Forgot to say that if you have installed some firewall on your boxes, you have to authorize ports used by this example otherwise net packets will be discarded or blocked.
This example works over any pct/ip network.
In case of different networks (like 2 PC connected over internet) if routers or HW firewalls are used, some NAT (Network Address Translation) rules must be in place inside routers in order to let public IPs been exchanged with local lan IPs.
In case internet connection is using modems the only thing to warry about is personal firewalls installed on PC.
Regards
Eros
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