Whitelisting home connections is rather pointless since the majority
have dynamic IP addresses that constantly change. Then there's the
problem that IP addresses can be easily spoofed.
The inbound packets can be source-spoofed, but full TCP links and return
UDP will not reach the spoofer unless ARP poisoning or something similar
enough is used. In cases of UDP being listened to without caring whether
the reply gets to where it's supposed to go, spoofing will work. TCP?
Not so much unless you can get into the network between the source and
the destination and even then it's a pain. Home IP addresses changing is
a challenge though.
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