I don't remember where I learned about restricting sockets to specific addresses, and I can't find any really descriptive information on it. Very frustrating... :(

Here is a relevant snippet from perlipc: 

       And here's a corresponding server to go along with it.
       We'll leave the address as INADDR_ANY so that the kernel
       can choose the appropriate interface on multihomed hosts.
       If you want sit on a particular interface (like the
       external side of a gateway or firewall machine), you
       should fill this in with your real address instead.

[download]
And here's something from Socket: 
       INADDR_ANY
            Note: does not return a number, but a packed string.
 
            Returns the 4-byte wildcard ip address which
            specifies any of the hosts ip addresses. (A
            particular machine can have more than one ip address,
            each address corresponding to a particular network
            interface. This wildcard address allows you to bind
            to all of them simultaneously.)  Normally equivalent
            to inet_aton('0.0.0.0').

[download]
Let's say you have a machine that has two IP addresses: mymachine.example.com and foo.bar.baz.com. A server program which binds to the address mymachine.example.com will only accept connections made to mymachine.example.com. A program which binds to foo.bar.baz.com will only accept connections to foo.bar.baz.com, and a program that binds to localhost will only accept connections to localhost (which must, of course, also be from localhost).

On the other hand, a server program which binds to INADDR_ANY will accept connections made to any address that happens to resolve to the machine in question, including mymachine.example.com, foo.bar.baz.com, and localhost. That's usually what you want.

In reply to Re: Re: Re: local socket by chipmunk
in thread local socket by Punto

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