Cannot call rpc api from other machine in same local network

Question

cannot call rpc api from other machine in same local network

There is a regtest node in my local network , I can call rpc api only from the node's machine,not my local machine.

I know rpcallowip is changed in recent release https://bitcoin.org/en/release/v0.18.0#configuration-option-changes

http clinet httpie

my local machine's ip: 192.168.1.155

btc node's ip: 192.168.1.132

the port 8332 is opened sudo ufw allow 8332.

bitcoind version

$ bitcoind -version                 
# Bitcoin Core Daemon version v0.18.0.0-g2472733a24a9364e4c6233ccd04166a26a68cc65

command start bitcoind

I start regtest , and my ip is 192.168.1.155

bitcoind -regtest -deprecatedrpc=generate -printtoconsole -rpcuser=user -rpcpassword=password -rpcallowip=0.0.0.0/24 -rpcbind=127.0.0.1  -server -rpcport=8332

client request

# request from btc node's machine
http POST http://user:password@127.0.0.1:8332 jsonrpc="2.0" method="getblockchaininfo" id=1
# successed

# request from my local machine 192.168.1.155
http POST http://user:password@192.168.1.132:8332 jsonrpc="2.0" method="getblockchaininfo" id=1
# http: error: ConnectionError: HTTPConnectionPool(host='192.168.1.132', port=8332): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7fd6e288f438>: Failed to establish a new connection: [Errno 111] Connection refused',)) while doing POST request to URL: http://user:password@192.168.1.132:8332/

Answer 1

The problem is that you apply wrong options values for -rpcallowip and -rpcbind.

-rpcbind=127.0.0.1

This one tells bitcoind to bind RCP server to 127.0.0.1(localhost). That means it will be available from the same host only.

-rpcallowip=0.0.0.0/24

0.0.0.0/24 means Class C network with IP address range 0.0.0.1 - 0.0.0.254

The correct options in your case are:

-rpcallowip=192.168.1.0/24 -rpcbind=0.0.0.0

or even more secure:

-rpcallowip=192.168.1.155 -rpcbind=192.168.1.132

Answer 2

Finally,I create a proxy to solve it. I am not sure if there is a risk of this code.

https://gist.github.com/toknT/195dc5bf6d5cb6c1cb89cd424ee783bf

var httpProxy = require('http-proxy');
const rpcPort = process.env.RPC_PORT;
const exportPort = process.env.EXPORT_PORT;

httpProxy.createProxyServer({ target: `http://127.0.0.1:${rpcPort}` }).listen(exportPort);

Answer 3

To expand on the answer from @Slavik Svyrydiuk : it only worked for me when starting the daemon with those options (-rpcbind=0.0.0.0 -rpcallowip=192.168.1.0/24).

If I set those in the conf and just started it like normal (sudo bitcoind -daemon) then it WOULD NOT open the port to external connections. It works only if I start the daemon with those settings like this:

sudo bitcoind -daemon -rpcbind=0.0.0.0 -rpcallowip=192.168.1.0/24