Internet Express for Tru64 UNIX Version 6.8 Administration Guide (14233)

4. You can specify a different system configuration file, a different kernel, or both, before
proceeding with the installation (Figure 9-4).
Note:
Modifications that FireScreen makes to your system's kernel configuration file are not
preserved when you update the Tru64 UNIX operating system. You must reinstall FireScreen
after updating the operating system to replace these modifications and to ensure that the
kernel is built with the option required by FireScreen.
All FireScreen files that had been customized before updating the operating system are
saved during the FireScreen installation with the .bck file extension (including the default
FireScreen configuration file, /etc/firescreen.conf). To return FireScreen to its original
configuration, you must move the saved customization files (with the .bck extension) back
to their original file names (without the .bck extension).
Figure 9-4 Install FireScreen Form for Specifying the System Configuration File and Kernel
5. Click on Continue Install.
At this point in the FireScreen installation, the kernel you specified is examined to determine
whether gateway screening is enabled. (FireScreen checks for GATED, GATED_OLD, or ROUTED
in the /etc/rc.config file.) If gateway screening is not enabled, the FireScreen installation
updates your system configuration file to enable gateway screening.
The FireScreen installation then runs the doconfig program to make a backup copy of
your original system configuration file and to rebuild the kernel using the updated system
configuration file. The rebuilt kernel is then copied into place and you are asked to shutdown
and reboot the operating system.
6. Shut down or reboot the operating system. See Section 1.7: Accessing Web-Based System
Management Tools.
Figure 9-5 shows how the Install FireScreen page appears after successfully completing the
FireScreen installation when gateway screening was enabled in the kernel before installing
FireScreen. After you complete the FireScreen installation, you must configure FireScreen
(see Section 9.2.2: Configuring FireScreen).
9.2 FireScreen Administration 177