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authorTheo de Raadt <deraadt@cvs.openbsd.org>1996-09-05 08:55:44 +0000
committerTheo de Raadt <deraadt@cvs.openbsd.org>1996-09-05 08:55:44 +0000
commit74ce25b78fd53d753084ef14b2234bc105a4a983 (patch)
tree2cffc06e2eb76342240043e73120bb5451145124 /usr.bin/nc/netcat.blurb
parente70074aa65073a222e5a14ec65e7c499c313ba3d (diff)
nc is *hobbit*'s netcat; let the sysadm have the same tools the crackers
have, so that he may learn what the network is about and protect it better.
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+Netcat 1.10 is an updated release of Netcat, a simple Unix utility which reads
+and writes data across network connections using TCP or UDP protocol. It is
+designed to be a reliable "back-end" tool that can be used directly or easily
+driven by other programs and scripts. At the same time it is a feature-rich
+network debugging and exploration tool, since it can create almost any kind of
+connection you would need and has several interesting built-in capabilities.
+
+Some of netcat's major features are:
+
+ Outbound or inbound connections, TCP or UDP, to or from any ports
+ Full DNS forward/reverse checking, with appropriate warnings
+ Ability to use any local source port
+ Ability to use any locally-configured network source address
+ Built-in port-scanning capabilities, with randomizer
+ Built-in loose source-routing capability
+ Can read command line arguments from standard input
+ Slow-send mode, one line every N seconds
+ Hex dump of transmitted and received data
+ Optional ability to let another program service established connections
+ Optional telnet-options responder
+
+A very short list of potential uses:
+
+ Script backends
+ Scanning ports and inventorying services, automated probes
+ Backup handlers
+ File transfers
+ Server testing, simulation, debugging, and hijacking
+ Firewall testing
+ Proxy gatewaying
+ Network performance testing
+ Address spoofing tests
+ Protecting X servers
+ 1001 other uses you'll likely come up with
+
+Changes between the 1.00 release and this release:
+
+ Better portability -- updated generic.h and Makefile [thanx folks!]
+ Indication of local-end interface address on inbound connections
+ That's *Dave* Borman's telnet, not Paul Borman...
+ Better indication of DNS errors
+ Total byte counts printed if -v -v is used
+ A bunch of front-end driver companion programs and scripts
+ Better handling of stdin arguments-plus-data
+ Hex-dump feature
+ Telnet responder
+ Program exec works inbound or outbound now
+
+Netcat and the associated package is a product of Avian Research, and is freely
+available in full source form with no restrictions save an obligation to give
+credit where due. Get it via anonymous FTP at avian.org:/src/hacks/nc110.tgz
+which is a gzipped tar file and not to be confused with its version 1.00
+precursor, nc100.tgz. Other distribution formats can be accomodated upon
+request. Netcat is also mirrored at the following [faster] sites:
+
+ zippy.telcom.arizona.edu:/pub/mirrors/avian.org/hacks/nc110.tgz
+ ftp.sterling.com:/mirrors/avian.org/src/hacks/nc110.tgz
+ coast.cs.purdue.edu:/pub/tools/unix/netcat/nc110.tgz
+ ftp.rge.com:/pub/security/coast/mirrors/avian.org/netcat/nc110.tgz
+
+_H* 960320