A security network primarily consists of three parts: The outer boundary, the internal boundary, and security devices.
Outer Boundary: The outer boundary is the outermost protective layer of the security network, mainly responsible for preventing malicious external attacks. It typically comprises various security devices such as firewalls, intrusion detection systems (IDS), and virtual private networks (VPNs).
Firewall: A firewall acts as a "filter" between the user network and external networks, identifying and blocking attacks from external networks to ensure the security of the user network.
**Intrusion Detection System (IDS):** An IDS monitors network traffic and logs in real time to promptly detect security vulnerabilities and malicious attacks, ensuring the security of the security network.
Virtual Private Network (VPN): A VPN uses cryptographic techniques to establish a tunnel between the user network and the public network, ensuring the confidentiality and security of data transmission.
Internal Boundary: The internal boundary is a core part of the security network, primarily responsible for restricting access and management permissions within the internal network. It typically consists of various security devices such as routers, switches, and network isolation devices.
Router: Routers restrict and manage access to the internal network, providing more granular access control.
Switches: Switches perform security checks and filtering on data packets within the internal network, ensuring the secure flow of information.
Network Isolation: Network isolation divides the internal network into different security zones, restricting access from the internal network to other zones and ensuring the security of the internal network.
Security Devices: Security devices are the equipment that actually play a security role in the security network. They mainly include intrusion detection systems (IDS), intrusion prevention systems (IPS), and encryption devices.
Intrusion Detection Systems (IDS): IDS use various technologies to monitor security vulnerabilities and malicious attacks in the network in real time, promptly detecting and alerting to ensure the security of the security network.
Intrusion Prevention Systems (IPS): IPS monitor network traffic and protocols in real time, identify malicious attacks, and defend against them, ensuring the reliability of the security network.
Encryption Devices: Encryption devices encrypt sensitive information, ensuring the confidentiality and security of information during transmission.