Firewall Rules
Firewall rules are configuration settings that define how a firewall filters network traffic by allowing or blocking data packets based on criteria such as source/destination IP addresses, ports, and protocols. They act as a security policy to control inbound and outbound traffic, protecting networks from unauthorized access and threats. These rules are implemented in hardware or software firewalls to enforce network security perimeters.
Developers should learn firewall rules to secure applications and infrastructure, especially when deploying services in cloud environments or managing on-premises servers. They are essential for configuring access controls, preventing attacks like DDoS or port scanning, and ensuring compliance with security standards in DevOps and system administration roles.