If you follow the steps to upload an intermediate certificate to the LoadMaster and receive a Certificate Format Invalid error, it means the certificate file you are trying to upload is unsupported or is not in one of the formats required by LoadMaster (PEM, CER, CRT).

The standard PEM file format can be uploaded to the LoadMaster.

A CER file is used to store an X.509 certificate. A CER file can only encoded and exported in Base-64 format to upload to the LoadMaster. A CER file exported in a DER Binary format is not supported on the LoadMaster and the LoadMaster is unable to upload this format.

To convert a CER file into a PEM format, you can use an SSL Converter Tool, such as this one: SSL Converter.

Follow these steps to convert a certificate using the SSL Converter Tool:

  1. Go to the following link: SSL Converter.
  2. Browse to and select the Certificate File to Convert.
  3. Select the current format type of the selected certificate file.
  4. Select Standard PEM in the Type to Convert To drop-down list.
  5. Click Convert Certificate.

You can upload this file format to the LoadMaster.