Free public SSH server for testing purposes

I'm writing an application that makes connections to SSH servers. It doesn't need anything specific from the server (except running under GNU/Linux). I need SSH servers for running my application tests.

I was wondering, are there some kind of free and open to anyone SSH servers ? May be it's an idea for a new service :)

From serverfault Julien Nicoulaud

• Check out the Free Shell Accounts list.

  From ptman

• http://sdf.org

  Have used an account here on and off over the years. Recommended!

  Bill B : +1 for SDF. I've had a user account there for years.
  From Skit

• Maybe you can use virtualization like virtualbox ? You can setup a running small linux server quickly this way.

  From Toubib