安装Create and Apply SSL Certificates to OPNSense Web UI

Prerequisites

• A XCA PKI database https://youtu.be/ezzj3x207lQ

Create Your SSL Certificate

1. Launch XCA
2. Open the PKI database if it is not already (File > Open DataBase), enter password
3. Click on the Certificates tab, right click on your Intermediate CA certificate
4. Select New
5. On the Source tab, make sure Use this Certificate for signing is selected
6. Verify your Intermediate CA certificate is selected from the drop down
7. Click the Subject tab
8. Complete the Distinguished Name section

   internalName: fw.i12bretro.local
   countryName: US
   stateOrProvinceName: Virginia
   localityName: Northern
   organizationName: i12bretro
   organizationUnitName: i12bretro Certificate Authority
   commonName: fw.i12bretro.local

9. Click the Generate a New Key button
10. Enter a name and set the key size to at least 2048
11. Click Create
12. Click on the Extensions tab
13. Select End Entity from the type list
14. Click Edit next to Subject Alternative Name
15. Add any DNS or IP addresses that the certificate will identify
16. Update the validity dates to fit your needs
17. Click the Key Usage tab
18. Under Key Usage select Digital Signature, Key Encipherment
19. Under Extended Key Usage select Web Server and Web Client Authentication
20. Click the Netscape tab
21. Select SSL Server
22. Click OK to create the certificate

Exporting Required Files

1. In XCA, click on the Certificates tab
2. Right click the SSL certificate > Export > File
3. Set the file name with a .crt extension and verify the export format is PEM (*.crt)
4. Click OK
5. Click the Private Keys tab
6. Right click the private key generated for the SSL certificate > Export > File
7. Set the file name with a .pk8 extension and verify the export format is PKCS #8 (*.pk8)
8. Click OK

Applying the Certificates

1. Log into the OPNSense web UI
2. Click System > Trust > Certificates in the left navigation
3. Click the Add button at the top right
4. Set the Method to Import an existing Certificate
5. Set the Name to Web UI SSL
6. Open the .crt file exported earlier in Notepad, copy the contents to the Certificate data field
7. Open the .pk8 file exported earlier in Notepad, copy the contents to the Private key data field
8. Scroll down to the bottom of the page and click Save
9. Click System > Settings > Administration in the left navigation
10. Select HTTPS for the Protocol
11. Select Web UI SSL from the SSL Certificate dropdown
12. Scroll down to the bottom of the page and click Save
13. Wait a few seconds for the Web UI to restart and click the https:// link