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Spelling: SSH
SecureSHell is an enhanced Shell [1] used for secure (encrypted)
communication with a remote computer.
SSH [2] is the protocols name but it may be used to refer to the
original (now commercial) implementation as well as the open source
version OpenSSH [3], either way, it is the preferred replacement for
Telnet [4].
SSH
SSH [5] encrypts ALL traffic.
The login transaction and all further traffic is secured against
casual eavesdropping.
(It is worth mentioning that SCP is a Secure CoPy program that
adheres to the same principal and is usually (?) packaged with the SSH
program.)
TELNET
Telnet [6] is a shell WITHOUT any security features (no encryption).
Login passwords and all further transmissions are _sent in the
clear_. ie:- anyone with access to the traffic has the potential to
read it. Wireless networks such as ours are intended to be open,
broadcasting administration passwords or details is not the intention
though.
Telnet [7] still has its uses (checking mail accounts, server
versions) and SSH [8] can be exploited, however any administrative
traffic sent over an open network should be secured and SSH provides a
suitable level of protection.
WHERE TO GET IT.
SSH [9] - commercial version
OpenSSH [10] - a FREE version of the SSH protocol suite (BSD Licence)
Putty [11] - PuTTY [12] is a free implementation of Telnet and SSH
for Win32 and Unix platforms
The front page of OpenSSH.org [13] has a comprehensive listing of SSH
alternatives for most Operating Systems, under the ALTERNATIVES menu.
Links:
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[1] http://melbournewireless.org.au/?Shell
[2] http://melbournewireless.org.au/?SSH
[3] http://melbournewireless.org.au/?OpenSSH
[4] http://melbournewireless.org.au/?Telnet
[5] http://melbournewireless.org.au/?SSH
[6] http://melbournewireless.org.au/?Telnet
[7] http://melbournewireless.org.au/?Telnet
[8] http://melbournewireless.org.au/?SSH
[9] http://www.ssh.com/
[10] http://www.openssh.org/
[11] http://putty.obengelb.de/
[12] http://melbournewireless.org.au/?PuTTY
[13] http://www.openssh.org/
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