1) Packet filtering technology. This modern technology can total the stateful assessment from the firewall, thereby pre-determining the policy of street address,​network security firewall  ， port and provider street address, and also the firewall must intercept by analyzing all information.

2) Encryption technological innovation. By means of encryption technologies, the relevant employees can effectively encrypt the transmitted info, and also the information and facts password is perfected from the info exchange employees.

3) Antivirus technology. Firewalls have antivirus capabilities. In the effective use of anti-computer virus modern technology, it mainly consists of virus elimination, elimination and recognition.

4) Proxy web server. In line with the network operations mode of the laptop or computer, the corresponding proxy web server may be create from the firewall technological innovation, and also the info can be exchanged throughout the proxy hosting server.