December 2000
Intermediate to advanced
800 pages
22h 41m
English
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How TCP Wrappers Work
The TCP wrappers program is called in place of the actual service that it is to protect. There are two different methods for implementing TCP wrappers. The first is to simply replace the actual program with tcpd (the TCP wrappers daemon). Because this is a rather limited usage, and because the second method is more flexible, this chapter looks exclusively at the second implementation method—to have either the inetd metadaemon call tcpd for every invocation of a daemon, or to use tcpd within the /etc/hosts.allow file for certain patterns.
Some of the functionality of TCP wrappers is based on compile-time options. If you desire or require any of this functionality that is not built by default, you'll need to recompile, and ...
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