Tempesta FW is an open source firewall and framework for HTTP DDoS mitigation and web application firewall capabilities. It functions at layers 3 through 7 and directly embeds into the Linux TCP/IP stack. As a hybrid of an HTTP accelerator and firewall, it aims to accelerate content delivery to mitigate DDoS attacks while filtering requests. This allows it to more effectively mitigate application layer DDoS attacks compared to other solutions like deep packet inspection or traditional firewalls and HTTP servers.