Anyterm allows you to have secure terminal access to a server without needing any special software on a client machine beyond a Web browser. For example, with Anyterm you can open a terminal into your server from an Internet cafe. Because Anyterm uses a pseudo-terminal for communication with the shell, you can run most command-line tools from an Anyterm terminal running inside a Web browser.
On the server side you can either install the Anyterm software yourself or use a server provided by my.anyterm.org for about a $20 per year subscription fee. Two main drawbacks of installing Anyterm on your own server are that it is an Apache module, so you have to have access to install those, and you have to handle security lockdown yourself.
more here