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pages.zh/linux/ufw.md
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# ufw
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> 简易防火墙。
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> `iptables` 的前端,旨在简化防火墙的配置。
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> 更多信息请访问:<https://wiki.ubuntu.com/UncomplicatedFirewall>。
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- 启用 ufw:
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`ufw enable`
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- 禁用 ufw:
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`ufw disable`
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- 显示 ufw 规则及其编号:
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`ufw status numbered`
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- 允许来自本主机端口 5432 的入站流量,并添加服务标识的注释:
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`ufw allow {{5432}} comment "{{Service}}"`
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- 仅允许来自 192.168.0.4 的 TCP 流量到本主机的任何地址,端口为 22:
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`ufw allow proto {{tcp}} from {{192.168.0.4}} to {{any}} port {{22}}`
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- 拒绝本主机端口 80 的流量:
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`ufw deny {{80}}`
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- 拒绝所有 UDP 流量到端口范围 8412:8500:
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`ufw deny proto {{udp}} from {{any}} to {{any}} port {{8412:8500}}`
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- 删除特定规则。规则编号可以通过 `ufw status numbered` 命令获取:
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`ufw delete {{rule_number}}`
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