M2Web HTTP Port 443 and 491

I’m trying to access a webserver with M2Web but it has to be open ports 491 and 443, on the HTTP or HTTPS there is the possibility to add one port only, how can I open the other one?

Add the LAN device in the eWON’s Properties section in eCatcher, select All Protocols and select the port that should be used to access the webpage (you can only specify one, but the other ports will be open as well):