October 2000
Intermediate to advanced
1152 pages
26h 41m
English
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A Trivial Caching DNS
A normal Red Hat 7 installation includes a caching DNS implementation. Depending on the exact install method, and post-install configuration activities, this installation-default setup may have a flaw, making it excessively slow on any reverse DNS lookup (more on reverse DNS later in the Configuring DNS Server Master Zones section of this chapter). This problem can be verified by using telnet to access the newly installed machine. If this flaw exists, telnet will typically take 30 seconds or more to ask for the username and may time out entirely. Note that it's possible for slow telnet to be caused by flawed forward (name to number) resolution, although this is less common.
The following code contains the installation-default ...
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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.