In addition to the remote console and winbox, Mikrotik also provides a way to access the router via a web-base using a browser. The port used is the standard HTTP port, which is port 80, You can change the port or disable it when not in use.
# WWW (webfig) Port Enable
/ip service set www port=80 address=0.0.0.0/0 disabled=no
# WWW (webfig) Port Disable
/ip service set www port=80 address=0.0.0.0/0 disabled=yes
Credit: mikrotik.co.id