Security Related

SecurityFocus (http://www.securityfocus.com): Home of the BugTraq archives; security consulting services; links to security/hacking news from around the Web (updated continuously); and fine, original articles by Kevin Poulsen and guest contributors (including El Reg's own, by virtue of a content sharing agreement).

Security News Network (http://www.atstake.com/security_news) (formerly Hacker News Network): Links to security/hacking news (updated daily); original research leading to periodic embarrassments for SW vendors; security consulting services.

PacketStorm (http://packetstorm.securify.com): Links to selected security news (updated periodically); free security tools; live exploit code (for research purposes only, please); discussion forums and a vast archive.

CERT (http://www.cert.org): Computer Emergency Response Team at Carnegie Mellon Uni; one of the largest archives of virus reports, exploits, bugs, advisories and network-administrative worst practices on the Web.

Cryptome (http://cryptome.org): Cryptography and surveillance news and documents; government shenanigans involving crypto, surveillance and related technology.

SecurityPortal (http://www.securityportal.com): News links; advisories; original articles; security services and a nice crypto section.

SecuriTeam (http://www.securiteam.com): Portal with news; exploits and tools; product reviews; and separate focus areas for UNIX and Win-NT/2K.

Whitehats (http://www.whitehats.com): Tools; forums; bug reports; news links; and original research articles.

Hacking Related

Hackerz Hideout (http://hackersclub.com/km/frontpage): Big educational site with hacking tutorials covering use of viruses and Trojans, network clients and IP architecture; holes, bugs and their related exploits; a zine archive; and a vast archive of toolz, appz and sploits.

Attrition.org (http://www.attrition.org): Big site with news links; advisories; essays; a crypto archive; and an immense archive of defaced Web pages.

IceFortress (http://www.icefortress.com): Educational site with all the basic toolz and appz; challenges and games; and forums with extremely patient admins willing to enlighten even the most clueless newbie.

Ksoze's Cracking Workshop (http://www.deny.de/kz): Tips, tricks and original source code for advanced crackers.

AntiOffline (http://www.antioffline.com): Irreverent, satirical zine devoted to hacking news; original articles; and spoofed Web pages.

Fravia+ (http://www.searchlores.org/basic.htm): Very original site devoted to searching/penetrating the Net with creativity.

Deny.de (http://deny.de/): Educational portal with news; appz; toolz; and forums with patient, helpful admins.

SamSpade (http://samspade.org): Heaps of useful CGI gateways.

Mixter Security (http://members.tripod.com/mixtersecurity/evil.html): CGI gateways; and security self-tests.

CyberArmy (http://www.cyberarmy.com): Big site with appz, toolz, tutorials; a hacking-related search engine; and challenges and games.