To improve the usability of developing and deploying WAF (Web Application Firewall) rules, we have proposed and developed a WebSiren which is a rule development tool which allows you to manage, search, analyze, translate and classify firewall rules. The developed application allow user to create new rules, edit existing rules and deleting specific rules from a rule set. It provides translation for mod security rules to Semantic rule representation and semantic rules to mod security rules. Rule Explorer also provides functionality to manage rule groups so that user can classify a certain set of rules into a group such as a user might want to manage a group of rules for XSS attacks. It also allow user to search a set of rules on the bases of specified criteria.