AJAX utility to test the port forwarding configuration on your router. The site shows your external IP address and has the ability to identify open ports on your connection.

Offers 'hacker free' website security certifications, in conjunction with the scanning services offered.

Offers assessment, analysis, firewall testing and port scan services for home and business users.

Offers an open source database of vulnerabilities.

Tests your exposure to a wide range of online threats.

Consulting firm offering penetration testing and vulnerability audit services.

Network auditing service.

Web based security services to detect and repair security vulnerabilities on multiple platforms. Internal and external security solutions, provides vulnerability assessment, and intrusion detection systems.

Independent provider of application security services.

An automated information security and threat vulnerability assessment service.