Dropbear is an SSH 2 server, designed to be usable in small memory
environments. It supports:

	* Main features of SSH 2 protocol
	* Implements X11 forwarding, and authentication-agent forwarding
	for OpenSSH clients
	* Compatible with OpenSSH ~/.ssh/authorized_keys public key
	authentication

WWW: https://matt.ucc.asn.au/dropbear/dropbear.html