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Unix System Administration Handbook 1997 October
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INDEX ENTRY FOR TCPD:
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Name: TCPD - Controls Internet service requests
Version: 7.6
Author(s): Wietse Venema <wietse@wzv.win.tue.nl>
Wietse Venema (wietse@wzv.win.tue.nl)
Department of Mathematics and Computing Science
Eindhoven University of Technology
P.O. Box 513
5600 MB Eindhoven
The Netherlands
On the CD-ROM in: security/tcpd.tar
Ftp source: ftp.win.tue.nl:/pub/security/tcp_wrapper*
Size on the CD: 113 KB (compressed)
Description:
With this package you can monitor and filter incoming requests for the
SYSTAT, FINGER, FTP, TELNET, RLOGIN, RSH, EXEC, TFTP, TALK, and other
network services.
It supports both 4.3BSD-style sockets and System V.4-style TLI. Praise
yourself lucky if you don't know what that means.
The package provides tiny daemon wrapper programs that can be installed
without any changes to existing software or to existing configuration
files. The wrappers report the name of the remote host and of the
requested service; the wrappers do not exchange information with the
remote client process, and impose no overhead on the actual
communication between the client and server applications.
Optional features are: access control to restrict what systems can
connect to your network daemons; remote user name lookups with the RFC
931 protocol; additional protection against hosts that pretend to have
someone elses host name; additional protection against hosts that
pretend to have someone elses host address.
-- Quoted from README by Wietse Venema in the tcp_wrapper 6.3
distribution.
Advertised architectures:
Early versions of the programs were tested with Ultrix >= 2.2, with
SunOS >= 3.4 and ISC 2.2. Later versions have been installed on a wide
variety of platforms such as SunOS 4.x and 5.x, Ultrix 3.x and 4.x, DEC
OSF/1 T1.2-2, HP-UX 8.x, AIX 3.1.5 up to 3.2.4, Apollo SR10.3.5, Sony,
NeXT, SCO UNIX, DG/UX, Cray, Dynix, and an unknown number of other ones.
-- Quoted from README by Wietse Venema in the tcp_wrapper 6.3
distribution.
Prerequisites:
Requirements are that the network daemons are spawned by a super server
such as the inetd; a 4.3BSD-style socket programming interface and/or
System V.4-style TLI programming interface; and the availability of a
syslog(3) library and of a syslogd(8) daemon. The wrappers should run
without modification on any system that satisfies these requirements.
Workarounds have been implemented for several common bugs in systems
software.
-- Quoted from README by Wietse Venema in the tcp_wrapper 6.3
distribution.