I am trying to connect to my computer in laboratory from home. I have installed Remmina on my laptop home and X11VNC server on the computer in the lab. When I have the laptop in the laboratory I can connect, but when I try it from home I cannot. I do not get any diagnostic messages, just "connection failed".
I figured out that the problem could be that the laboratory network is behind a firewall that prevents the connection from outside the LAN. I have read the documentation on X11VCN and firewalls on:
But, I have no experience with computer networks, so I do not understand what is written there. I tried to learn it by googling the terms I do not understand, but each one leads to many more things I do not understand.
Please could you help me in any way? If there is no simple answer to my question (such as run these commands), could you at least point me to some useful literature or tutorial? I may have to build my knowledge from scratch, since I have no understanding of the most basic concepts such as "port", but learning from Wikipedia seems very confusing.
EDIT: Looking at the comments under How to control an Ubuntu PC from another Ubuntu PC over Internet, using mobile broadband connections? I realized that the IP adresses given in the System settings and the one given by entering "IP address" into Google are not the same. I was using the one given by system settings. I will also try the one given by Google