← GlossaryWas this page helpful?
What does "firewall" mean in programming?
firewall is one of the most common terms in software development. This guide explains what it means, how it is used in practice, and why it matters, with real examples from the developer world.
Definition
A network security system that monitors and controls incoming and outgoing traffic based on predefined rules. Firewalls block unauthorized access while allowing legitimate traffic through.
Example
"Configure the firewall to allow traffic only on ports 80 and 443."
Can you put this sentence in the right order?
Tap the words to place them here
Keep building your technical English
You just looked up what this word means. Lingua-e turns vocabulary like this into full practice: fill-in-the-blanks, listening, and real developer conversations.
Practice this for free