Certifications:
- http://comptia.org/certification/security/default.aspx (Security+)
- http://www.giac.org/certifications/security/gsec.php (GSEC)
- http://www.giac.org/certifications/security/gcia.php (GCIA)
- https://www.isc2.org (CISSP)

News & Alerts:
- http://isc.sans.org (Internet Storm Center)
- http://www.cert.org (CERT Coordination Center)
- http://www.first.org (Forum of Incident Response and Security Teams)
- http://www.blackhat.com (Digital self defense)
- http://www.defcon.org (Conferences and forums)
- http://csrc.nist.gov (Computer Security Resource Center at NIST)
- http://informationsecurity.techtarget.com (Information Security Magazine news)
- http://www.securityfocus.com (Latest Bugs and Vulnerabilities)
- http://www.linuxsecurity.com (Linux & Open source news)
- http://www.whitehouse.gov/infocus/homeland (Homeland security)
- http://www.voipsa.org (VoIP security)

Vendors and Products:
- http://www.iss.net (ISS)
- http://www.mcafee.com (McAfee)
- http://www.pointsec.com (Pointsec)
- http://www.juniper.net (Juniper)
- http://www.checkpoint.com (Checkpoint)
- http://www.cisco.com (Cisco)
- http://www.symantec.com (Symantec)
- http://www.microsoft.com/security/default.mspx (Microsoft)
- http://www.rsasecurity.com/rsalabs (Vendor – RSA)
- http://www.credentica.com (Solutions for Identity & Access Management)