To install the public-signed wildcard certificate, perform the following steps:
Log in to NetScaler Gateway and navigate to Traffic Management | SSL. Navigate to Manage Certificates / Keys / CSRs and click on Upload… to upload the certificate to NetScaler Gateway, as shown in the following screenshot:
Navigate to Traffic Management | SSL | Certificates. Click on Install….
Create a new Certificate-Key Pair Name. Use the newly uploaded certificate. Use the key file created for the certificate request. Use PEM as the Certificate Format, enter the key's password, and click on Create, as shown in the following screenshot: