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UNCLASSIFIED Additional Resources  Version 1.0g  UNCLASSIFIED 239   9.3.  Tool References The list below describes some well-respected non-commercial tools that may be helpful in router adminstration and improving network security. Nmap http://www.insecure.org/nmap/ http://www.eeye.com/html/Databases/Software/nmapnt.html This is the most widely used port-scanning tool for Linux and Unix systems. A version is also available for Windows NT. TeraTerm Pro http://hp.vector.co.jp/authors/VA002416/teraterm.html TeraTerm is a wonderful terminal emulator and telnet application for Windows operating systems.  It makes a most effective Cisco router console application. Minicom http://www.pp.clinet.fi/~walker/minicom.html Minicom is a small, effective terminal emulation tool for Linux and Unix.   While it has no fancy GUI, minicom is fast, efficient, flexible, and will serve well as a Cisco router console application on Linux.   SATAN http://www.fish.com/~zen/satan/satan.html The Security Administrator’s Tool for Analyzing Networks (SATAN) is primarily oriented toward network security assessment of traditional host computers, but it can also identify security vulnerabilities of routers and the network boundary protection they provide. SAINT http://www.wwdsi.com/saint/index.html The Security Administrator’s Integrated Network Tool (SAINT) is an advanced derivative of SATAN.  It can provide valuable security scanning services for hosts, routers, and networks. Ethereal http://ethereal.zing.org/ Ethereal is a very effective network traffic capture and analysis tool.  Tools like Ethereal are valuable for diagnosing and testing router and network security.