Skip to main content

How do I resolve the error "Certificate Unknown" on a Plesk Server

User-added image
For Plesk Version 7

Issue:

When installing the Entrust SSL certificate, you may get the following error message:

Error: "404 not found"

Cause:

You may encounter the following error since the associated private key is not part of the certificate upload on the Plesk Administration interface.

Resolution:

To upload the Entrust Datacard server certificate to Plesk administration interface, the private key file must also be part of the upload file. Take your private key certificate file and the SSL certificate received from Entrust Datacard. Save the certificates in the following format: Private key on top and web server certificate at bottom.

For example:

-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

After merging the two certificate files together, your certificate will install correctly into Plesk.

If you have any questions or concerns please contact the Entrust Certificate Services Support department for further assistance:

Hours of Operation:
Sunday 8:00 PM ET to Friday 8:00 PM ET
North America (toll free): 1-866-267-9297
Outside North America: 1-613-270-2680 (or see the list below)
NOTE: Smart Phone users may use the 1-800 numbers shown in the table below.
Otherwise, it is very important that international callers dial the UITF format exactly as indicated. Do not dial an extra "1" before the "800" or your call will not be accepted as an UITF toll free call.

Country Number
Australia 0011 - 800-3687-7863
1-800-767-513
Austria 00 - 800-3687-7863
Belgium 00 - 800-3687-7863
Denmark 00 - 800-3687-7863
Finland 990 - 800-3687-7863 (Telecom Finland)
00 - 800-3687-7863 (Finnet)
France 00 - 800-3687-7863
Germany 00 - 800-3687-7863
Hong Kong 001 - 800-3687-7863 (Voice)
002 - 800-3687-7863 (Fax)
Ireland 00 - 800-3687-7863
Israel 014 - 800-3687-7863
Italy 00 - 800-3687-7863
Japan 001 - 800-3687-7863 (KDD)
004 - 800-3687-7863 (ITJ)
0061 - 800-3687-7863 (IDC)
Korea 001 - 800-3687-7863 (Korea Telecom)
002 - 800-3687-7863 (Dacom)
Malaysia 00 - 800-3687-7863
Netherlands 00 - 800-3687-7863
New Zealand 00 - 800-3687-7863
0800-4413101
Norway 00 - 800-3687-7863
Singapore 001 - 800-3687-7863
Spain 00 - 800-3687-7863
Sweden 00 - 800-3687-7863 (Telia)
00 - 800-3687-7863 (Tele2)
Switzerland 00 - 800-3687-7863
Taiwan 00 - 800-3687-7863
United Kingdom 00 - 800-3687-7863
0800 121 6078
+44 (0) 118 953 3088