# OpenSSH/Other SSH Implementations

## Dropbear

Dropbear is a smaller,
modular, open source SSH2 client and server available for all regular
POSIX platforms. Dropbear is partially a derivative of OpenSSH and it is
often used in embedded systems because very small binaries can be
produced. Functions that are not needed can be left out of the binary,
leaving a lean executable. Thus a working SSH server can be boiled down
to 110KB by trimming away various functions.

Many distributions and products use Dropbear. This includes OpenWRT,
gumstix, Tomato Firmware, PSPSSH, DSLinux, Meego, OpenMoko, Ångström
(for Zaurus), ttylinux, Sisela, Trinux, SliTaz, Netcomm, US Robotics,
some Motorola phones, and many, many more.

-   <https://matt.ucc.asn.au/dropbear/dropbear.html>

## Tectia

Tectia is from SSH Communications
Security Corporation which is based in Finland. It is a closed-source
SSH client and server with FIPS support.

-   <http://www.ssh.com/?option=com_content&view=article&id=236&Itemid=364>

## Solaris Secure Shell (SunSSH)

Sun SSH is fork of
OpenSSH 2.3, with many subsequent changes.

-   <http://hub.opensolaris.org/bin/view/Community+Group+security/SSH>

## GlobalSCAPE EFT Server

EFT Server is a closed binary that
can include SSH and SFTP modules as extensions.

-   <http://www.globalscape.com/eft/>

## Gravitational Teleport

Teleport provides an
Apache-licensed SSH server and client written in Golang. It supports
only IPv4 and not IPv6 at this time.

-   <http://gravitational.com/teleport/>

 
