I've got httpd running on port 80 and I'm trying to bind a node app to port 8080.
Here it is:
var server = require('http').createServer(function(req, res){
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
});
server.listen(8080);
Obviously have run it from ssh command line via
node myApp.js
But whenever I type "http://my-domain:8080/" in the browser it just hangs and gives me nothing..
I've tried a range of different ports and listening on hostname 0.0.0.0, all giving the same result.
Have run netstat as comments suggested and results is :
tcp 0 0 0.0.0.0:8080 0.0.0.0:* LISTEN 3894/node
I'm using centOS on nan unmanaged VPS!
EDIT: Looks like its a firewall issue, could someone point me in the right direction as to how to configure the firewalls for a CentOS VPS.. ?
Might be your firewall settings. In the shell prompt on the server, try connecting with curl.
curl -v http://localhost:8080/
If you can access it via the localhost but not via a browser then you most likely have a firewall issue.
If you can access the server via localhost then the next thing to do is to test the server from the outside via IP address. If you can access it via IP address then you have a DNS issue. If you cannot access it via IP address from the outside then you have firewall issue.
Firewall issues are platform specific. We'd need to know the platform to point you in the right direction.
try to write:
var http = require('http');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
}).listen(8080);
console.log('Server running ');
the .listen(8080); is in the same line.
or to run it with localhost:8080/ from the server may he block from outside
Related
I am test driving AWS Lightsail for one of my NodeJS experiments. Installed NodeJS using SSH on the server and ran a demo program(see below). I can see the output "Hello World" from the SSH terminal with the command " curl localhost:3000". But when I access it from outside the network, using my web browser in my home PC, with the Public IP address and port number 3000, it says "This site can't be reached" I've forwarded the port 3000 on the server side.
Anything I am missing?
var http = require('http');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
}).listen(3000, "127.0.0.1");
console.log('Server running at http://127.0.0.1:3000/');
If you don't pass on host to .listen, server will run on all interfaces including 0.0.0.0. But you are running server to listen on localhost only.Change .listen like this:
var http = require('http');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
}).listen(3000);
You will also have to add Inbound traffic rule(Firewall) to open port 3000 to access the server over the internet as your server running on port 3000.
Click on an instance and then select networking option
Go to firewall section and click on "add another" as shown in below pic
Click on save and then you should be able to access a server with http://IP:3000.
If you want to access your server without specifying a port in URL then you have to configure 'Nginx reverse proxy'. Also, port 80(for http) and port 443(https) should be allowed through a firewall.
If you .listen(3000, "127.0.0.1"); listen on 127.0.0.1, it only allows local machine to access the server. You need .listen(3000, "0.0.0.0"); to allow any ip address to access the server.
In hostgator I have a VPS running centOS. I installed NodeJS and screen.
I added the following code to a file named index.js:
//1
var http = require('http');
//2
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/html'});
res.end('<html><body><h1>Hello World</h1></body></html>');
}).listen(3000);
console.log('Server running on port 3000.');
On 'screen:1' I run the following command:
node index.js
It gives me the console output stating 'Server running on port 3000.'
I switch to 'screen:0' and run the following command:
curl localhost:3000
and I get the following response:
<html><body><h1>Hello World</h1></body></html>
Yet, when I try my server's IP address (substitute the xxx for a real IP address, cause I'm not disclosing my VPS IP address):
xxx.xxx.xxx.xxx:3000
The page never comes up and eventually it times out.
I've tried various ports (8080, 7000) and to not avail.
Do I need to place the iOS project in a different directory.
Currently I have it in /root/Projects/NodeTutorial2/index.js.
What do I need to do to get a hello world response from my VPS?
If you're getting a response from on the box, but not from other boxes, it's almost certainly a firewall issue. Turning off IPTables or allowing the traffic in on the port in question is one option but an easier / more appropriate option is to simply have your app use port 80 (for HTTP) or 443 (for HTTPS). You can either do that by listening to that port on the app directly, or by having a web server that acts as a reverse-proxy for you (e.g. NGINX or Apache).
I run Apache on my server. Going to my address x.x.x.x:port loads the index.html page in /var/www. When I stop the server, I can no longer connect (all good).
Now I start the node server with node server.js (the server.js file below is also located in /var/www).
var http = require('http');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
}).listen(port, 'x.x.x.x');
console.log('Server running at http://x.x.x.x:port/');
This gives the error listen EADDRNOTAVAIL, but I am not running any other node server (there is no other process running at this port).
I have also tried omitting the IP address and just listening thus: listen(port);
This returns no errors, but I cannot connect to the server (Browser says: Firefox can't establish a connection to the server at x.x.x.x:p.)
I have found out the problem. You don't need to specify a host name:
listen(port, 'x.x.x.x')
should just be
listen(port)
otherwise the server will not accept any connection except ones directed at the specified ip.
The port is in use or not available. Try a different port like:
listen(88, 'x.x.x.x');
and see if that connects. Also, make sure that x.x.x.x is actually the ip address of your server. You can listen on all IPs by doing:
listen(88, '0.0.0.0');
or by leaving the host/ip section out entirely. If it does connect on another port, you just need to find what is using the port you want. If it's port 80, use:
sudo netstat -tulpn | grep :80
to get the program using that port.
Sounds like the port is locked up and in use..
The following command will give you a list of node processes running.
ps | grep node
To free up that port, stop the process using the following.
kill <processId>
I installed node.js and socket.io in my CentOS 6.4 server. It is running parallel with Apache, with Apache as main server (port 80)
I wrote a simple Hello world script to test node.js installation:
var http = require('http');
http.createServer(function (request, response) {
response.writeHead(200, {'Content-Type': 'text/plain'});
response.write('Hello World\n');
response.end();
}).listen(8088);
console.log('Server started');
If I run it in command line I get 'Server started'. But when I tryh to access it via web browser, typing http://xxx.xxx.xxx.xxx:8088 it never loads. I've tried to use many other port numbers with no success. I have to ips in my server, but neither of them work, nor my domain addres under those ips.
How could I fix it?
EDIT: node,js is installed in another server, and I'm trying to access it via webbrowser from outside this server.
Thanks!
i think you need to open port 8088 by firewall on server.
see man iptables
i am trying this simple demo off of the node.js home page:
var http = require('http');
http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello World\n');
}).listen(1337, '127.0.0.1');
console.log('Server running at http://127.0.0.1:1337/');
i have opened the port on amazon ec2 (1337) in its security group.
[root#domU-12-31-38-01-8A-8D servers]# /usr/local/bin/node nodeexample.js
Server running at http://127.0.0.1:1337/
i get nothing back but the typical server is not responding. please help this noob out
danke
You're listening to 127.0.0.1 which makes node listen only to the loopback interface and only lets it be be reached from localhost itself.
If you listen to 0.0.0.0 instead, you will listen to all the machine's network interfaces and lets you be reachable over the Internet on any public IP the machine is using. This is probably what you want.