Firewall Technology Strategy Analysis and Application Research

This paper first analyzes the network security evaluation method PDDR model, and makes an in-depth study of the firewall technology in the PDDR model, compares the characteristics of different firewalls, takes the stateful firewall as an example to analyze its workflow and security characteristics, and focuses on the key applications of dualchannel protocol, security zone policy, VPN technology, NAT technology and so on. Finally, the ENSP simulator simulates the configuration process of the firewall in the secure network, studies the application scenarios of the firewall in the network security, and provides reliable security technology methods for the protection of network information.