From Cibernética Americana

I found the Windows Configuration page insufficient for getting started in a straightforward way using darcs over ssh from Windows peers to a FC4 repository host.

This Gentoo oriented page was essential in the resolution.

In summary here are the steps which I found led to succesful passwordless login:

  1. Run ssh-keygen to create dsa file.
  2. Move public key file to DOS and convert using puttygen
  3. Move files as directed in second page above in target Unix server account
  4. Load converted file into pageant.

At this point ssh user@hostname logs in without prompting for password, and intended darc interoperability will work. Besides above I think the only thing I did was enable the mentioned options in sshd_config (did before started working with second page above).