What are the main parts of common network security systems?

Large and complex networks must have a comprehensive network security system.

First of all, firewall technology

Install firewall, packet filtering and ip camouflage on the gateway to monitor the communication inside and outside the network.

Second, user authentication technology.

Different users have different rights. Check regularly.

Thirdly, intrusion detection technology.

Fourth, password management.

Each user sets a password and defines the validity period of the password. Simple numbers, English, etc. Is not allowed.

Verb (abbreviation of verb) virus protection

Establish a virus firewall, install anti-virus software, and kill servers and terminals in time; Restrict * * * to enjoy the directory and read and write permissions; Restrict online downloading and use of pirated software;

Six, system management

Patch the system in time; Regularly evaluate the security of the server and fix vulnerabilities; Booting from floppy disk or CD is prohibited; Set the power-on password (in cmos); Set the password of the screen saver; Ntt system uses ntfs format; Delete unused accounts;

Seven, hardware management

Eight, agency technology

Use a proxy server behind the router and two network cards, one built-in and one external, to establish physical isolation and hide the intranet ip.

Nine, the system adopts dual-computer redundancy and disk display technology.