Dropbear is a relatively small SSH 2 server and client. Dropbear SSH runs on a variety of POSIX-based platforms.
Dropbear is open source software, distributed under a MIT-style license. Dropbear is particularly useful for "embedded"-type Linux (or other Unix) systems, such as wireless routers.
Here are some key features of "Dropbear SSH":
· A small memory footprint suitable for memory-constrained environments - Dropbear can compile to a 110kB statically linked binary with uClibc on x86 (only minimal options selected)
· Dropbear server implements X11 forwarding, and authentication-agent forwarding for OpenSSH clients
· Can run from inetd or standalone
· Compatible with OpenSSH ~/.ssh/authorized_keys public key authentication
· The daemon, keygen, key converter, and client can be compiled into a single binary (ala busybox)
· Features can easily be disabled when compiling to save space
· TCP forwarding support
What's New in This Release: [ read full changelog ]
· This version fixes a security bug that could allow code execution as root by an authenticated user if a command="..." option is used in authorized_keys.
· It also includes various minor fixes and cleanups.