Being able to securely connect to remote hosts from windows using SSH is a very important and common requirement, especially when you are working with remote linux servers. SSH is a high-security protocol. It uses strong encryption to shield your connection from eavesdropping. capture, and other sorts of attack. In this post we will discuss exactly how to do this using PuTTY tool. We will also show how to create and save PuTTY sessions and discuss how to configure login without password using key pair.PuTTY is a free, open source SSH client and a terminal emulator for windows. It has a very easy to use user interface and the ability to configure and store sessions, so that we can connect to configured hosts in a single click.