I am trying s3cmd from command line and when i am configuring using s3cmd --configure following lines of information its asking me. I know I am giving proper Access Key and Secret key. But I think the problem is with Default Region: Mumbai or S3 Endpoint: ap-south-1.amazonaws.com or DNS-style bucket+hostname:port template for accessing a bucket:. My S3 bucket is in Mumbai, India.

Access Key: ASOMETHINGJFDGERCEMUA
Secret Key: 5q2tbwdf43/sdfsdfsdf/AopqPd73QaiN4fr3e3fv8wE
Default Region: Mumbai
S3 Endpoint: ap-south-1.amazonaws.com
DNS-style bucket+hostname:port template for accessing a bucket: %(bucket)s.s3.ap-south-1.amazonaws.com
Encryption password:
Path to GPG program: None
Use HTTPS protocol: True
HTTP Proxy server name:
HTTP Proxy server port: 0

Error:

ERROR: Test failed: [Errno 8] nodename nor servname provided, or not known