Description: Ingress filtering is a method used to prevent packets with invalid source addresses from entering a network. This process is carried out on network devices such as routers and firewalls, which analyze incoming data packets before allowing them access to the internal network. The primary function of ingress filtering is to protect the network infrastructure from malicious attacks, such as IP spoofing, where an attacker tries to impersonate a legitimate IP address. By implementing ingress filtering policies, organizations can establish specific rules that determine what types of traffic are acceptable and which should be blocked. This not only enhances security but also optimizes network performance by reducing unwanted traffic. Additionally, ingress filtering can be part of a broader Quality of Service (QoS) strategy, which aims to ensure that network resources are used efficiently and that critical applications are prioritized in traffic. In summary, ingress filtering is an essential tool in modern network management, contributing to security and operational efficiency.
