Web services start-up Layer 7 Technologies introduced its first products on Tuesday. The company's SecureSpan line includes a network gateway and software to enforce security policies for applications that are written around Web services standards. SecureSpan aims to give network administrators rather than software programmers responsibility for security. It is designed to provide a central place to manage security policies, allowing users to make changes more quickly and to reduce errors, according to company executives. Typical installations of SecureSpan begin at about $100,000.