November 2007
Beginner
642 pages
15h 43m
English
Content preview from Linux Networking CookbookBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.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.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.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.
19.13. Troubleshooting DNS Clients
Problem
Configuring DNS involves a number of seemingly random configuration files on Linux. What do you need to look for to make sure client configurations are good?
Solution
DHCP clients on Debian need only entries in /etc/network/interfaces. Don't edit /etc/resolv.conf. You may enter important hosts in /etc/hosts as a fallback in case your DNS server goes down; just be careful to get it right because /etc/hosts takes precedence over your DNS server.
On Fedora, each interface has its own configuration file, /etc/sysconfig/network-scripts/ifcfg-*. Again, don't edit /etc/resolv.conf for DHCP clients, and you may use /etc/hosts as a fallback.
Statically configured interfaces must have nameservers configured in /etc/resolv.conf, and the correct gateway in the interface configuration file. You may use /etc/hosts as a fallback.
On Windows and Mac clients, the same principles apply: don't configure conflicting static information on DHCP clients, and on statically configured clients, make sure you manually configure the correct gateway and DNS servers. And, just like Linux DHCP clients, you can serve up everything from your DHCP server.
Discussion
Make it easy on yourself—use your DHCP server to assign dynamic and static addresses, provide addresses for your network gateway and servers, and assign static routes. Then, the only client configuration you need is the usual DHCP configuration.
See Also
Chapter 4 has several recipes on configuring DHCP and DNS with Dnsmasq ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.