Key Authentication in FreeSSHd

generate key-pair using puttygen.exe
enter desired username as Key comment
Save private key
copy OpenSSH-key out of the box Public key for pasting into OpenSSH authorized keys file and paste into a file, name that file after the username - without any extension
put that file in the key directory of freeSSHd
restart the freeSSHd service

wiki.mbirth.de