Mikrotik Port Service WWW-SSL 443 Webfig - MikroTik Script RouterOS
Just like the WWW service that allows router access using a web-base, however, www-ssl is more secure because it uses SSL certificates to establish a connection between the router and the remote client. By default use port 443, you can change the port or disable it when not in use.
# WWW-SSL (webfig) Port Enable
/ip service set www-ssl port=443 address=0.0.0.0/0 disabled=no
# WWW-SSL (webfig) Port Disable
/ip service set www-ssl port=443 address=0.0.0.0/0 disabled=yes
Credit: mikrotik.co.id