xhost RHEL3 != RHEL4

[Diego Brito Veiga - b04917 <diego veiga freescale com>]

Hi guys,

From RHEL3 to RHEL4 there was some security improvements on gdm.conf file.
I know that I need to enable the gdm.conf DisallowTCP=false, set the 
DISPLAY and do a xhost <machine> to open remote X windows.
End users concerns:
Is there a way to avoid the xhost <machine>? Just like RHEL3: set the 
DISPLAY and open the remote X windows.

Cheers

--
Diego Brito Veiga