From Forum Nokia Wiki

• PuTTY for symbian os PuTTY SSH client for Symbian OS. More details on PuTTY site.

PuTTY is a free SSH client developed by Simon Tatham and others. There are port to the Symbian OS, with support for S60, Series 80 Communicators, and Nokia 7710. All Nokia devices based on Symbian OS and all S60 devices by all manufacturers are supported. Separate UIQs are available from Robert Horvath and MobilEyes AB for UIQ 1 and 2, and from Taneli Leppä for UIQ 3.