Using Konqueror you can start up an rlogin session with a server hosting the rlogin service.
To use this kioslave feature, in the Konqueror
URL bar, type
This will initialize Konsole with an rlogin session, prompting you for your password.
The rlogin kioslave uses the username of the account you are currently using in KDE.
After you have successfully entered your password, you can begin your remote session.
See the manual: rlogin.