Installing an intermediate certificate is simple to do through the WUI. First, obtain the intermediate certificate from the CA. This can usually be found on their web site, and is usually in a text window to make it easier to cut and paste.

Note: Your CA vendor may have provided the required intermediate certificates in the same bundle as the certificate itself, and so these would be installed together. The method documented in this section should be used when you are installing one or more intermediate certificates alone.

The intermediate certificate formats that are officially supported by the LoadMaster are: .PEM, .CER, and .CRT.

A CER file can only be encoded and exported in Base-64 format for it to be uploaded 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.

This section provides steps on how to apply and upload intermediate certificates and how to resolve any invalid certificate formats.

To import an intermediate certificate to the LoadMaster complete the following steps:

  1. Navigate to Certificates & Security > Intermediate Certs in the main menu.

  2. Click Choose File.
  3. Browse to and select the required intermediate certificate file.
  4. Enter the Certificate Name. This name is used on the LoadMaster to help you manage your certificates.
  5. Click Add Certificate.
  6. Click OK.

These intermediate certificates do not need to be associated with any Virtual Service certificates. The LoadMaster automatically builds the required certificate chain.

Also, only one intermediate certificate is required per CA. If several certificates have been installed from VeriSign, for instance, you only need to install the VeriSign intermediate certificate once.