nodejs: listen EACCES: permission denied 0.0.0.0:80

Question

I am trying to create https server to test socket io by node js. According this page

openssl genrsa -out privatekey.pem 2048  openssl req -new -key privatekey.pem -out certrequest.csr  openssl x509 -req -in certrequest.csr -signkey privatekey.pem -out certificate.pem 

i created privatekey.pem and certificate.pem and this is my codes:

var express = require('express'); var https = require('https'); var fs = require('fs');  var options = {     key: fs.readFileSync('privatekey.pem'),     cert: fs.readFileSync('certificate.pem')   }; var app = express();   var server = https.createServer(options, app).listen(443);  var io = require('socket.io').listen(server,()=>{     console.log('listen to https'); });    io.on('connection', function (socket) {     console.log(' user connected');     socket.on('disconnect', function () {         console.log('a user disconnected');     }); }); 

but after running server i got this errors:

tazik@mx:/mnt/Projects/Projects/nodejs/socketserver $ node app.js  events.js:288       throw er; // Unhandled 'error' event       ^  Error: listen EACCES: permission denied 0.0.0.0:80     at Server.setupListenHandle [as _listen2] (net.js:1292:21)     at listenInCluster (net.js:1357:12)     at Server.listen (net.js:1445:7)     at Object.<anonymous> (/mnt/Projects/Projects/nodejs/socketserver/app.js:15:24)     at Module._compile (internal/modules/cjs/loader.js:1158:30)     at Object.Module._extensions..js (internal/modules/cjs/loader.js:1178:10)     at Module.load (internal/modules/cjs/loader.js:1002:32)     at Function.Module._load (internal/modules/cjs/loader.js:901:14)     at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:74:12)     at internal/main/run_main_module.js:18:47 Emitted 'error' event on Server instance at:     at emitErrorNT (net.js:1336:8)     at processTicksAndRejections (internal/process/task_queues.js:84:21) {   code: 'EACCES',   errno: 'EACCES',   syscall: 'listen',   address: '0.0.0.0',   port: 80 } 

I am using linux mx .

Answer 1

Non-privileged user (not root) can't open a listening socket on ports below 1024.

Check this

Give Safe User Permission To Use Port 80

Remember, we do NOT want to run your applications as the root user, but there is a hitch: your safe user does not have permission to use the default HTTP port (80). You goal is to be able to publish a website that visitors can use by navigating to an easy to use URL like http://ip:port/

Unfortunately, unless you sign on as root, you’ll normally have to use a URL like http://ip:port - where port number > 1024.

A lot of people get stuck here, but the solution is easy. There a few options but this is the one I like. Type the following commands:

> sudo apt-get install libcap2-bin  > sudo setcap cap_net_bind_service=+ep `readlink -f \`which node\``  

Now, when you tell a Node application that you want it to run on port 80, it will not complain.

EDIT: Add a space in the setcap command