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Unable to activate Plesk license: Make sure that connections to the license server ka.plesk.com on TCP port 443 are not blocked

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Alexander Davydov
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Plesk for Linux kb: technical

Applicable to:

  • Plesk for Linux

Symptoms

Unable to activate Plesk license with the below error:

PLESK_ERROR: Could not update the license. Make sure that connections to the license server ka.plesk.com on TCP port 443 are not blocked. See how to do so.

Cause

Only internal/private name server is specified in /etc/resolv.conf file.

Resolution

  1. Connect to the server via SSH.

  2. Add public name server to the /etc/resolv.conf file using text editor:

    CONFIG_TEXT: nameserver 8.8.8.8

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