Using trusted certificates on Synergis™ units - Synergis™ Softwire 11.3.4

The authenticity of the self-signed certificate that comes with the unit by default is not enforced as usual with the Public Key Infrastructure. To be more secure, you can use a fully trusted certificate signed by a certificate authority instead.

1. Log on to the Synergis™ unit.
2. Click Configuration > Certificates.
3. In the Certificate management section, complete the identification fields.
   The Common name field contains the unit's hostname by default. The Subject alternative name field also contains the hostname by default, but can be edited to a comma-separated DNS list.

   NOTE: The Common name, Subject alternative name, and Country fields are mandatory.

   
4. From the Certificate type list, select one of the following algorithms and key lengths:
   • ECDSA 256 bits
   • ECDSA 384 bits
   • RSA 2048 bits
   • RSA 3072 bits
   • RSA 4096 bits
5. Click Create certificate signing request.
   A .req file is generated, containing the public portion of the certificate. The file does not contain the private key and is therefore not confidential.
6. In Windows File Explorer, navigate to your Downloads folder, and then copy the signing request .req file and send it to a certificate authority.
   After verification, the certificate authority signs the public portion of the certificate with its own private key.
7. After you receive the certificates from the certificate authority, import the signed certificate.
   1. Log back on to the unit and click Configuration > Certificates.
   2. In the Import signed certificate section, click Select certificate and browse to the folder with the certificates.
   3. Select the first certificate and click Upload. Repeat for the remaining certificates.
      NOTE: Each certificate in the certificate chain must be uploaded individually, or in one operation if you received a .p7b collection file. If you received the collection file, you can omit uploading the root certificate.