Geth --rpcaddr doubt

Question

Can you tell me the differences between

--rpcaddr 127.0.0.1

--rpcaddr 0.0.0.0

--rpcaddr my_public_ip

--rpcaddr my_private_ip

during a private network config?

Thank you

Answer 1

--rpcaddr 127.0.0.1 starts the JSON RCP on the localhost network and only connections from your local machine reach the geth server

--rpcaddr 0.0.0.0 starts the JSON RPC on all interfaces and any network can initiate the connection to your geth server

If you need to allow connections only from the localhost network you should use 127.0.0.1

If you need to allow connections from your local network you should use your network ip (usually something like 192.168.1.1)

If you're going to use 0.0.0.0 anybody can connect to your server