vs Debug Web page localhost

The server that looks like IIS is called:

can only access their own localhost, that is, 127.0.0.1 is the loopback address (LoopBack), that is, to access the machine, is not to pass the network card.

The alias is localhost. This address can no longer be accessed externally. can only be native (without the NIC). If you want external access, you must bind my IP address (ipconfig, such as 211.68.43.48).

It's me knocking at this IP address 211.68.43.48) also cannot access the Web page. Unless bound:

1) IP

2) Arbitrary IP (Any IP): 0.0.0.0, can be accessed through any network card (there are other ways: make two NICs, one to access the inside one access external)

Some must go through the network card, you can plug themselves into the network cable, pass the network card

vs Debug Web page localhost