NodeJs tls library rejects the self signed certificates

[achabahe]

I have An internal network and the nodes inside that network should have a secured communications so i figured out that i should TLS library ro establish connections between them , i have generated Root certificate , server certificate

when the client want to connect to a certain server here is the code that it uses to connect to the servrer:

const port = 5556;
const hostname = '25.33.180.82';
const tls = require('tls');
const fs = require('fs');
const options = {
  host: hostname,
  port: port,
  ca: [fs.readFileSync('root-ca.pem')],
}
var socket = tls.connect(options, () => {
  console.log('client connected',
              socket.authorized ? 'authorized' : 'unauthorized');
  //            console.log(socket)
  process.stdin.pipe(socket);
  process.stdin.resume();

  //socket.end();
})

.setEncoding('utf8')

.on('data', (data) => {
  console.log(data);
})

.on('end', () => {
  console.log("End connection");
});

Error:
Error: self signed certificate in certificate chain
at Error (native)
at TLSSocket. (_tls_wrap.js:1092:38)
at emitNone (events.js:86:13)
at TLSSocket.emit (events.js:185:7)
at TLSSocket._finishInit (_tls_wrap.js:610:8)
at TLSWrap.ssl.onhandshakedone (_tls_wrap.js:440:38)
Details:
I see a lot of people who suggest to set rejectUnauthorized=false in my case, i guess setting rejectUnauthorized to false will stop the error but my connections are 100% prone to MITM atacks , I see that this is a bug in nodejs tls library that it suffers from and i can't find any fix any where (i have google to page 5 of google results that is really deep) i don't know how other people don't talk about it , AM I missing something here! !!!!! please correct me if i am wrong !!

• Version:6.11.5
• Platform:Linux osboxes 4.4.0-112-generic io.js (IO.js? iojs?) and node.js documentation fragmentation #135-Ubuntu SMP Fri Jan 19 11:48:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
• Subsystem:TLS

[bnoordhuis]

Can you move your question to the help repo? Thanks.