Dropbear is a software package written by Matt Johnston that provides a
Secure Shell-compatible server and client. It is designed as a replacement for standard
OpenSSH for environments with low memory and processor resources, such as
embedded systems. It is a core component of
OpenWrt
OpenWrt (from ''open wireless router'') is an open-source project for embedded operating systems based on Linux kernel, Linux, primarily used on Embedded system, embedded devices to Router (computing), route network traffic. The main components ...
and other router distributions.
Dropbear was originally released in April 2003.
Technology
Dropbear implements version 2 of the Secure Shell (SSH) protocol.
The cryptographic algorithms are implemented using third-party cryptographic libraries like
LibTomCrypt included internally in the Dropbear distribution. It derives some parts from OpenSSH to handle
BSD-style
pseudo terminals.
Features
Dropbear implements the complete
SSH version 2 protocol in both the client and the server. It does not support SSH version 1
backwards-compatibility in order to save space and resources, and to avoid the inherent security vulnerabilities in SSH version 1. SCP is also implemented. SFTP support relies on a binary file which can be provided by OpenSSH or similar programs.
FISH
A fish (: fish or fishes) is an aquatic animal, aquatic, Anamniotes, anamniotic, gill-bearing vertebrate animal with swimming fish fin, fins and craniate, a hard skull, but lacking limb (anatomy), limbs with digit (anatomy), digits. Fish can ...
works in any case and is supported by
Konqueror.
Dropbear supports
elliptic curve cryptography for key exchange, as of version 2013.61test and beyond.
See also
*
Lsh –
GNU Project
The GNU Project ( ) is a free software, mass collaboration project announced by Richard Stallman on September 27, 1983. Its goal is to give computer users freedom and control in their use of their computers and Computer hardware, computing dev ...
's implementation of ssh
*
Comparison of SSH clients
*
Comparison of SSH servers
References
External links
*
{{DEFAULTSORT:Dropbear (Software)
Cryptographic software
Free network-related software
Free security software
Secure Shell
Software using the MIT license
Free software programmed in C