Firewall is a network security system that monitors and controls incoming and outgoing traffic based on a set of configurable rules. It's like a bouncer at a nightclub, deciding who gets in and who gets kicked out based on how sketchy they look.

How to use it in a sentence

1. "I spent all day configuring the firewall rules for our new cloud deployment because apparently DevSecOps is just a fancy word for 'congratulations, you're now also responsible for security!'" the overworked software engineer complained.

2. The startup's lead developer realized they had forgotten to set up a firewall when their entire customer database was leaked online, prompting an emergency 3 AM phone call from the CEO who saw it mentioned on Hacker News.

If you actually want to learn more...

• A Beginner's Guide to Firewalls: This article provides a comprehensive introduction to firewalls, explaining their purpose, types, and how they work to secure networks. Read more

• Firewall Best Practices: Learn about essential firewall configuration best practices to ensure optimal network security, including rule management, logging, and regular audits. Read more

• Next-Generation Firewalls: Discover the advanced features and capabilities of next-generation firewalls (NGFWs) and how they differ from traditional firewalls in protecting modern networks. Read more

Note: the Developer Dictionary is in Beta. Please direct feedback to skye@statsig.com.