Egress Filtering

Egress filtering is a network security measure that involves filtering outbound network traffic to ensure that only explicitly authorized data is allowed to exit a network. This method is employed to control the flow of outgoing traffic and prevent sensitive information from being transmitted to unauthorized external entities. Additionally, egress filtering can help mitigate the risk of malicious activities such as data exfiltration, where sensitive data is intentionally sent out of the network by an attacker.

The implementation of egress filtering typically involves the use of firewalls, routers, or other network security devices that can inspect and control network traffic based on predefined security policies. These policies are configured to allow or block specific types of traffic based on factors such as destination addresses, ports, and protocols. By regulating what data can leave the network, organizations can enhance their overall security posture, protect data integrity, and comply with regulatory requirements regarding data protection and privacy.