From German Web Security:
By using Web Scan Service, Web site admins and IT-professionals can see whether their Web sites are hackable or vulnerable to attacks. Web Scan Service gives you the opportunity of auditing your Web sites as they are audited by external hackers on your behalf. This suite provides a fully featured web security scanner, crawler, report analysis tool, Web security explanations and an extensive database of security checks for all leading Web server platforms. Instead of manually searching for security defects, which is very hard, Web site admins and IT-professionals trust Web Scan Service to detect security defects and vulnerabilities automatically. German-WebSecurity offers free scans with Web scan service after the registration.