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> it's so rare for an application to ask you to open a port in your firewall, most users probably don't know how to do it.

in home settings this step has been automated for something like a decade or more. One of UPnP or NAT-PMP are available on basically every router



UPnP is pretty much a security disease. Countless security holes have come from that protocol. Worse is tons of users are behind double NATs and carrier NAT.

Really we just need IPv6 where one app binds to one IP.


But are they enabled and working in the 99.5% house-holds, who do not have a professional Sys-Admin at home?




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