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This PR adds all the guides from [Visual Guides](https://bytebytego.com/guides/) section on bytebytego to the repository with proper links. - [x] Markdown files for guides and categories are placed inside `data/guides` and `data/categories` - [x] Guide links in readme are auto-generated using `scripts/readme.ts`. Everytime you run the script `npm run update-readme`, it reads the categories and guides from the above mentioned folders, generate production links for guides and categories and populate the table of content in the readme. This ensures that any future guides and categories will automatically get added to the readme. - [x] Sorting inside the readme matches the actual category and guides sorting on production
45 lines
1.5 KiB
Markdown
45 lines
1.5 KiB
Markdown
---
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title: "Firewall Explained to Kids and Adults"
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description: "Learn about firewalls: network security, types, and how they protect us."
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image: "https://assets.bytebytego.com/diagrams/0191-firewall.jpeg"
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createdAt: "2024-02-16"
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draft: false
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categories:
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- security
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tags:
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- "Network Security"
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- "Firewall"
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---
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A firewall is a network security system that controls and filters network traffic, acting as a watchman between a private network and the public Internet.
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They come in two broad categories:
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* Software-based: installed on individual devices for protection
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* Hardware-based: stand-alone devices that safeguard an entire network.
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Firewalls have several types, each designed for specific security needs:
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### Packet Filtering Firewalls
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Examines packets of data, accepting or rejecting based on source, destination, or protocols.
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### Circuit-level Gateways
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Monitors TCP handshake between packets to determine session legitimacy.
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### Application-level Gateways (Proxy Firewalls)
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Filters incoming traffic between your network and traffic source, offering a protective shield against untrusted networks.
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### Stateful Inspection Firewalls
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Tracks active connections to determine which packets to allow, analyzing in the context of their place in a data stream.
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### Next-Generation Firewalls (NGFWs)
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Advanced firewalls that integrate traditional methods with functionalities like intrusion prevention systems, deep packet analysis, and application awareness.
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