I can not connect to my ec2 instance by ssh, sg port checked
I start my free trial ec2 instance (AMI : amzn2-ami-kernel-5.10-hvm-2.0.20220719.0-x86_64-gp2), and got a public ip address on it , security group rules expose all ports no matter in&outbound even
But i just can not connect to it , i have received "Connection failed" msg in my local pc ssh client,
and i also try to connect it by using aws console "EC2 Instance Connect" option to do that, it fail as well. (console msg here)
AND I even stop this ec2 instance and start a new one with totally new config like previous one, but got same result.
By using port scan tool , I found the port 22 is closed, question is that my sg rules open it definitely
(console screenshot here)
Finally, I found a stackoverflow question like my situation , this answer maybe the result ? Is my account "isolated" ? Is there anyone could tell me something useful ?
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Can you try the points below:
- Check your internet gateway(IGW)
- Is your IGW attached to the right VPC
- Check your route table (is the host in question in the right subnet)
- Check your network ACL (remember it's not stageful as SG - traffic must be allowed on both directions)
- With the Source as IGW & Destination host (port 22), run the Reachability Analyzer and share the result.
Have you checked the routing of the EC2 instance ? Have you connected to the Internet Gateway for the traffic to reach the internet and reverse ? The error clearly mentions that there is a network setting missing from the configuration.
Thanks guys! The reason of this problem is that I had created a new vpc , and i did not set the "0.0.0.0/0" for igw in the route table of this new vpc , so this ec2 ins can not access internet through this vpc bidirectionally
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Is your EC2 instance in a public subnet? If so, have you checked if your subnet is associated with a route table that has a route to an internet gateway)?