What is ip address 0.0.0.0
I've been looking at the socket information in proc/net/tcp and I see a lot of the home connections (127.0.0.1) with a remote address of 0.0.0.0. I was just wondering if a blank address like that had a use or name.
It means they are not bound to any particular remote address. This is most common with TCP listening sockets, and it means they will accept in inbound connection regardless of its source IP address.
In that context, it basically means that there is no internet connection.
For the nitty-gritty, check out this question.