dotDefender is a software based web application firewall. dotDefender complements the network firewall and other network-based internet security products by intercepting seemingly legitimate users attempting to use the web application to commit fraud, or gain access to valuable and confidential information.
dotDefender uses a number of engines to detect and prevent hacking attacks, including Pattern Recognition, a Signature Knowledgebase, Data Leakage Protection (DLP), and Upload Inspection.