# Assigning a certificate to Secure Gateways and HALBs After you add a certificate to a Site, you can assign it to a RAS Secure Gateway, HALB, or both depending on the usage type that you specified when you created the certificate (described in the beginning of this chapter). More on the certificate **Usage** option below. ## **Certificate usage** Certificate **Usage** is an option that you specify when you create a certificate. It specifies whether the certificate should be available for RAS Secure Gateways, HALB, or both. When setting this option, you can choose from the following: * **Secure Gateway**: If selected, makes the certificate available for RAS Secure Gateways. * **HALB**: If selected, makes the certificate available for HALB. You can select one of the options above or both, in which case the certificate becomes available for both, Gateways and HALB. For details on how to create a certificate and choose these options, please see [Generating a self-signed certificate](/landing/ras-admin-guide/v20-en-us/parallels-ras-20-administrators-guide/ssl-certificate-management/generating-a-self-signed-certificate.md) and [Generating a certificate signing request (CSR)](/landing/ras-admin-guide/v20-en-us/parallels-ras-20-administrators-guide/ssl-certificate-management/generating-a-certificate-signing-request-csr.md). When you configure SSL for a RAS Secure Gateway or HALB later, you need to specify an SSL certificate. For the information on how to do this, please see [SSL/TLS encryption](/landing/ras-admin-guide/v20-en-us/parallels-ras-20-administrators-guide/ras-secure-gateway/configuring-a-ras-secure-gateway/ssl-tls-encryption.md) and [Configuring HALB in the RAS Console](/landing/ras-admin-guide/v20-en-us/parallels-ras-20-administrators-guide/load-balancing-and-halb/high-availability-load-balancing-halb/adding-a-halb-virtual-server.md). When you select a certificate, the following options will be available depending on how the **Usage** option is configured for a particular certificate: * **\**: This is the default option, which is always available. It means that any certificate on which the **Usage** selection matches the object type (Gateway or HALB) will be used. For example, if you are configuring a Gateway and have a certificate that has **Usage** set to "Gateway", it will be used. If a certificate has both, Gateway and HALB usage options selected, it can also be used with the given gateway. This works the same way for HALB when you configure the LB SSL Payload. Please note that if you select this option for a Gateway or HALB, but not a single matching certificate exists, you will see a warning and will have to create a certificate first. * Other items in the **Certificates** drop-down list are individual certificates, which will or will not be present depending on the certificate's **Usage** settings. For example, if you configure LB SSL Payload for HALB and have a certificate with the **Usage** option set to "HALB", the certificate will appear in the drop-down list. On the other hand, certificates with **Usage** set to "Gateway" will not be listed. As another example, if you need just one certificate, which you would like to use for all of your Gateways, you need to create a certificate and set the **Usage** option to "Gateways". You can then configure each Gateway to use this specific certificate or you can keep the default **\** selection, in which case the certificate will be picked up by a Gateway automatically. Same exact scenario also works for HALB. ## **Gateways** To assign a certificate to a RAS Secure Gateway: 1. Navigate to **Farm** > **Site** > **Secure Gateways**. 2. Right-click a gateway and choose **Properties**. 3. Select the **SSL/TLS** tab. 4. In the **Certificates** drop-down list, select the certificate that you created. 5. Click **OK**. Please note that you can also select the **\** option, which will use any certificate that either has the usage set to Gateway or both Gateway and HALB. ## **HALB** To assign a certificate to a HALB, navigate to **Farm** > **Site** > **HALB**. Assuming that your HALB is enabled and configured, and the **LB SSL Payload** option is selected, follow the instructions below: 1. Click **Configure** next to the **LB SSL Payload** option. 2. A certificate must be used when the **Mode** option is set to **SSL Offloading**. Once again, assuming it is selected, continue to the next step. 3. Click **Configure**. 4. In the **SSL** dialog, select the certificate in the **Certificates** drop-down list. 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