Enable Authentication Using a Certificate Profile

The following workflow shows how to enable authentication for strongSwan clients using a certificate profile.
  1. Configure an IPSec tunnel for the GlobalProtect gateway for communicating with a strongSwan client.
    1. Select NetworkGlobalProtectGateways and then select the gateway name.
    2. Select the Certificate Profile you want to use for authentication in the Authentication tab.
    3. Select AgentTunnel Settings and specify the following settings to set up a tunnel:
      • Select the check box to Enable X-Auth Support.
      • If a Group Name and Group Password are already configured, remove them.
      • Click OK to save the settings.
  2. Verify that the default connection settings in the conn %default section of the IPSec tunnel configuration file (ipsec.conf) are correctly defined for the strongSwan client.
    The ipsec.conf file is usually found in the /etc folder.
    The configurations in this procedure are tested and verified for the following releases:
    • Ubuntu 14.0.4 with strongSwan 5.1.2 and CentOS 6.5 with strongSwan 5.1.3 for PAN-OS 6.1.
    • Ubuntu 14.0.4 with strongSwan 5.2.1 for PAN-OS 7.0.
    The configurations in this procedure can be used for reference if you are using a different version of strongSwan. Refer to the strongSwan wiki for more information.
    Modify the following settings in the conn %default section of the ipsec.conf file to these recommended settings.
  3. Modify the strongSwan client’s IPSec configuration file (ipsec.conf) and the IPSec password file (ipsec.secrets) to use recommended settings.
    The ipsec.secrets file is usually found in the /etc folder.
    Use the strongSwan client username as the certificate’s common name.
    Modify the following items in the ipsec.conf file to these recommended settings.
    conn <connection name> 
    leftcert=<client certificate with the strongSwan client username used as the certificate’s common name> 
    Modify the following items in the ipsec.conf file to these recommended settings.
    <private key file> “<passphrase if used>”
  4. Start strongSwan IPSec services and connect to the IPSec tunnel that you want the strongSwan client to use when authenticating to the GlobalProtect gateway.
    Use the config <name> variable to name the tunnel configuration.
    • Ubuntu clients:
      ipsec start  
      ipsec up <name> 
    • CentOS clients:
      strongSwan start 
      strongswan up <name> 
  5. Verify that the tunnel is set up correctly and the VPN connection is established to both the strongSwan client and the GlobalProtect gateway.
    1. Verify the detailed status information on a specific connection (by naming the connection) or verify the status information for all connections from the strongSwan client:
      • Ubuntu clients:
        ipsec statusall [<connection name>]
      • CentOS clients:
        strongswan statusall [<connection name>]
    2. Select NetworkGlobalProtectGateways. Then, in the Info column, select Remote Users for the gateway configured for the connection to the strongSwan client. The strongSwan client should be listed under Current Users.

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