Using SSH / Telnet client, you can connect and log in to a remote machine (your Virtual Server) from anywhere in the world, as if you were sitting right in front it.
SSH client is a software program which uses the secure shell protocol to connect to a remote computer. IN SSH you can use all commands used in Telnet client. The only difference is that the communication is made via encrypted channels to and from your Virtual Server.
PuTTY – PuTTY is an SSH and telnet client. PuTTY is a free implementation of Telnet and SSH for Win32 platforms
Poderosa – Poderosa is a tabbed terminal emulator for Windows.
Tera Term – Free Telnet client for Windows (16 and 32 bit).
OpenSSH – Freely available SSH1 and SSH2 implementation. Designed as part of the OpenBSD project.