Hi,
I would like to save backups files to aws S3.
I enabled SFTP access to S3 via Amazon transfer. I can connect with filezilla without problem.
However the only authentication method is via key files.
So I generated key files with: ssh-keygen -t rsa -m PEM -f aws
I imported both files pub / private to my user
But when I try copy with:
/tool fetch upload=yes url=sftp://xxxxxxxx/test.txt user=admin src-path=test.txt
I always get connection time out 
Could you please let me know if sftp upload with key files is possible on mikrotik ?
Thanks and regards,
MK