Firewalls act as a barrier between a trusted internal network and untrusted external networks (like the ). They filter incoming and outgoing network traffic based on a set of predefined rules, allowing or blocking data packets based on their source, destination, and content. Intrusion Detection Systems (IDS) and Intrusion Prevention Systems (IPS) are tools that monitor network traffic for suspicious or malicious activities. IDS detects and alerts administrators about potential threats, while IPS can actively block or prevent these threats from reaching the .
Implement strong access control mechanisms to ensure that only authorized users and devices can access network resources. This includes user , authorization, and auditing. Encrypt sensitive data as it travels across the network. Technologies like SSL/TLS for web traffic and (Virtual Private Networks) for remote access can help ensure data confidentiality. Regularly update and patch network devices and software to address known . Vulnerable systems are often targeted by attackers.
Divide your network into segments or zones, each with its own policies and controls. This helps contain and mitigate the impact of a security breach. Develop and enforce network security policies and best practices that define acceptable use, password management, and other security-related behaviors for users and administrators. Employ network monitoring tools to continuously monitor network traffic, looking for that might indicate a security breach. Have a well-defined incident response plan in place to react promptly and effectively to security incidents when they occur.
