一些不错的国外linux安全站点

 http://www.megasecurity.org
http://www.k-otik.com/
http://www.derkeiler.com/
http://www.backtrace.de/
http://sourceforge.net/
http://lists.netsys.com/
http://www.blackhat.com/
http://www.phenoelit.de/
http://www.hbgary.com/
http://www.immunitysec.com/
http://www.foundstone.com/
http://www.nextgenss.com/
http://www.securiteam.com/
http://packetstormsecurity.org/
http://www.securityportal.com/
http://www.securityfocus.com/
http://www.atstake.com/
http://www.self-evident.com/
http://www.eeye.com/
http://www.insecure.org/
http://www.sans.org/
http://teso.scene.at/
http://www.sqlsecurity.com/
http://www.ussrback.com/
http://www.technotronic.com/
http://www.ntbugtraq.com/
http://defaced.alldas.de/
http://www.incident-response.org/
http://secinf.net/
http://whitehats.com/
http://www.securityflaw.com/bible/
http://lsd-pl.net/
http://mixter.void.ru/
http://www.thehackerschoice.com/
http://www.bugnet.com/
http://www.hackbbs.com/
http://phrack.org/
http://sysinternals.com/
http://project.honeynet.org/
http://www.s0ftpj.org/
http://www.wiretrip.net/
http://www.ietf.org/
http://www.whitecell.org/
http://www.vulnwatch.org/netcat/  Netcat
http://www.insecure.org           Nmap
http://winpcap.polito.it/         WinPcap
http://www.sysinternals.com/      PsTools
http://www.tamos.com/cv.htm       CommView 5.0 Build 452
http://www.oxid.it/   Cain & Abel