# Creating and Applying SSL Certificates for Webmin Admin Interface

## 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: nettools.i12bretro.local
   countryName: US
   stateOrProvinceName: Virginia
   localityName: Northern
   organizationName: i12bretro
   organizationUnitName: i12bretro Certificate Authority
   commonName: nettools.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 .pem extension and verify the export format is PEM + Key (*.pem)
4. Click OK

## Applying the Certificates

1. Download PuTTY Download
2. Connect to the Linux host via PuTTY
3. Install Webmin if it is not already installed
   `wget http://prdownloads.sourceforge.net/webadmin/webmin_1.941_all.deb
   sudo dpkg -i webmin_1.941_all.deb
   sudo apt-get -f install`
4. Copy the certificates exported above to the Linux device
5. Copy the certificates exported above to /etc/webmin
   cp /home/pi/Downloads/webmin.pem /etc/webmin
6. Open a web browser and navigate to Webmin via https://DNSorIP:10000
7. Login with the root username and password
8. Navigate to Webmin > Webmin Configuration > SSL Encryption
9. Click the browse button next to the Private key file field
10. Navigate to /etc/webmin and select the webmin.pem certificate
11. Make sure the certificate file is set to Same file as private key
12. Click the save button
13. Webmin will apply the certificate and restart
14. Close the web browser and relaunch using the DNS or IP address setup in the SSL certificate