Before You begin

To retain your existing SunScreen configuration files, you must take special care when upgrading to SunScreen 3.1. Do not remove your existing software packages unless you are instructed to do so.

The order in which you do the installation for the upgrade software is different from an initial installation. First, you install the upgrade software on the Screen and then on the Administration Station. This order prevents damage to the existing configurations and makes it easier to communicate between the Administration Station and the Screen.

Since SunScreen 3.1 uses ordered packet filtering rules and ordered NAT mappings, you must review your packet filtering rules after the upgrade is complete to verify the filtering order. Be aware that NAT mappings in SunScreen 3.1 are different from NAT mappings in earlier releases. Please see the SunScreen 3.1 Reference Manual for details on NAT mappings.

Before installing, review the SunScreen 3.1 Release Notes for the latest information about this product.