So I wanted to create a test server so I created an image from my existing, working instance. I did this by navigating to image and templates/create image. I then created an AMI and tried to launch a new instance with the AMI.

I left all settings as default. I did create a new key pair for the test instance. Now my previous EC2 has stopped working due to this. Ive done quite a few checks:

• Ensure elastic ip is mapped to cloudflare still and its the same
• Checked Security Groups, Route Tables and VPC settings and they allow traffic
• Check NACLs and they are configured correctly to the IGW
• Checked system logs
• Checked cloudtrail logs and cant see anything obvious here that would affect the original server

The only thing that I can see is perhaps causing this issue is that ddclient encountered errors yesterday, more info here:

<Command>SETDNSHOST</Command>: The client was trying to set the DNS host record.
<ErrCount>1</ErrCount>: Indicates there was 1 error in the response.
<Err1>CUSTOM-DNS</Err1>: This suggests a custom DNS error occurred.
<ResponseString>CUSTOM</ResponseString>: The response indicates a "CUSTOM" type error.
<Done>true</Done>: The operation was marked as done, but with errors.

Im really at a loss as what could be the issue here. The DNS record doesnt work however also accessing the ip directly doesnt work. Ive also checked cloudflare for outages and disabled cloudflare to no avail. A new SG was created when I launched the new image, which I have now removed and I have terminated the cloned instance too.

Really curious about what is causing the issue as I have checked the obvious things.