Node js EACCES error when listening on most ports

Question

I m testing out an app  hopefully to run on heroku  but am having issues locally as well    It s giving me an EACCES error when it runs http Server listen   - but it only occurs on some ports   So  locally I m running   joe joebuntu    node  gt  var h   require  http   createServer     gt  h listen 900   Error  EACCES  Permission denied     at Server  doListen  net js 1062 5      at net js 1033 14     at Object lookup  dns js 132 45      at Server listen  net js 1027 20      at  object Context  1 3     at Interface  lt anonymous gt   repl js 150 22      at Interface emit  events js 42 17      at Interface  onLine  readline js 132 10      at Interface  line  readline js 387 8      at Interface  ttyWrite  readline js 564 14    I don t have anything running on port 900  or any of the other 20 ports I ve tried   so this should work   The weird part is that it does work on some ports   For instance  port 3000 works perfectly   What would cause this     Update 1   I figured out that on my local computer  the EACCES error is coming because I have to run node as root in order to bind to those certain ports   I don t know why this happens  but using sudo fixes it   However  this doesn t explain how I would fix it on Heroku   There is no way to run as root on Heroku  so how can I listen on port 80

User · Answer

My error is resolved using  On Windows   app set  PORT   4000    process env PORT    app listen app get  PORT     lt IP4 address gt         gt        console log  Server is running at     app get  PORT           Allow the NodeJS app to access the network in Windows Firewall

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OMG   In my case I was doing     listen ip  port  instead of    listen port  ip  and that was throwing up the error msg  Error  listen EACCES localhost  I was using port numbers    3000 and even tried with admin access  Nothing worked out  Then with a closer relook  I noticed the issue  Changed it to    listen port  ip  and everything started working fine    Just calling this out in case if its useful to someone else

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I had a similar problem that it was denying to run on port 8080  but also any other   Turns out  it was because the env local file it read contained comments after the variable names like   PORT 8080   The port the server runs at   And it interpreted it like that  trying to use port  8080   The port the server runs at   which is obviously an invalid port  -1    Removing the comments entirely solved it   Using Windows 10 and Git Bash by the way     I know it s not exactly the problem described here  but it might help someone out there  I landed on this question searching for the problem for my answer  so    maybe

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Remember if you use sudo to bind to port 80 and are using the env variables PORT  amp  NODE ENV you must reexport those vars as you are now under root profile and not your user profile  So  to get this to work on my Mac i did the following   sudo su export NODE ENV production export PORT 80 docpad run

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this happens if the port you are trying to locally host on is portfowarded

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After trying many different ways  re-installing IIS on my windows solved the problem

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The same issue happened to me  You need to check out your server js file where you are setting your listening port  Change port number wisely in all places  and it will solve your issue hopefully

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

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My error got resolved just by changing port number in server js Specially in this line   const port   process env PORT    8085    I changed my port number to 8085 from 8080   Hope it helps

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Another approach is to make port redirection   sudo iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 900 -j REDIRECT --to-port 3000   And run your server on  1024 port   require  http   createServer   listen 3000     ps the same could be done for https 443  port by the way

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I got this error on my mac too  I use npm run dev to run my Nodejs app in Windows and it works fine  But I got this error on my mac - error given was  Error  bind EACCES null 80    One way to solve this is to run it with root access  You may use sudo npm run dev and will need you to put in your password   It is generally preferable to serve your application on a non privileged port  such as 3000  which will work without root permissions   reference  Node js EACCES error when listening on http 80 port  permission denied

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Running on your workstation  As a general rule  processes running without root privileges cannot bind to ports below 1024   So try a higher port  or run with elevated privileges via sudo   You can downgrade privileges after you have bound to the low port using process setgid and process setuid   Running on heroku  When running your apps on heroku you have to use the port as specified in the PORT environment variable   See http   devcenter heroku com articles node-js  const server   require  http   createServer    const port   process env PORT    3000   server listen port       gt  console log  Listening on   port

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This means the port is used somewhere else  so  you need to try another one or stop using the old port

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For me this issue affected all hosts and all ports on Windows in PowerShell  Disabling Network Interfaces fixed the issue  I had WiFi and an Ethernet connection and disabling the Ethernet Interface fixed this issue  Open  quot Network Connections quot  to view your interfaces  Right-click and select  quot Disable quot

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For me  it was just an error in the  env file  I deleted the comma at the end of each line and it was solved  Before  HOST 127 0 0 1   After  HOST 127 0 0 1

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On Windows System  restarting the service  quot Host Network Service quot   resolved the issue

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Check this reference link      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

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Windows Another one reason - maybe your port has been excluded by some reasons  So  try open CMD under admin rights and run    net stop winnat net start winnat  In my case it was enough  Solution found here    https   medium com  Bartleby ports-are-not-available-listen-tcp-0-0-0-0-3000-165892441b9d

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restart was not enough  The only way to solve the problem is by the following  You have to kill the service which run at that port  at cmd  run as admin  then type   netstat -aon   find  i  quot listening quot  Then  you will get a list with the active service  search for the port that is running at 4200n and use the process id which is the last column to kill it by   taskkill  F  PID 2652

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It means node is not able to listen on defined port  Change it to something like 1234 or 2000 or 3000 and restart your server

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I got this error on my mac because it ran the apache server by default using the same port as the one used by the node server which in my case was the port 80  All I had to do is stop it with sudo apachectl stop  Hope this helps someone

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Try authbind   http   manpages ubuntu com manpages hardy man1 authbind 1 html  After installing  you can add a file with the name of the port number you want to use in the following folder   etc authbind byport   Give it 500 permissions using chmod and change the ownership to the user you want to run the program under   After that  do  authbind node      as that user in your project

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