How could others on a local network access my NodeJS app while it s running on my machine

Question

I have a pretty straight-forward question  I made a web game with NodeJS  and I can successfully play it by myself with multiple browser windows open side-by-side  however  I d like to know if it s possible for other local machines to be able to access and play the game with me too   I naively tried using this url  my-ip-address 8000 and it won t work

User · Answer

var http   require  http    http createServer function  req  res       listen 80   127 0 0 1    console log  Server running at http   127 0 0 1 80

User · Answer

By default node will run on every IP address exposed by the host on which it runs  You don t need to do anything special  You already knew the server runs on a particular port  You can prove this  by using that IP address on a browser on that machine   http   my-ip-address port   If that didn t work  you might have your IP address wrong

User · Answer

const express   require  express     var app   express        app listen Port Number   Your IP Address       e g  app listen 3000   192 183 190 3      You can get your IP Address by typing ipconfig in cmd if your Windows user else you can use ifconfig

User · Answer

your node js server is running on a port determined at the end of the script usually  Sometimes 3000  but can be anything  The correct way for others to access is as you say     http   your network ip address port  e g  http   192 168 0 3 3000  check you have the correct port - and the ip address on the network - not internet ip   Otherwise  maybe the ports are being blocked by your router  Try using 8080 or 80 to get around this - otherwise re-configure your router

User · Answer

If you are using a router then   Replace server listen yourport   localhost    with server listen yourport   your ipv4 address    in my machine it is  server listen 3000   192 168 0 3      Make sure your port is forwarded to your ipv4 address   On Windows Firewall  tick all on Node js Server-side JavaScript

User · Answer

Faced similar issue with my Angular Node Server v6 10 3  which set up in WIndows 10  http   localhost 4201 worked fine in localhost  But  http    ipaddress  4201 not working in other machines in local network   For this I updated the ng serve like this     Older ng serve in windows command Prompt  ng serve --host localhost --port 4201    Updated ng serve   ng serve --host  ipaddress  --port  portno  ng serve --host 192 168 1 104 --port 4201   After doing this modification able to access my application in other machines in network bt calling this url   http   192 168 1 104 4201     http    ipaddress  4201

User · Answer

I had this problem  The solution was to allow node js through the server s firewall

User · Answer

After trying many solution and lot of research I did to the following to make sure my localhost is accessible from other machine in same network  I didn t start my server with IPAddress as parameter to listen method as suggested by others in this question  I did the following to make sure my local node js server is accessible from other machine on same local network  My node server is running in Windows 10 machine   Open  quot Windows Defender Firewall with Advanced Security quot  Select  quot Inbound Rules quot  in the left pane  In the list of available rules   quot Node js Server-side Javascript quot  has  quot Block the connection quot  radio checked  Change this to  quot Allow the connection quot    Please see the attached screenshot   After these changes  I am able to access my localhost using http   IPAddress Port  Thanks

User · Answer

And Don t Forget To Change in Index html Following Code      lt script src  http   192 168 1 4 8000 socket io socket io js  gt  lt  script gt    lt script src  http   code jquery com jquery-1 6 2 min js  gt  lt  script gt    var socket   io connect  http   192 168 1 4 8000      Good luck

User · Answer

One tip that nobody has mentioned yet is to remember to host the app on the LAN-accessible address 0 0 0 0 instead of the default localhost  Firewalls on Mac and Linux are less strict about this address compared to the default localhost address  172 0 0 1    For example   gatsby develop --host 0 0 0 0  yarn start --host 0 0 0 0  npm start --host 0 0 0 0  You can then access the address to connect to by entering ifconfig or ipconfig in the terminal  Then try one of the IP addresses on the left that does not end in  255 or  0

User · Answer

I had the same question and solved the problem  In my case  the Windows Firewall  not the router  was blocking the V8 machine I O on the hosting machine    Go to windows button Search  Firewall  Choose  Allow programs to communicate through Firewall  Click Change Setup Tick all of  Evented I O for V8 Javascript  OR  Node js  Server-side Javascript    My guess is that  Evented I O for V8 Javascript  is the I O process that node js communicates to outside world and we need to free it before it can send packets outside of the local computer  After enabling this program to communicate over Windows firewall  I could use any port numbers to listen

User · Answer

This worked for me and I think this is the most basic solution which involves the least setup possible    With your PC and other device connected to the same network   open cmd from your PC which you plan to set up as a server  and hit ipconfig to get your ip address  Note this ip address  It should be something like  192 168 1 2  which is the value to the right of IPv4 Address field as shown in below format       Wireless LAN adapter Wi-Fi       Connection-specific DNS Suffix           Link-local IPv6 Address             ffff  ffff ffff ffff ffad 14      IPv4 Address                        192 168 1 2      Subnet Mask                         255 255 255 0    Start your node server like this   npm start  lt IP obtained in step 1 3000 gt  e g  npm start 192 168 1 2 3000 Open browser of your other device and hit the url   lt your ip 3000 gt  i e  192 168 1 2 3000 and you will see your website

User · Answer

put this codes in your server js    app set  port    80   app listen app get  port         gt    console log  Node app is running on port   app get  port         after that if you can t access app on network disable firewall like this

User · Answer

Make sure the server is running  either by using  npm start   or  nodemon  in the command line window

User · Answer

The port is probably blocked by your local firewall or router  Hard to tell without details   But there is a simple solution for which you don t have to mess with firewall rules  run node as a privileded process to serve on port 80  etc     Check out Localtunnel  Its a great Ruby script service  which allows you to make any local port available on the internet within seconds  It s certainly not useful for a production setup  but to try out a game with colleagues  it should work just fine

[javascript] How could others, on a local network, access my NodeJS app while it's running on my machine?

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