CERT/CC is a center that specializes in Internet security issues at Carnegie Mellon’s Software Engineering Institute. At its Web site, you’ll find information about Internet vulnerabilities, security alerts, and information about fixing vulnerabilities.

FIRST is an international coalition formed to share information about network security threats and to work out responses to incidents. You can sign up for mailing lists and become a member. The annual membership fee is $550.00. FIRST holds an annual forum to discuss security issues.

SecurityFocus is a collection of security-related mailing lists. You can subscribe to the newsletter, which offers information about exploits, vulnerabilities, and threats, and you can take advantage of the mailing list to solicit information from members.

SANS ia an organization that develops, maintains and makes available at no cost, the largest collection of research documents about various aspects of information security.

The CSRC is the Web site for the Computer Security Division (CSD) of the NIST's Information Technology Laboratory. The CSD’s mission is to research and raise awareness of new IT vulnerabilities and to develop cost-effective security measures.

Microsoft’s Web site offers important tips and other information to help you secure your network. In addition to valuable information, Microsoft provides security services.

The U.S. Department of Energy’s CIAC Web site offers news about new computer threats, hoaxes, and vulnerabilities, along with procedures for reporting incidents such as network attacks.

ISSA is an international organization of IT security professionals established to educate its members about security issues and measures and to publish the findings of its forums on security-related issues.