1、 Nessus http://www.nessus.org
2、 Netcat http://www.l0pht.com/~weld/netcat/
3、 Tcpdump http://www.tcpdump.org
4、 Snort http://www.snort.org
5、 Saint http://www.wwdsi.com/saint/
6、 Ethereal http://ethereal.zing.org/
7、 Whisker http://www.wiretrip.net/rfp/p/doc.asp?id=21&iface=2
8、 Internet Security Scanner http://www.iss.net
9、 Abacus Portsentry http://www.psionic.com/abacus/portsentry/
10、 Dsniff http://naughty.monkey.org/~dugsong/dsniff
11、 Tripwire http://www.tripwire.com/
12、 Cybercop http://www.pgp.com/asp_set/products/tns/ccscanner_intro.asp
13、 Hping2 http://www.kyuzz.org/antirez/hping/
14、 SARA http://www-arc.com/sara/
15、 Sniffit http://reptile.rug.ac.be/~coder/sniffit/sniffit.html
16、 SATAN http://www.fish.com/satan/
17、 IPFilter http://coombs.anu.edu.au/ipfilter
18、 iptables/netfilter/ipchains/ipfwadm http://netfilter.kernelnotes.org/
19、 Firewalk http://www.packetfactory.net/Projects/Firewalk/
20、 Strobe http://www.insecure.org/nmap/index.html#other
21、 L0pht Crack http://www.l0pht.com/l0phtcrack/
22、 John The Ripper http://www.openwall.com/john/
23、 Hunt http://www.cri.cz/kra/index.html#HUNT
24、 OpenSSH / SSH http://www.openssh.com/ http://www.ssh.com/commerce/index.html
25、 tcp wrappers ftp://ftp.porcupine.org/pub/security/index.html
26、 Ntop http://www.ntop.org
27、 traceroute/ping/telnet http://www.linux.com
28、 NAT (NetBIOS Auditing Tool) http://www.tux.org/pub/security/secnet/tools/nat10/
29、 scanlogd http://www.openwall.com/scanlogd/
30、 Sam Spade http://samspade.org/t/ http://www.samspade.org/
31、 NFR http://www.nfr.com
32、 logcheck http://www.psionic.com/abacus/logcheck/
33、 Perl http://www.perl.org
34、 Ngrep http://www.packetfactory.net/Projects/ngrep/
35、 Cheops http://www.marko.net/cheops/
36、 Vetescan http://www.self-evident.com/
37、 Retina http://www.eeye.com/html/Products/Retina.html
38、 Libnet http://www.packetfactory.net/libnet/
39、 Crack / Libcrack http://www.users.dircon.co.uk/~crypto/
40、 Cerberus Internet Scanner
http://www.cerberus-infosec.co.uk/cis.shtml
41、 Swatch http://www.stanford.edu/~atkins/swatch/
42、 OpenBSD http://www.openbsd.org
43、 Nemesis http://www.packetninja.net/nemesis/
44、 LSOF ftp://vic.cc.purdue.edu/pub/tools/unix/lsof/
45、 Lids http://www.turbolinux.com.cn/lids/
46、 IPTraf http://cebu.mozcom.com/riker/iptraf/
47、 IPLog http://ojnk.sourceforge.net/
48、 Fragrouter http://www.anzen.com/research/nidsbench/
49、 Queso http://www.apostols.org/projectz/queso/
50、 GPG/PGP http://www.gnupg.org/ http://www.pgp.com
