How to Enable/Disable SSL for Webmin Control Panel
How to Disable SSL for Webmin Miniserv
Login to webmin control panel by typing the below URL. “YourServerIP” should be replaced with IP address of your Server.
Link to access webmin control panel : https://YourServerIP:10000
OR
https://YourHostname:10000
Enter server root login details to access webmin control panel.
Server Username : root
Server Password : Enter Server root password
On the left side Click on “Webmin Configuration” under “Webmin”. Check the below screenshot

Disable SSL encryption webmin
Click on “SSL Encryption” under “Webmin Configuration” like shown in the picture

Disable SSL Webmin
Under “SSL support” change “Enable SSL” option to “No”. Click on “Save” after changing “Enable SSL” option to “No”
Webmin >> Webmin Configuration >> SSL Encryption >> SSL Settings >> SSL support >> Enable SSL – No

You can do the same from server backend by editing the /miniserv.conf file like shown in the below picture. Log into your linux server via SSH as root. Edit the file /etc/webmin/miniserv.conf using vi editor and change the line “ssl=1” to “ssl=0”. Changing ssl=0 will disable SSL encryption for webmin.

Disable SSL Encryption for Webmin from Backend
How to Enable SSL for Webmin Miniserv
Changing “ssl=1” in /etc/webmin/miniserv.conf will enable SSL encryption for webmin.
OR
Login to webmin and do the below to Enable SSL.
Webmin >> Webmin Configuration >> SSL Encryption >> SSL Settings >> SSL support >> Enable SSL – Yes