Segmenteringsbrandvägg

Segmenteringsbrandvägg, also known as a segmentation firewall, is a network security device designed to control traffic between different network segments. Its primary function is to create smaller, isolated zones within a larger network, thereby limiting the lateral movement of threats. By dividing a network into segments based on factors like user roles, device types, or application criticality, a segmentation firewall can enforce granular security policies. This means that traffic attempting to move from one segment to another is inspected and must comply with predefined rules. If a threat compromises one segment, it is prevented from easily spreading to other parts of the network. This approach is a key component of zero-trust security models, where trust is never assumed and verification is always required. Implementation can involve physical firewalls or virtual firewall solutions deployed within software-defined networks. The goal is to reduce the attack surface and contain potential breaches, minimizing their impact. This contrasts with traditional perimeter firewalls that primarily focus on securing the boundary between an internal network and the external internet. Segmentation firewalls are particularly useful in complex environments such as large enterprises, data centers, and cloud infrastructures.