If you have already obtained a certificate containing private key and certificate part (and may be CA certificate), follow these steps to upload it:

1. At the certificate repository page, click on the ADD button. You will be taken to the SSL certificate creation page.
2. In the Upload certificate files section of the page, use the Browse button to locate the appropriate certificate file or a required certificate part.
3. Click SEND FILE. This will upload your certificate parts to the repository.

You can upload an existing certificate in two ways:

1. Choose a file from the local network and click on the SEND FILE button (.TXT files only).
2. Type in or paste the certificate text and private key into the text fields and click on the SEND TEXT button.

Uploading a CA certificate

For the ComodoSecurityServicesCA.crt is the CA Certificate, or rootchain certificate. The CA Certificate is used to appropriately identify and authenticate the certificate authority, which has issued your SSL certificate. To upload your CA Certificate, follow these steps:

1. At the certificate repository page, select a certificate from the list. You will be taken to the SSL certificate properties page.
2. Use the Browse button, within the section related to the certificate uploading, to locate the appropriate CA Certificate file.
3. Click SEND FILE. This will upload your CA Certificate to the repository.

You can upload an existing certificate in two ways:

1. Choose a file from the local network and click on the SEND FILE button (.TXT files only).
2. Type in or paste the CA certificate text into the text field and click on the SEND TEXT button.

NOTE: When you add a certificate, it is not installed automatically onto the domain or assigned to an IP address, but only added to the Certificate repository. You can assign a certificate to an IP address at the Client's IP pool, at the IP aliasing management page, and during hosting creation on an exclusively granted IP.