The
Ultimate
Business Machine

Technology, business
and innovation.

And, not least, about
the Mac.

Weblog • Archive • Cutedge

by: Bernard Teo








Creative Commons License

Copyright © 2003-2012
Bernard Teo
Some Rights Reserved.

Sun 28 Aug 2005

DNS Enabler and Slave Name Servers

Category : Technology/slaveNameServer.txt

I'm almost done with this. This is DNS Enabler setting up a slave (secondary) name server :

Everything works exactly the same as before except that the radio button allows you to indicate that this is going to be a back-up (slave) name server that reads its zone data from a primary (master) name server.

Hit the Run DNS button and this slave will keep itself synchronised with the master, updating its zone data files whenever the master changes.

Neat. If your primary name server goes down, there's still this backup.

Except that the slave saves the zone data in the "shortened" $ORIGIN format, below, and I've been using the "long" (probably archaic) format up to now.

So I've had to re-write a large chunk of code to parse the data in this $ORIGIN alternate format. I decided I might as well as standardise on this one format when I'm writing out the zone files for the primary name server. That's why it's taking a little bit longer than I thought. But it's better for the long run.

I can't wait to get this over with to get back to Postfix Enabler Part 2 (or whatever it's going to be called).

Next week, we'll also have the SQLite/Objective-C version of Luca ready. (Luca rhymes with lucre. Apt for an accounting system? Hopefully not in a pejorative way.)

It's only 1/8th the size of the current Java/MySQL-based version, yet with all of the same features. In fact, it may work even better. Is Objective-C more productive than Java? I'm starting to believe this is so.

DNS, Web, Mail, and an accounting/financial management system that integrates with all these. They form the foundation of every modern-day business system. We're going to make the Mac the ultimate business machine by the time we're through. Or die trying? In any case, it won't be for want of trying.

Posted at 2:14PM UTC | permalink

Mac@Work
Put your Mac to Work

• Sivasothi.com? Now how would you do something like that?
• Weblogs. Download and start a weblog of your own.
• A Mac Business Toolbox
A survey of the possibilities
• A Business Scenario
How we could use Macs in businesses
• VPN Enabler for Mavericks
• MailServe for Mavericks
• DNS Enabler for Mavericks
• DNS Agent for Mavericks
• WebMon for Mavericks
• Luca for Mavericks
• Liya for Mountain Lion & Mavericks
• Postfix Enabler for Tiger and Panther
• Sendmail Enabler for Jaguar

Services running on this server, a Mac Mini running Mac OS X 10.9.2 Mavericks:

  • Apache 2 Web Server
  • Postfix Mail Server
  • Dovecot IMAP Server
  • Fetchmail
  • SpamBayes Spam Filter
  • Procmail
  • BIND DNS Server
  • DNS Agent
  • WebDAV Server
  • VPN Server
  • PHP-based weblog
  • MySQL database
  • PostgreSQL database

all set up using MailServe, WebMon, DNS Enabler, DNS Agent, VPN Enabler, Liya and our SQL installers, all on Mavericks.