post) and then found that I needed to make some manual edits to the DNS zones.
After a great deal of stumbling and fumbling, I found an obscure reference to a need to use
rndc when making manual edits. After some testing, I learned that the “correct” way to make manual edits is as follows:
Halt changes to the dynamic DNS zone with the command
rndc freeze <zone name>.
Make the manual edits to the zone file, being sure to increment the zone serial number.
Use the command
named-checkzone <zone name> <zone file>to verify the syntax in the zone file.
Allow changes to the dynamic DNS zone with the command
rndc thaw <zone name>.
If you monitor the appropriate log files (on my system I had to monitor
/var/log/daemon), you’ll see zone transfers take place to any secondary name servers, a strong indicator that the change has successfully been accepted and propagated.
A very simple task, I know, but hopefully this post will help me next time I need to do this same task again and hopefully it will help someone else out there in the same situation.Tags: BSD · Networking · UNIX Previous Post: VMworld 2010 General Session, Day 4 Next Post: vSphere 4.1 Links