Just wanted to know please if there's a way to block a specific program from accessing the Internet while preserving at the same time the ability of other programs to access the Internet, and if there's a way, so how?
iptables my friend.. If it's a known program, try gufw in the repositories :
it's a graphical interface for it. ;)
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“One original thought is worth a thousand mindless quotings.”
“Le vrai n'est pas plus sûr que le probable.”
Diogene Laerce