When I try to upgrade to a new version, the unit reverts to the old version.

There can be combinations of settings that become invalid in the new version. Almost every new version comes with a whole set of new error checks, which means that your valid old configuration can be an invalid configuration with the new version.

The first step is to read through the release note to see if any new error checkers were introduced, and to read the upgrade instruction for the upgrade. Hopefully you find the setting there.

If you don't, or if you think this takes too much time, this is a workaround for almost any such upgrade issue:

• Make a backup of your configuration (as a backup database or CLI file).
• Load the Factory configuration.
• Set an IP address for the Ingate box.
• Go to the Access Control page and select a configuration address for your Ingate box. Also add your workstation as a Configuration Computer.
• Apply the new configuration.
• Upgrade to the new version.
• Load the backup configuration again and correct the invalid settings.
• Apply the configuration.

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