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How to secure a Plesk hostname on port 8443 with an SSL certificate with Plesk Onyx (Let's Encrypt / other certificate authorities)

Securing Plesk interface with an SSL certificate from other certificate authorities other than below - click above banner.

Question

How to secure a Plesk hostname on port 8443 with an SSL certificate (Let’s Encrypt / other certificate authorities)?

Answer

Securing Plesk interface with a free Let’s Encrypt certificate (Plesk Onyx)

  1. In Plesk, go to Extensions and search for Let’s Encrypt.
    Extensions_-_Let_s_Encrypt.png

  2. Click on Let’s Encrypt and then click “Get it free” (or “Install”).
    Screenshot_2019-03-26_Extensions_-_Plesk_Onyx_17_8_11.png

  3. Once installed, go to Tools & Settings > SSL/TLS Certificates (under Security ).
    Screenshot_2019-03-26_Tools_Settings_-_Plesk_Onyx_17_8_11.png

  4. Click Let’s Encrypt .
    Screenshot_2019-03-26_SSL_TLS_Certificates_-_Plesk_Onyx_17_8_11.png

  5. Make sure the Domain name and Email address fields contain a valid information:

  • Domain name can be a server hostname (preferable) or any other (sub)domain name hosted on the server. It will be used as an entry point to Plesk over port 8443 (for example, https://server.example.com:8443 ) for all Plesk users (customers, resellers, etc.) who have access to Plesk. Note: The hostname/domain name must be resolved to a public IP address of the Plesk server from the Internet. If in doubt, check your hostname/domain name availability using DNS Lookup by MxToolBox.

If a domain, e.g. example.com , is using permanent www redirection, specify www.example.com as Domain name .

  1. Click Install . At this stage, an SSL certificate from Let’s Encrypt is generated and set to secure Plesk on port 8443. This certificate will be auto-renewed every 90 days. Here is the final look:
    Screenshot_2019-03-26_SSL_TLS_Certificates_-Plesk_Onyx_17_8_11_1___1.png

Now, access Plesk over https://server.example.com:8443.

Known issues

Securing Plesk interface with an SSL certificate from other certificate authorities

Additional Information

Plesk Onyx 17.8 secures its hostname with a free Let’s Encrypt certificate automatically, if the Let’s Encrypt extension is installed and the hostname is a fully qualified domain name (FQDN) and is resolved from the Internet.

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