What is a firewall?
A firewall is a security system that protects your server from unauthorised access and attacks.
How does a firewall protect a server?
A firewall inspects all network traffic entering and leaving the server. Based on its rules, it allows or blocks specific connections.
Types of firewall
- Hardware firewall - a physical device that protects an entire network
- Software firewall - a program running on the server
- WAF - a Web Application Firewall for web applications
- Cloud firewall - a firewall in the cloud
Why does a firewall matter?
A firewall is your server’s first line of defense. Without one, the server is exposed to attacks, malware and unauthorised access.
Frequently asked questions
What is a firewall?
A firewall is a security system that monitors and controls network traffic based on defined security rules, protecting a server from unauthorised access.
What is the difference between a hardware and a software firewall?
A hardware firewall is a physical device that protects an entire network, while a software firewall is a program installed on a server that protects that specific system.
What is a WAF (Web Application Firewall)?
A WAF is a specialized firewall that protects web applications from attacks such as SQL injection, XSS and other web threats by filtering HTTP traffic.
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