Ec2 instances issue

Question

Hello,

I have been experiencing an issue to create EC2 instances, since yesterday I recreated new linux instances more than 10 times and facing the same issue. After I create them the ssh connection on them cannot be established and times out. I have tried with different firewall settings, opening the ports, even used previous established VPC and firewalls that used to work like a few months ago but nothing. Is it maybe a zone issue or some DDOS on aws ? I literaly cannot create any instance that can be connected to in Tokyo Zone 1A since yesterday.

Answer

Hello.

If it is a timeout error, it is possible that SSH traffic is not allowed due to security group or network ACL settings.  
So, first try the troubleshooting methods in the document below.  
https://repost.aws/knowledge-center/ec2-linux-resolve-ssh-connection-errors

Also, make sure that the route to the Internet gateway is set in the route table of the subnet where EC2 is running.  
https://docs.aws.amazon.com/vpc/latest/userguide/WorkWithRouteTables.html#AddRemoveRoutes

Also check to see if your on-premises router is blocking SSH traffic.

Ec2 instances issue

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