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SubjectRe: notion of a local address [was: Re: ioctl SIOCGIFNETMASK: ip alias
> is not local on any of my systems. The only exceptions
> are some Linux boxen that I did not ask to do so.

Todays reading is from RFC990 in the book of Reynolds & Postel, page number 6

And the IETF spake thusly

| The class A network number 127 is assigned the "loopback" function, that
| is, a datagram sent by a higher level protocol to a network 127 address
| should loop back inside the host. No datagram "sent" to a network 127
| address should ever appear on any network anywhere.

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