ec2 AWS 服务器实例上的 S3 图像上传问题

Question

I am using yii2, php 5.5.24

I am trying to upload images in s3 bucket from different ec2 instances with same credentials

2 instances and localhost working fine but 1 instance is not uploading images see the image below to see error which I am getting

I spend more than 3 days to solve this problem but get no success.

I found the same/similar issue here not solved , here not solved and here not solve

EDIT

One more thing is, it was working before 1 week after that I am getting this error only on one instance and i have not update any version or library functions

Please Help Me Guys , I don't have any idea what to do now. its really a very major issue for me

THANKS IN ADVANCE

Answer 1

We have fixed this issue. I am posting my answer because it waste my whole week.

The issue was the network time protocol, we weren't allowing the traffic of UDP Port 123 for NTP to sync the time.

We fixed that by editing the security group of EC2 and everything works perfectly :).