Draytek Vigor2920 Series User Manual page 49

When such page appears, you can enable or disable these services for your necessity.
Then, click Finish.
Note: The service will be activated and applied as the default rule configured in
Firewall>>General Setup.
6. Now, the web page will display the service that you have activated according to your
selection(s). The valid time for the free trial of these services is 30-day.
Later, if you need to extend the license valid time for the same service, you can also use the
Service Activation Wizard again to reach your goal by clicking the radio button of Formal
edition with license key and clicking Next.
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Vigor2920 Series User's Guide