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freebsd-ports/security/tcp_wrapper/pkg-descr

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This is the 7.4 version of the TCP/IP daemon wrapper package.
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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.
The package provides tiny daemon wrapper programs that can be installed
without any changes to existing software or to existing configuration
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files. The wrappers report the name of the client host and of the
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requested service; the wrappers do not exchange information with the
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client or server applications, and impose no overhead on the actual
conversation between the client and server applications.
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Optional features are: access control to restrict what systems can
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connect to what network daemons; client user name lookups with the RFC
931 etc. protocol; additional protection against hosts that pretend to
have someone elses host name; additional protection against hosts that
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pretend to have someone elses host address.
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