Is 0.0.0.0 a valid IP address?

Question

Is 0.0.0.0 a valid IP address? I want my program to be able to store it as an indication that no address is in use, but this won\'t work if it\'s actually valid.

Answer 1

The 0.0.0.0 is used to bind all IPv4 interfaces. So it's a special value just like 127.0.0.1.