Firewall-Friendly Web Sites

Installing a firewall is a security measure, but it’s just the first step. To maintain your security and your firewall, you have to stay vigilant. The links in the following list are to Web sites that can help you stay on top of Internet security issues:

• CERT: Studies Internet vulnerabilities and posts security advisories on discovered security threats

• Information System Security: A security portal with news and forums

• Internet Assigned Numbers Authority: Shows a comprehensive listing of protocol port numbers

• SANS: Offers many security-related resources, including training

• SecurityFocus: Gives the latest information on security vulnerabilities