January 2005
Intermediate to advanced
544 pages
23h 44m
English
Content preview from Linux Server Security, Second Edition
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djbdns
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195
What Is djbdns?
BIND can be considered the nuclear-powered kitchen sink, blender, and floor pol-
isher of DNS software. It gurgles busily in the corner and occasionally springs a leak
or explodes. Despite its market share, it’s an old machine with spotty maintenance
records.
djbdns, then, is the set of tools that you’d find at a DNS specialty store: simple,
secure, fast, and safe when used as directed. Almost unnoticed, this package serves
millions of domain names every day at large Internet domain-hosting companies
and other busy sites, such as DirectNIC, NameZero, Interland, and TicketMaster.
You may be surprised to learn that tinydns (the public nameserver component of
djbdns) is the second most used nameserver on the Internet. A 2002 survey of 22
million .com domains (http://cr.yp.to/surveys/dns1.html) showed that 70% were
served by BIND, and 8% by tinydns. A 2004 survey of almost 38 million domains
(http://mydbs.bboy.net/survey/), which included .com,.net,.org,.info,and.biz
domains, showed a 15.5% share for tinydns. On average, tinydns handled more
domains per server (446) than BIND (72) or Microsoft DNS Server (21).The soft-
ware is very reliable. It just keeps running without human intervention, other than
to modify domain data. Memory use is limited, processes are
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.