Please follow these instructions to install your SSL certificate on WatchGuard Firebox X Edge:
Note: Local certificates must include an unencrypted private key in the certificate file to operate correctly.
1. Once you received your SSL certificate by e-mail, please copy and paste it into a text file and save the file with the .crt extension. (Include the tags -----BEGIN CERTIFICATE----- and -----END CERTIFICATE-----).
2. From the System Status page on the Firebox X Edge, go to Administration > Certificates.
3. Next to the certificate you want to add, click Import.
4. Select the second radio button and click Browse to select the certificate file (from step 1).
5. Click Import.