32 lines
655 B
Markdown
32 lines
655 B
Markdown
---
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title: "UFW"
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type: entity
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tags: [firewall, networking, security]
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date: 2026-04-16
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---
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## Definition
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UFW（Uncomplicated Firewall）是 Ubuntu 默认的防火墙管理工具，提供简化的 iptables 命令接口。
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## Role
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- Ubuntu 系统防火墙管理
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- 控制入站和出站网络流量
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## Aliases
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- Uncomplicated Firewall
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## Key Properties
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- 命令行工具
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- 默认阻止所有入站连接
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- 支持 IPv4 和 IPv6
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## Usage
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```bash
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sudo ufw allow ssh # 允许 SSH
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sudo ufw allow 22/tcp # 允许 SSH 端口
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sudo ufw status # 查看状态
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```
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## Connections
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- [[Ubuntu]] ← uses ← [[UFW]]
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- [[OpenSSH]] ← protected_by ← [[UFW]] |