Introduction to Firewall
A firewall is a security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between trusted internal networks and untrusted external networks, such as the internet, to protect against cyber threats like hackers, malware, and unauthorized access.
Types of Firewalls
- Packet filtering firewall
- Proxy firewall
- Stateful inspection firewall
- Next-generation firewall
How Firewalls Work
Firewalls examine data packets passing through it and apply rules to block or allow them based on criteria such as IP addresses, ports, and protocols. They can be implemented as hardware devices, software applications, or a combination of both.
Benefits of Firewalls
- Protects against external threats
- Controls internal network access
- Monitors traffic for suspicious activities
- Ensures compliance with security policies
Example Case Study
ABC Corp. implemented a firewall solution to secure its network from cyber attacks. The firewall detected and blocked a ransomware attempt, saving the company from data loss and financial damages.
Statistics on Firewall Usage
According to a survey, 95% of organizations use firewalls to protect their networks, with 78% reporting a decrease in security incidents after implementing a firewall.
