Issue with AWS Public API Gateway

Question

I created Public API Gateway for testing. There is an client VM machine which has nginx server. that machine send request to API Gateway. I faced one weird issue as when client nginx machine send request to API gateway , it receives 503 error as response but at same time not able to see any log at API Gateway end through Cloudwatch. But when i directly send request to API Gateway URL from my laptop, it worked fine. If i need to troubleshoot this issue, what will be the steps? If API Gateway is public, is there any way to capture network traffic of API Gateway same like wireshark?

Answer

Hello.

Can I resolve the name of API Gateway endpoint from VM?  
Also, can I access API Gateway from a VM with something like curl commands instead of via Nginx?  
Are there any logs output to Nginx access logs, error logs, etc. that can help identify the cause?

Issue with AWS Public API Gateway

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