January 2005
Intermediate to advanced
544 pages
23h 44m
English
Content preview from Linux Server Security, Second Edition
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,
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.
This is the Title of the Book, eMatter Edition
Copyright © 2007 O’Reilly & Associates, Inc. All rights reserved.
djbdns
|
211
Installing axfrdns
axfrdns uses TCP port 53, so it can share an IP with tinydns, which uses UDP port
53. Assuming you’ll use the IP 192.193.194.195, follow these steps:
1. Create the service directory:
# axfrdns-conf axfrdns dnslog /etc/axfrdns /etc/tinydns 192.193.194.195
# cd /etc/axfrdns
2. Edit the tcp file to allow zone transfers from 200.201.202.203 for hackenbush.
com and its reverse:
200.201.202.203:allow,AXFR="hackenbush.com,194.193.192.in-addr.arpa"
3. Get tcp into a binary format:
# make
4. Tell daemontools about the service:
# ln -s /etc/axfrdns /service
Running axfrdns
The secondary server will request a zone transfer from axfrdns when the TTL of the
zone’s SOA record expires. axfrdns will serve the zone from the same authoritative
database used by tinydns: data.cdb. You can also cause the secondary server to
request a zone transfer immediately by sending it a notify message. Although not a
part of standard djbdns, the Perl script tinydns-notify (available online at http://www.
sericyb.com.au/tinydns-notify) can be used for this.
axfrdns only responds to AXFR requests, and it transfers whole zones. If an external
nameserver like BIND makes an IXFR request to axfrdns, it will fail. RFC 1995 says
the requester should then try AXFR (RFC 1995), but a bug in some versions ...
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.