Creating Certificates from an Existing Root Certificate

With UMS 6.03 or higher, you can use the ICG remote installer for installing and creating certificates. This procedure is described here. For the procedure with UMS 6.02 or lower, see How to Create Certificates from an Existing Root Certificate.

Required Certificate Files

The following files are required:

• CA certificate

• CA private key

  

  If you need to export the CA signing root certificate and key from a Microsoft CA server, you can follow this document from Cisco: How do I export and convert a pfx CA root certificate and key from a Microsoft CA server

Importing Your Existing Private CA Files into the UMS

1. In the UMS Console, go to UMS Administration > UMS Network > IGEL Cloud Gateway.
   

2. In the toolbar in the upper right, click the  icon (Install new IGEL Cloud Gateway).
   

3. The ICG remote installer opens. Any existing ICG certificates are shown in the Certificates area.  
   

4. Click  to import the root certificate.
   

5. Choose the CA's root certificate file (PEM format) and click Open.

   

   
   The CA's root certificate appears on the list.

   

6. Select the CA certificate and click  to import the decrypted private key for the CA certificate.

   

   

   If the private key is protected with a passphrase, you need to decrypt it using the OpenSSL command line tool: openssl rsa -in encrypted.key -out decrypted.key

7. Choose the decrypted private key file for the CA certificate and click Open.

   

   
   If everything went well, a success message is shown.
   

   

8. Continue by creating a signed certificate.

Creating a Signed Certificate

1. Select the CA's root certificate and click  to create a signed certificate.

   

2. Fill in the certificate fields:

   • Display name: Name of the certificate

   • Your first and last name: Name of the certificate holder

   • Your organization: Organization or company name

   • Your city or locality: Location

   • Your two-letter country code: ISO 3166 country code, e.g. US, UK or ES

   • Hostname and/or IP address of certificate target server: Hostname(s) or IP address(es) for which the certificate is valid. Multiple entries are allowed, separated by semicolons.

   

   All IP addresses and hostnames by which the ICG will be reachable from within the company network or from outside must be provided here.
   
   

   • Valid until: Local date on which this certificate expires. (Default: one year from now)

   • Certificate Type: Select "End Entity".
     

3. Click OK.

   

   
   A key pair and a certificate are generated.

   

   Generating keys may take substantial time on virtual machines (VMs), as these do not have a powerful (pseudo) random number source. On Linux VMs, this can be improved by installing the haveged package.

   The signed certificate appears on the list.
   

   

4. Continue with Installing the IGEL Cloud Gateway.