The use of ssh enables a secure connection from a local X server to a remote application server. Set X11Forwarding and AllowTcpForwarding entries to yes

Although using public key authentication instead of passwords is a great method for increasing the security of SSH transfers, transferring SSH identity keys can be a royal pain. First, you create your key pairs; then, you copy the public key into the correct locations on all the machines you want to log into.

"... «A weakness has been discovered in the random number generator used by OpenSSL on Debian and Ubuntu systems. As a result of this weakness, certain encryption keys are much more common than they should be, such that an attacker could guess the key through a brute-force attack given minimal knowledge of the system.

Having an SSH server can be incredibly useful; you can access a “headless” server without a monitor, get shell access to your system from anywhere in the world, transfer files without using FTP, securely tunnel VNC or web browsing, safely restart a locked-up system, and a lot more. However, improperly setting up a SSH server can leave your system vulnerable. Here’s how to install a secure SSH server (specifically OpenSSH) on Ubuntu or other Debian-based distributions.

SSH tools, long used by UNIX gurus to perform complicated administrative tasks over the internet on machines miles away, are a very simple and user-friendly solution for more conventional purposes. Ubuntu users, read on to learn how to use SSH to run your favorite GNU/Linux software on Microsoft Windows—without installing any software on the Windows box.