Cannot install license key: cURL cannot communicate with license server

Created:

2017-06-12 18:33:39 UTC

Modified:

2017-08-16 16:22:17 UTC

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Cannot install license key: cURL cannot communicate with license server

Applicable to:

  • Plesk for Windows
  • Plesk for Linux

Symptoms

  • License installation fails with the following error:
    Error: cURL cannot communicate with license server https://id-00.kaid.plesk.com:5224/ (): Couldn't connect to server(7)
    cURL cannot communicate with license server https://id-00.kaid.plesk.com:5224/ (): Couldn't resolve host name(6)
  • Cannot telnet to ka.plesk.com:
    # telnet ka.plesk.com 5224
    Trying 195.214.233.80...
    telnet: Unable to connect to remote host: Connection refused

Cause

Firewall is blocking the connection.

Resolution

Make sure that both incoming and outgoing traffic is allowed over port 5224.

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