Failed to connect to your instance Error establishing SSH connection to your instance. Try again later.

Hi,

To simplify the resolution of you current issue, I would suggest to start by connecting with EC2 Instance Connect: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/connect-linux-inst-eic.html

This tutorial may be helpful: https://www.youtube.com/watch?v=lxSNeF7BAII

If you have problems with Instance Connect, follow this guidance: https://repost.aws/knowledge-center/ec2-instance-connect-troubleshooting

When instance Connect works, you can go to next step with remote SSH and Filezilla.

Best,

Didier

1. check security group for your ec2 instance does not allow incoming ssh traffic.
2. the key pair that you specified when launching the instance is not the same key pair
3. the instance public dns name or ip address has changed.
4. try connection diffferent network.