John Harris wrote:
> Thing is, binding a port and expecting it to be open to every network 
> interface you've got are two very different things.

Once again John Harris is completely wrong. The bind system call is
precisely how a program specifies which network interfaces it wants to
open a socket to. A program that calls bind with IN6ADDR_ANY_INIT or
INADDR_ANY and a specific port number expects that port to be open to
every network interface the computer has.

A program that doesn't intend to listen on every network interface will
bind to an IP address assigned to one interface to listen only on that
network, or maybe a localhost address to listen only on the loopback
interface. The port and the network interface are specified together in
a single sockaddr object passed to a single system call, so it's very
much the same thing.

Björn Persson

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