|You system specs show Linux x86_64, but while you mentioned Internet Explorer, I assume, your son's computer is running Windows (whatever version is running).|
You may try starting simple, to figure out, what's working and what's not.
Therefore, first, open CMD (command prompt) and type in:
You should get a list of hops through all the routers and gateways passing the way from your computer to google.com. Post the result of the output here.
If this doesn't work, post back the output of ipconfig /all, which must also be typed in, at the command prompt.