Your father could be anywhere and enjoy listening from... anywhere? :-)
For radios that don't have a network interface, RemoteRig sells a box that will network-enable most radios, either via PC control or using a detached control panel: https://www.remoterig.com/wp/?page_id=362
There's also no lack of ways to homebrew this using a RaspberryPi and the right cables: https://rigpi.net/
(FlexRadio also makes some very impressive programmable SDR radios that are entirely network controlled, if you were buying new equipment. Amazing gear, not cheap though.)
http://www.w1hkj.com/W3YJ/Remote_Article.pdf
But you can use whatever old PC you can dig up rather than a raspberry pi.
My dad is a ham radio operator and uses this to use his equipment remotely. Your can run your own server and connect to it or use ones that other people make public (though some of them you need to be part of a radio club for)