Creating and Applying SSL Certificates for Webmin Admin Interface
4#Webmin #SSL #HTTPS
Full steps can be found at https://i12bretro.github.io/tutorials/0118.html
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Prerequisites
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- A XCA PKI database https://youtu.be/ezzj3x207lQ
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Create Your SSL Certificate
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01. Launch XCA
02. Open the PKI database if it is not already (File ≫ Open DataBase), enter password
03. Click on the Certificates tab, right click on your Intermediate CA certificate
04. Select New
05. On the Source tab, make sure Use this Certificate for signing is selected
06. Verify your Intermediate CA certificate is selected from the drop down
07. Click the Subject tab
08. 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
09. 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
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Exporting Required Files
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01. In XCA, click on the Certificates tab
02. Right click the SSL certificate ≫ Export ≫ File
03. Set the file name with a .pem extension and verify the export format is PEM + Key (*.pem)
04. Click OK
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Applying the Certificates
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01. Download PuTTY https://www.chiark.greenend.org.uk/~sgtatham/putty/latest.html
02. Connect to the Linux host via PuTTY
03. 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
04. Copy the certificates exported above to the Linux device
05. Copy the certificates exported above to /etc/webmin
cp /home/pi/Downloads/webmin.pem /etc/webmin
06. Open a web browser and navigate to Webmin via https://DNSorIP:10000
07. Login with the root username and password
08. Navigate to Webmin ≫ Webmin Configuration ≫ SSL Encryption
09. 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
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