Linux Server Security, Second Edition

This is the Title of the Book, eMatter Edition

Copyright © 2007 O’Reilly & Associates, Inc. All rights reserved.

djbdns

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Coexisting with BIND

You may decide to install some components of djbdns on your servers to handle

name-service duties. By choice or necessity, you may need to share these duties with

an existing BIND installation. This section describes how to exchange zone data

between nameservers running djbdns and BIND.

Installing ucspi-tcp

You first need to install a small external toolkit, also written by Bernstein, called

ucspi-tcp. This contains the tcpserver and tcpclient programs. Similar to inetd, they

manage external access to TCP-based clients and servers, but they do so more reli-

ably due to better load and resource controls. Follow these steps to install ucspi-tcp:

1. Using wget (or the HTTP tool of your choice), download the latest tarball from

http://cr.yp.to/ucspi-tcp/install.html:

$ wget http://cr.yp.to/ucspi-tcp/ucspi-tcp-0.88.tar.gz

2. Extract:

$ tar xvzf ucspi-tcp-0.88.tar.gz

3. Fix errno.h, if needed:

$ cd ucspi-tcp.0.88

$ vi error.h

Change:

extern int errno;

to:

#include <errno.h>

dnsmx dnsmx fqdn Print the MX record for fqdn.

dnstxt

dnstxt fqdn Print the TXT record for fqdn.

dnsq

dnsq type fqdn server Send a nonrecursive query to server for records of type type

for fqdn.

dnsqr

dnsqr type fqdn Get records of type type for fqdn. This sends a recursive query

to the nameserver specified ...