AWS ec2实例无法从某些IP打开

Question

我正面临Aws EC2系统的问题。突然间它没有从某个ip开放

信息1： EC2 as hosting and select Ubuntu 14 as OS and install Apache PHP。

信息2： Rds as mysql database instance.

问题：

But Suddenly , it not opening from some ips. It SFTP Access is not working  
and it show connection time out. Also it site not opening from some iP

可以说一下这是什么问题吗？

编辑： 入站设置：

出界：

Answer 1

您必须查看22端口（对于SFTP）是否接受来自安全组中IP的连接：

http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-network-security.html