Google

zaTelnet for iPhone/iPad: iOS Telnet/SSH2 client

iPhone documentation

iPad documentation

A protocol client, designed for network system administrators, end users and web designers, working with Unix/Linux/BSD systems. This iOS operating system version comes with extended functionalities, including iPhone/iPad support, ability to save, restore and edit sessions, screen with adjustable size, floating keyboard, different font sizes, support of all possible display sizes and orientation, external/internal keyboard remapping, custom fonts support and many more.

ZaTelnet is a  SSH2 client for devices supporting iOS. It also emulates terminal VT100 and partially xterm (basically enough for working with Midnight Commander and others console programs). ZaTelnet  supports SSH2 authorization by "plain password", "interactive password" and private key file.

ZaTelnet  offers extended opportunities for interface customization, such as  portrait and landscape orientation modes, screen with adjustable and fixed scrollable size  and different font sizes. Also, ZaTelnet features special keyboard. Additional convenience comes from transparent keyboard, designed specially for iPhone/iPad. What is more, ZaTelnet enables you to change font size for console, screen orientation without shutdown session. The client also enables easy saving, editing and restoring of sessions. 

ZaTelnet Professional boasts a handful of improvements that make remote administration of Unix and other servers via SSH2 protocol using mobile devices simpler and more efficient.