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.

Free Internet based security scanner site that will provide a report on what personal information is available to hackers over ones Internet connection.

Consulting firm offering penetration testing and vulnerability audit services.

Free Nmap port scan. An internet server vulnerability assessment and a web server vulnerability assessment are also available.

Provides a self-managed scanning solution to identify and help defend against vulnerabilities.

Performs security audits on wired or wireless networks.

Offers web server scanning services.

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

An automated information security and threat vulnerability assessment service.

Provider of security and vulnerability assessment solutions.