Explanation
Stateful Inspection and Proxies are two different technologies for implementing firewall security. Stateful Inspection is a technique that inspects packets at the network layer and maintains a state table that tracks the status of each connection. Proxies are applications that act as intermediaries between clients and servers, and inspect packets at the application layer. The competition between stateful inspection and proxies was based on performance, protocol support, and security. When it comes to performance, stateful inspection was significantly faster than proxies, because it did not have to process the payload of each packet and could handle more concurrent connections1. References: Check Point R81 Security Gateway Technical Administration Guide