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[帮助文档] 如何开启或关闭Linux实例中的系统防火墙

防火墙是可以帮助计算机在内部网络和外部网络之间构建一道相对隔绝的保护屏障，从而保护数据信息的一种技术。如果服务器开启了防火墙，并设置了屏蔽外界访问的规则，那么在远程连接该服务器时，可能会导致访问失败。本文主要介绍在Linux操作系统中，如何开启或关闭系统防火墙。

[帮助文档] 如何开启或关闭Linux实例中的系统防火墙

说明免责声明：本文可能由社区贡献或涉及第三方产品信息，建议您访问社区或第三方产品的官方网站获取帮助与支持。第三方产品不在阿里云售后支持范围。本文仅供参考，阿里云不做任何暗示或其他形式的承诺。免责声明：概述防火墙是可以帮助计算机在内部网络和外部网络之间构建一道相对隔绝的保护屏障，从而保护数据信息的一种...

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Linux系统关闭防火墙

阿里云的ecs服务器用的Linux如何关闭防火墙，关闭防火墙和配置安全组策略有关吗？还有内网IP指的是什么，和127.0.0.1有什么关系吗？我装了MySQL后用127.0.0.1访问数据库怎么不能访问呢？

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更新时间 2022-11-16 10:51:12

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