无法ssh / http进入EC2实例

debugcn 发表于 Dev

塔莎

我为此不知所措，请帮忙。

我正在默认的公共VPC中创建EC2实例，但是我无法通过ssh或http连接到运行该计算机的实例或Web服务器。我检查了以下内容

SG从0.0.0.0/0开始允许入站SSH，HTTP和HTTPS并分配给我的实例
默认的VPC，路由表的0.0.0.0/0指向IGW
NACL配置为允许所有流量。我也手动更新为仅允许HHTP，HTTPS和SSH
通过运行chmod 400文件名，已为密钥授予了使用权限

尽管所有这些都无法连接到EC2实例，但AMI是Amazon Linux 2 AMI

When I try to ssh, i get a connection timeout error after a while, initially, i thought it was my office network but I am also getting the same from my home network with no firewalls in place

John Rotenstein

To allow an SSH connection, you will need:

An Amazon EC2 instance running Linux launched in a public subnet (defined as having a Route Table that directs 0.0.0.0/0 to an Internet Gateway)
A Security Group permitting Inbound access on port 22 (Outbound configuration is irrelevant)
Network ACLs left at their default settings of Allow All in both directions
A Public IP address associated with the instance

根据您的描述，我想说问题可能出在NACL上。SSH会话的返回流量将返回到启动服务器上的源端口，而不是端口22。通常，只有在有特定原因（例如创建DMZ）时，才更改NACL。我建议您将NACL规则重置为“允许双向所有流量”。

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