EXFO FTB-2 - Manual (Page 194)

Accessing Your Unit Remotely
184 FTB-2 and FTB-2 Pro
Working With TightVNC
4. If you want to secure the connection with a password, select the
Require VNC authentication check box. If you prefer not to be
prompted for a password when you connect with TightVNC, clear the
check box.
5. If you prefer a connection secured with a password, proceed as
follows:
5a. Depending on the type of connection that you want, under
Primary password or View-only password, tap the
corresponding Set button.