I am trying to get a NodeJs application to run on a Amazon Linux server using port 80. Currently when I run the app it is defaulting to port 1024. I understand that this is due to the fact that I have to be root to run on port 80 but given I am on a aws linux box I am not able to run that as root. I have been digging for awhile but I am coming up short on what I need to adjust to get this to run properly.
sudo bash will allow you to connect as root on your EC2 Amazon Linux instance.
I would question why do you want to run NodeJS on port 80, the best practice would have a load balancer in front of your instance to accept HTTPS calls and relay to whatever port nodejs will run on your instance, in a private subnet.
I would suggest to read this doc to learn how to do this : https://aws.amazon.com/getting-started/projects/deploy-nodejs-web-app/
Related
I have a nodejs app running on port 4000. I have developed it in my Vagrant box running Ubuntu 16.04 where I am able to curl both http://localhost:4000 and http://vagrant-IP:4000.
However, when I replicate the same set-up on an EC2 instance, I am able to curl only on http://localhost:4000 and not on http://ec2-public-IP:4000.
In both cases server is listening on 0.0.0.0 and CORS is enabled. (Here, vagrant-IP and ec2-public-IP are actual IPv4 addresses). How can I fix this?
I would expect this is a firewall problem - you need to punch a hole through the Amazon firewall to allow the incoming request.
This link should help: Authorizing Inbound Traffic for Your Linux Instances
Hi guys im newbie in vps... I've bought an ovh not managed vps . I like to face problems... But I don't find any documents to these one. Is simple like I said I want to run a nodejs app in centos vps environment but I have enabled plesk.. and I saw in console running the app with the trace but I try to open website with the port and doesn't find anything.
http://vps406315.ovh.net
Thx for all guys
-----------------EDIT-------------------
I'm going to explain better,sorry for previous post.
There is no error, in my console all is ok. Like I said i have an CentOS VPS. Steps that I did:
Connect with PUTTY
Go to folder where is the NodeJS project.
I set the port to 8080
Write node index.js
The app is running and writing the right trace.
I use chrome to check the ip, and show me the default plesk page.
I use wget to check it, and with only http://92.222.71.137/. I attach
an screenshot
I tried to use with the port 8080 with the chrome and wget in putty,
and the response was the same.
In the other hand if I use http://92.222.71.137:8080/login with putty
download the right login.html, and the nodejs app write a trace
indicate me that someone connect to that page. But if I access with
chrome is not working.
Now I would like no know how to make access frome Chrome.
Thx 4 all and sorry for my newbie knowledge
You should give some other details on the configuration or eventual errors you get (both on the browser and the VPS) and how you run the node app (behind a web server, for example)
If you are not running you node app behind a web server, are the node app listening on the correct interface ? 127.0.0.1 and 92.222.71.137 (your site external address) are not the same.
On your VPS you can try to call the node app from the VPS itself using wget or cURL and looking for what happen in the app trace.
Finally it was easy... only i had to open a port to use with TCP, using
iptables -I INPUT -p tcp --dport 8856 --syn -j ACCEPT –
I'm a Linux beginner and have a Linux Ubuntu 12.04 server. I've installed node.js and created a webserver script. That works fine, but it runs as root user.
I know that's not good (root-user & webserver = unsafe).
How can I run the webserver script as an non-root user? Does somebody know a good detailed tutorial or can give me some advice?
You have two options:
Listen on port 80
Run as root, start your app's listen() on port 80 and them immediately drop to non-root. This is what Apache does, for example. Not recommended since it's easy to get this wrong, and lots of other details (writing to log files, initialization required before you can listen, etc.). Not standard practice in node.
Listen on port >=1024*
Run as non-root, listen on a port >= 1024 (say: 8000, or 8080), and have someone else listen on port 80 and relay port 80 traffic to you. That someone else can be:
A load-balancer, NAT, proxy, etc. (Maybe an EC2 load balancer if you're running on EC2, e.g.)
Another http server, say Apache httpd or ngnix.
For an ngnix example, see this: Node.js + Nginx - What now?
you can just run node hello.js
I would like to run a node.js TCP server on port 80 on an Amazon EC2 instance of Amazon Linux. I have added 80 to the security group, but the problem is letting node.js bind to port 80, which normally requires root permission.
The easiest solution seems to be using authbind, but it isn't accessible from the EC2 yum repo. Is there an equivalent utility for Amazon Linux? Or some other workaround for this distro ? Or is it actually a bad idea to use authbind?
I ended up binding to a higher port and then using iptables to forward port 80 traffic to that port. Another option was to use an AWS load-balancer from incoming port 80 to a higher port on the ec2 instance.
It's a little tedious, but if you install gcc you can compile it from source. You can go here to get the 2.1.1 release. Click the link that says "Snapshot" to get a tar.gz file. I couldn't seem to download it directly using wget (had to download from web browser and then upload), YMMV.
If using systemd, you can use AmbientCapabilities to allow a service to bind to a lower port.
This is done through your service configuration file in the /etc/systemd/system directory:
[Service]
AmbientCapabilities=CAP_NET_BIND_SERVICE
...
I have a node.js server running on ec2. I'd like for that server to automatically push data to another node.js server that is running on my laptop.
What is the best way to do something like this?
You could use a service like showoff.io to create an entry point to access your local laptop, or you could just create an SSH tunnel by running this command on your laptop:
ssh -R port:localhost:remoteport ec2-host
That will allow port on the loopback interface of your EC2 server to connect to remoteport on your laptop.
Then just modify your code to connect to the node.js program running on your laptop via the IP of 127.0.0.1 and port of port.
You could have the EC2 node.js call a function from the local node.js, and pass the data as variables