无法连接到托管在亚马逊EC2节点的Web服务器 [英] Can't connect to Node web-server hosted on Amazon EC2

问题描述

我运行在Amazon EC2的一个节点的应用程序。该应用程序包括一个简单的Web服务器用来服务于索引页，但它不工作。

I'm running a node app on an Amazon EC2. The app includes a simple web server intended to serve the index page, but it doesn't work.

下面是服务器code：

Here's the server code:

var http = require('http'),
fs = require('fs'),
io = require('socket.io'),
index;

fs.readFile('client.html', function(err, data){
    if (err){
        throw err;
    }
    index = data;
});

var server = http.createServer(function(request, response){
    response.writeHeader(200,{"Content-Type": "text/html"});
    response.write(index);
    response.end();
}).listen(1223);

在EC2分配的公网IP​​地址 54.187.31.42 。我运行应用程序，打开浏览器，连接到 54.187.31.42:1223 预计送达的网页和什么也得不到。

The EC2 is assigned the public IP address 54.187.31.42. I run the app, open my browser, connect to 54.187.31.42:1223 expecting to be served a web page and get nothing.

1. 什么是错我的服务器code？

1. What is wrong with my server code?

我用这个答案检查应用程序运行在EC2的IP，奇怪获得 172.31.3.67 - 为什么是返回地址从一个亚马逊分配给本机有什么不同？

I used the snippet found in this answer to check the IP of the EC2 running the app, and oddly get 172.31.3.67 - why is the returned address different from the one assigned to the machine by Amazon?

因此​​，尝试连接到 172.31.3.67:1223 也失败了。

Consequently, trying to connect to 172.31.3.67:1223 also fails.

直接从亚马逊开发的控制，如果这能帮助确认是不是的服务器的IP是错了或什么的问题。

Straight from the Amazon dev controls, if that helps confirm it isn't an issue of the server IP being wrong or something.

推荐答案

在code看起来不错，尝试与您在AWS控制台中看到的公共IP /公共DNS连接。

The code looks fine, try connecting with the public IP/public DNS that you see in the AWS console.

请尝试以下方法，你的应用程序将工作：

Try the following and your application would work:

1. 打开的端口（在你的案件1223）在您的实例的安全组。
2. 停止防火墙的机器上（如iptables的），现在使用公网IP或公共DNS访问您的服务器。

如果您现在可以acceess你的机器，这意味着什么，在iptables的过滤了您的流量。您可以修改相应的iptables规则。

If you can now acceess your machine that means something in the iptables is filtering your traffic. You can modify the iptables rules accordingly.

这篇关于无法连接到托管在亚马逊EC2节点的Web服务器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！