安全组设置了还是无法连接

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私网连接 PrivateLink

能够实现专有网络VPC与阿里云上的服务建立安全稳定的私有连接，简化网络架构，实现私网访问服务，避免通过公网访问服务带来的潜在安全风险。

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产品文档

购买了阿里云服务器，按照百度教程设置了安全组规则，公网IP还是无法访问

![20170618203400145](https://yqfile.alicdn.com/53fc9e7ca2b5b86d73580fadeb91a9e151684976.png)如题，这样的设置已经设置了N次了，还是不行。。。 ...

来自：开发者社区 > 问答作者： 1712915995410855 浏览：11 回复：2

我们的MYSQL数据库在ECS服务器上，不是RDS，ECS上使用了安全组，只允许内网访问以及特定的IP的访问。现在要通过MaxCompute中建立数据源，连接上MYSQL，但是通过不了连接测试。请问该在mysql的ECS安全组上进行怎样的设置？比如设置那些内网IP ？

我们的MYSQL数据库在ECS服务器上，不是RDS，ECS上使用了安全组，只允许内网访问以及特定的IP的访问。现在要通过MaxCompute中建立数据源，连接上MYSQL，但是通过不了连接测试。请问该在mysql的ECS 安全组上进行怎样的设置？比如设置那些内网IP ？ ...

来自：开发者社区 > 问答作者：琴瑟浏览：464 回复：2

为什么我在安全组里放行了 TCP 80 端口，还是无法访问 80 端口？

为什么我在安全组里放行了 TCP 80 端口，还是无法访问 80 端口？ ...

来自：开发者社区 > 问答作者：行者武松浏览：14 回复：1

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为什么脚本中设置了Once Only Controller，压测的时候还是会重复发请求？ - 性能测试 PTS

一次控制器（Once Only Controller），但是将脚本上传至PTS的JMeter压测后，线程组的请求还是会循环重复执行。如下图所示 ...

来自：帮助 > 性能测试 PTS

windows ecs 无法连接服务器安全组防火墙均已设置

安全组已设置80端口 ping外网ip不通无法连接iis部署的网站远程桌面连接可以连接本地可以访问网站服务器外网弹性ip: 139.196.96.212 ...

来自：开发者社区 > 问答作者： adam.w 浏览：73 回复：1

客户端连接是长连接还是短连接？ - 云数据库 Memcache

推荐长连接。若业务并发量大，为性能考虑，可以开启连接池功能。 ...

来自：帮助 > 云数据库 Memcache > 常见问题

远程桌面犹由于一以下原因之一无法连接远程计算机。我把防火墙关了，把远程连接打开了，端口也打开了，还是连不上，求大神指导,管理终端可以登录

![5_DG_LBA22GU1K5FDIWQD](https://yqfile.alicdn.com/45ad5659e79e1091945748722c1d34c0fc73aa83.png)远程桌面犹由于一以下原因之一无法连接远程计算机。我把防火墙关了，把远程连接打开了，端口也打开了，还是连不上，求大神指导 ...

来自：开发者社区 > 问答作者： 121212v 浏览：38 回复：1