This is an update to my posting Remote Multilevel Desktop Sessions from last August. At that time I suggested using a combination of Xvfb(1) and vino-session (x86) or x0vncserver (SPARC) to get both the features of vnc and the Trusted Extensions X protocol extension to work together. However, starting in SXDE 1/08 and the upcoming Solaris 10 update 5 beta, we now deliver a version of Xvnc which supports both protocols in a single binary based on the current version of Xorg. Since it uses a virtual framebuffer, it should work with either architecture.
The easiest way to take advantage of this on a headless server running Trusted Extensions is customize the file /etc/dt/config/Xservers. Simply comment out the default line and add this new one:
# :0 Local local_uid@console root /usr/X11/bin/Xserver :0 -nobanner
:0 Local local_uid@none root /usr/X11/bin/Xvnc :0 -nobanner
-AlwaysShared -SecurityTypes None -geometry 1024x768x24 -depth 24
Note that I have disabled password authentication because I am using this machine for software development. If you need more restrictive access, remove the -SecurityTypes option.
To make a remote connection (using a vnc client) your client machine should be assigned the admin_low template in server's tnrhdb file.