1. Special address : 0.0.0.0, which means to monitor all addresses of the machine, including the local, intranet, and public network (if any) addresses, that is, fully open, and no one will refuse. This address should not be monitored unless it is convenient and safe.
2. Local address : 127.0.0.1 (some configurations can be written as localhost). Only other processes on the same machine can connect to this address, and other machines cannot be connected. For the sake of safety and simplicity, some sample scripts of FISCO BCOS write this address by default, including the default configuration of the build_chain script. The user sometimes finds that other machines can’t be connected by running the client program. This is probably the reason, or you can check whether the network policy is enabled for interconnection. It is recommended to use the system’s telnet [ip] [port] command to quickly detect it first. Whether it can be connected.
3. Intranet address : usually 192.168.xxx.xxx, 172.xxx.xxx.xxx, 10.xxx.xxx.xxx is the intranet address, if you monitor this address, only other machines in the same LAN can access it.
4. External network address : The public network address exposed on the Internet, or the address that can be accessed from the organization's external network, in short, the external address can be connected to the external server.