A security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.
Description
A firewall acts as a barrier between a trusted internal network and untrusted external networks, such as the internet. It helps protect sensitive data from unauthorized access and cyber threats. Firewalls can be hardware-based, software-based, or a combination of both. They work by inspecting data packets and allowing or blocking them based on security rules set by the network administrator. Common features include stateful inspection, which tracks active connections, and packet filtering, which examines headers of packets to determine their legitimacy. Firewalls can also provide logging and alerting functions, helping IT teams respond to potential threats quickly. In today's digital landscape, firewalls are essential for businesses of all sizes to safeguard their networks against cyber attacks, data breaches, and other security incidents. Popular firewall solutions include Cisco ASA, Palo Alto Networks, and Fortinet, which are widely used in enterprise environments to ensure robust security measures are in place.
Examples
- Cisco ASA: A popular hardware firewall that combines advanced security features with high performance.
- Palo Alto Networks: Known for its next-generation firewall capabilities, providing deep packet inspection and threat intelligence.
Additional Information
- Firewalls can be deployed at different network points, such as gateways, servers, or individual devices.
- Regular updates and configuration reviews are essential to maintain optimal firewall effectiveness against evolving cyber threats.