Security · Website glossary

Firewall

Quick answer · What is Firewall?

A control that permits or blocks network traffic according to configured rules.

IN PRACTICE

Firewall: an example

A server allows required web traffic while restricting administrative access to approved sources.

KEEP IN MIND

A network firewall does not understand or prevent every application-level flaw.

Put the idea to work

Frequently asked questions

What is a practical example of Firewall?

A server allows required web traffic while restricting administrative access to approved sources.

Does a network firewall prevent every application flaw?

A network firewall does not understand or prevent every application-level flaw.

Which concepts should I read alongside Firewall?

Web application firewall: A control that inspects web requests and responses against rules intended to identify or block unwanted application traffic.
Authorization: The decision about which actions or resources an identity is allowed to access.