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External Certificate Authority

The External Certificate Authority (CA) feature is for large enterprises and government customers who deploy an on-premise Orchestrator and have a requirement to use their own certificate authority (CA) rather than the default self-signed Orchestrator certificate authority. This section covers how to enable and configure External CA.

When External CA is configured, instead of the Orchestrator receiving a certificate signing request (CSR) and issuing the device certificates itself, the Orchestrator is required to pass the CSR to an external CA for issuance of the certificate. The device certificate will be returned to the Orchestrator and sent to the Edge or Gateway.

A customer using this feature would be expected to have deployed a commercial certificate authority, for example from PrimeKey (EJBCA PKI), or in some cases, may have implemented their own proprietary CA.

Beginning with Release 5.1.0, an Orchestrator where external CA is activated may be configured with two new API-ready modes:
  • Manual Mode provides support for any certificate authority and provides flexibility and control with the user manually performing each step in the certificate process.
  • Asynchronous Mode provides support for any certificate authority with the ability to script the manual steps and automating the recurring tasks.

These modes are added to Synchronous or Automated Mode, which was the first mode introduced in Release 4.3.0. With Synchronous mode, the Orchestrator integrates directly with an external CA (which, for Release 4.3.0 and forward, offered PrimeKey EJBCA PKI as the only available external certificate authority) and through REST APIs for certificate request, renewal, and revocation.

Limitations:
  • External CA can only be enabled on an On-Premise Orchestrator managed by a single customer. This feature is not available on Orchestrators hosted by Arista.
  • On an Orchestrator using Release 3.4.0 up to 5.0.0, this feature can only use PrimeKey EJBCA PKI as an external CA.

Enable External CA

The External CA feature is enabled through two System Properties. Enabling these system properties may only be done by an Operator with a Superuser role.

The first system property that must be enabled is ca.external.configuration. This property is manually created with a JSON data type and the JSON is populated consistent with the example seen below in the Sample External CA Configuration section.

Only after ca.external.configuration is created and enabled, should the Operator enable the second system property: ca.external.enable.

  1. On the Orchestrator UI, select System Properties.
  2. Using the search box on the System Properties page enter ca.external.enable as shown in the images below.
    Figure 1. System Properties
  3. Once the ca.external.enable property is located, either select on that property or check the box and select Edit.
  4. Change the ca.external.enable property to True and select Save Changes to complete the change as shown in the image below.
    Figure 2. Modify System Property
    The System Property page displays a confirmation that the property was successfully modified, and will now show that ca.external.enable is True.
    Figure 3. System Property Modified

Configure External CA

Having activated the External CA System Property, the Operator can now select on Orchestrator > Certificate Authorities to begin configuring an external certificate authority.
Figure 4. Certificate Authorities
Configuring External CA can be done using one of three modes:
  1. Automated (Synchronous): With Automated mode, only one external certificate authority is supported: PrimeKey EJBCA PKI.
  2. Manual: Manual mode provides support for any certificate authority and provides flexibility and control with the user manually performing each step in the certificate process.
    Figure 5. Manual Mode
  3. Asynchronous: Asynchronous mode provides support for any certificate authority with the ability to script the manual steps while automating the recurring tasks.
    Figure 6. Asynchronous Mode
  1. On the Orchestrator > Certificate Authorities page, select on + Additional CA.
  2. After selecting + Additional CA, the UI will change to CA Type with a drop down menu with the options of Intermediate CA and External CA. Select on External CA.
    Figure 7. CA Type
  3. Once External CA is selected, the screen changes to the Add External CA screen where an Operator can choose between the three previously mentioned External CA Modes: Automated (Synchronous), Asynchronous, and Manual.
    Figure 8. External CA Mode
  4. Having selected a CA Mode, the Add External CA screen changes to allow additional configuration of the external CA. This is where the Operator would paste in the CA Root Certificate.
    By checking the box for Activate VCO to poll for CRL, the Operator elects to have the Orchestrator to conduct certificate revocation checks using the Certificate Revocation List (CRL). If this option is checked, two additional configuration parameters appear to be configured by the Operator:
    1. CRL Poll Interval in Minutes determines how often in minutes the Orchestrator will conduct certificate revocation checking against the latest CRL.
    2. CRL Distribution Point is the URL where the Orchestrator retrieves the latest CRL.
      Figure 9. Add External CA
  5. Once the Operator has filled out all the required fields, they would select Save.
  6. Once an external CA is configured the Operator will have newly available options to Import CRL and Download CRL.
    Figure 10. Import CRL

     

    Figure 11. Download CRL

    Using Import CRL while also having Orchestrator CRL Polling configured, an Operator can perform batch or individual imports and exports.

    Figure 12. Import CRL

    The CRL would perform a validation after any import of your certificates, and the Orchestrator distributes your CRL to every Edge and Gateway connected to your Orchestrator.

    Note:
    • There is a third System Property: ca.external.caCertificate. This System Property will appear once External CA is enabled and there is connectivity to a valid external CA. This property requires a PEM (privacy enhanced mail) encoded certificate.
    • Edge/Gateway generated Certificate Sign Request (CSR) has only a Common Name (CN). While signing the CSR, the External CA adds the required subject.

Sample External CA Configuration

This section provides an example of a configuration for the ca.external.configuration field.

{ "integrationType": "SYNCHRONOUS", "csrDistinguishedName": { "CN_PID_SN": "VMWare-SDWAN" }, "synchronous": { "synchronousIntegrationType": "EJBCA", "ejbca": { "serverCaCertificate": "-----BEGIN CERTIFICATE-----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\n+kEK69DlZRNudn4=\n-----END CERTIFICATE-----", "apiCertificate": "-----BEGIN CERTIFICATE-----\nMIIEKzCCApOgAwIBAgIUM83EYfZz4vi4ty1EOJr+n6wMksAwDQYJKoZIhvcNAQEL\nBQAwgZIxIzAhBgoJkiaJk/IsZAEBDBNyLTA1OTVhMTNjMTUzZDc2YWU1MRUwEwYD\nVQQDDAxNYW5hZ2VtZW50Q0ExHjAcBgNVBAsMFWFtaS0wMmE0NDc0YzFmNzQ5NDBh\nODE0MDIGA1UECgwraXAtMTAtODEtMTI1LTEzMi51cy13ZXN0LTIuY29tcHV0ZS5p\nbnRlcm5hbDAeFw0yMTAyMDUwMDA1MTRaFw0yNjAyMDUwMDA1MTNaMBUxEzARBgNV\nBAMMClN1cGVyQWRtaW4wggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQC/\nrPdG0oY89GGUgHbV9iG3n3Y1mPBmQ+iVBvKYD3YpM7fG+KnVQTdJLrYoH5vP7lVY\nQj9H6pjxq0Bh53Mse2Fl9UE/Gew6IZiRd2OK9yM1xRKH7hjPB3tqFlA98mar+BYA\nGPhapmq+sSFz6TS2ssToUllG8QgJeMxh6+vSP/Ca9O+HiDB7TqECufVv6lrL7sfK\nqfyQ5YzITKm7IGDQfdCiorwndvd1i1NB+vviiYsk1fEW8gvRUu7wMRlzmPwxnUxd\nKmb/b7+O65md7+FlkqU6EzYMQ/224ZJonwJfzmNTO1AGt4aaJDNKn1i5wV22xqqQ\nZvA6nrkBd+06pUwVTen1AgMBAAGjdTBzMAwGA1UdEwEB/wQCMAAwHwYDVR0jBBgw\nFoAUafBBZNWmFvrP7cHjlMLl4f8bjCcwEwYDVR0lBAwwCgYIKwYBBQUHAwIwHQYD\nVR0OBBYEFFj+bk/epA/jPXZywy1D4XV5sWlMMA4GA1UdDwEB/wQEAwIF4DANBgkq\nhkiG9w0BAQsFAAOCAYEARNN08PUMCAWI+wLpu4FRuApRJrWn7U07D2ZDirV5a7pq\nICCbREe34EYmbLyqdUCMHS8xJlPun5ER3E5YFzckC7wJ9y2h8giB7O3cjx/wWkax\nNEkz/Is634XZveIRNf1TmV9/71LnfUBDJjHYFPNzyw6CBtVn/niL1Q9o3SvbbZLQ\nCcdcpFm1rxku0UOuCaQgOSuLn5nqTFCNi4Sx40shg8wDrc1AUuv+yX09dM2G+27h\ndCJrkqHwbtWQMY2sOBdTIq6TMyJyrsvTCTQ67vqRtdJuSqOw/CnPnSo2/lSrkNWC\nIl7mQzq6+2ayQBxsm6xuHXD0INoRB+flq/QhY+CQIaTLYLezVITo0bZhe0TpNqYK\nlINUWjxI8mCBBiXZZ9zxbyOqzZouZcNH12OCEqU8alTfyW0EpGYClemRTgXxboDK\n+uEwKH6sngYMkG0Usni4WIKBvZV2dJa5o8RhuCUFhwBJ2aHuiTq86RLrazJBE3wA\nGvpl0ZmGVYmond3aBOYu\n-----END CERTIFICATE-----", "apiKey": "-----BEGIN PRIVATE KEY-----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\nSNV2aPx+2+DGSZEVbuLXviHs\n-----END PRIVATE KEY-----", "host": "ip-10-81-125-132.us-west-2.compute.internal", "port": "443", "distinguishedName": "UID=r-0595a13c153d76ae5,CN=ManagementCA,OU=ami-02a4474c1f74940a8,O=ip-10-81-125-132.us-west-2.compute.internal", "certificateProfile": "ENDUSER", "endEntityProfile": "EMPTY" } } }

Monitoring External CA:Monitoring certificates is done on the same Orchestrator > Certificate Authorities page.

The Certificates Summary page provides an Operator with a visual status of key indicators for their certificates' life cycle. The Operator would also import certificates and download CSRs in this section.

Figure 13. Certificates Summary

In the Certificates section, the Operator can download a complete list of all Edge or Gateway certificates in the .csv format.

Figure 14. Certificates

An Operator, Partner, or Customer administrator can also examine a particular Edge's certificate by navigating to Configure > Edge > Overview .