The License Callback Mechanism

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Table of contents
Overview

Overview

The license callback mechanism immediately updates a server after the license changes in either Manage2 or the cPanel Store. It cannot make any changes to the server. It only alerts the server that a change as been made to the license.
Note:
At least one port in the following table must be open for the license callback mechanism to work. The server only accepts requests to this API from cPanel & WHM. The license system does not send any other information to the customer’s server.
The license callback mechanism tries the following ports until one succeeds:
Service
Port
Inbound
Outbound
cPanel
2082

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cPanel SSL
2083

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WHM
2086

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WHM SSL
2087

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Webmail SSL
2096

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The license callback mechanism uses the following IP addresses to perform the license check:
  • 208.74.121.0/24
  • 208.74.123.0/24
More:
For more information on how to configure your firewall for cPanel & WHM service, read our  documentation .