S3Express: Amazon S3 Command Line Utility

Amazon S3 command line utility for Windows. Copy, query, backup multiple files to S3 using the Windows command line.

S3Express FAQ and Knowledge Base

Main Page > Browse Categories > Known Errors with Solutions > Error 51 when accessing S3 buckets with periods (.) in the name

Error 51 when accessing S3 buckets with periods (.) in the name

Error

When accessing Amazon S3 buckets with periods (.) in the name, S3Express reports error "51 - SSL: no alternative certificate subject name matches target host name".

This error is caused by validation failure of the SSL certificate for the Amazon S3 servers.

Solution

Upgrade S3Express to version 1.5.4 or newer. Upgrading is free if you already purchased a license for S3Express version 1, see: www.s3express.com/kb/item29.htm

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