Cpanel Licence verification & reinitialisation

Please refer to the following link to confirm that the CPanel License is active:
http://layer1.cpanel.net/verify/index.cgi?ip=server_ip

Try running the program /usr/local/cpanel/cpkeyclt
to re-initialize the license again if you encounter any other licensing errors.

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Please also check the following as one of it might be the case for invalid Lic. for Cpanel/WHM

1. Is the license expired?
2. Is the server's hostname a fully qualified domain name?
has address xxx.xxx.xxx
3. Does the server's hostname resolve locally and remotely?
4. Does cpkeyclt report a problem?
5. Is there a firewall blocking connections to the licensing server?
6. Is the license IP address bound directly to the interface and not an IP alias?
7. Does the licensing server think the server's query is coming from the proper IP address?