Description: An internal firewall is a security system implemented within a network to protect internal resources and data from external threats. Unlike a perimeter firewall, which acts as a barrier between an internal network and the outside world, the internal firewall focuses on controlling traffic between different segments of the internal network. Its primary function is to prevent unauthorized access and protect the integrity of sensitive information, ensuring that only authorized users and devices can communicate with each other. Internal firewalls can be configured to enforce specific security policies, such as network segmentation, which allows for isolating different departments or functions within an organization. This not only enhances security but also optimizes network performance by reducing congestion. Additionally, these systems can log and monitor internal traffic, providing valuable information for intrusion detection and incident response. In various environments, implementing an internal firewall is crucial for compliance with security regulations and protecting critical assets from internal and external threats.
