If you are looking for secure connectivity, I am sure that there a lot of free and open source softwares that you can use. But if you are looking for services that are backed with real customer support, then visit Pragma Systems and check their services.
If you require high availability and secure connections for your SSH and Telnet Command, Pragma Systems can provide you with what you need. You can tell that they deliver quality services because of their 16 years of technical expertise and extensive software solutions.
One of their services called Pragma Fortress SSH provides secure SSH environment for you. Other features includes optimized for handheld RF device usage and ability to run some Linux commands such as vi, emacs, ftp, lynx and perl.
Fortune 500 companies trust their connectivity services with Pragma Systems, evidence of years of expertise with secure remote connectivity services.