Easier to connect online

Many of my students cannot join each other's worlds in remote learning.  I understand this can be resolved by opening the port forwarding.  However this is not possible to do over every wifi network in developing countries and I cannot help all of my students set this up on their networks.  When I was living in the same country as my students I couldn't do it over my own network.  There must be some other way to get connected online since this is a lot easier through other video games in that same country.