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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Firewall - Glossary | MDN | 1/3 | https://developer.mozilla.org/en-US/docs/Glossary/Firewall | reference | web, html, css, javascript, documentation | 2026-05-05T05:31:28.265245+00:00 | kb-cron |
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Firewall
A firewall is a system that filters network traffic. It can either let it pass or block it, according to some specified rules. For example, it can block incoming connections aimed at a certain port or outgoing connections to a certain IP address. Firewalls can be as simple as a single piece of software, or more complex, like a dedicated machine whose only function is to act as a firewall.
In this article
See also
- Firewall (computing) on Wikipedia