EC2托管的Node.js应用程序 - 不能远程连接到端口连接到、端口、应用程序、Node

2023-09-11 09:13:52 作者：会哭但不会认输

更新：原来，唯一的问题是，我是一个防火墙阻塞某些端口的背后，而不是8000

Update: Turns out the only problem was that I was behind a firewall that blocked some ports, but not 8000.

编辑： TL; DR：不能连接到远程端口9000，但8000端口就可以了，我不知道为什么：（

TL;DR: can't connect to port 9000 remotely, but port 8000 is ok and I don't know why :(

我这有Node.js的多数民众赞成在端口上运行的应用程序的 8000 和另一个（的 HTTP代理）端口上运行的 9000

I've got this node.js application that's running on port 8000 and another one (http-proxy) running on port 9000.

在我的机器上运行他们是好的，但我有一些问题，当我把他们的服务器上（ EC2 实例 - 我没有在Web控制台安全组打开端口 [ 1] ）。该应用程序工作正常，但我无法从外部连接到代理。我试图 $远程登录本地主机9000 在服务器上，并将其连接，所以我想这是个好兆头。

Running them on my machine is fine, but I have some problems when I put them up on a server (EC2 instance - I did open the ports in the web console security group[1]). The application works fine, but I can't connect to the proxy from outside. I tried to $ telnet localhost 9000 on the server and it connects, so I guess that's a good sign.

这是我注意到的另一件事是，如果我尝试单独运行的应用程序，我得到了相同的结果，即：8000 - 确定，9000 - NOTOK：其中;. 不过，如果我更改代理使用的端口，从9000到8000，它的工作原理。如果我交换机的端口上，即应用：9000和代理：8000，我可以连接到代理服务器，而不是应用程序。我也尝试过其他的数字，但不会解决它的。

Another thing that I have noticed is that if I try to run the applications separately, I get the same results, i.e.: 8000 - OK, 9000 - NOTOK :<. However, if I change the port the proxy uses from 9000 to 8000, it works. And if I switch the ports, i.e. application:9000 and proxy:8000, I can connect to the proxy, but not to the application. I have also tried other numbers, but that wouldn't fix it either.

我想有一些非常愚蠢的无关的应用程序本身，而我错过，但我不能把我的手指上，所以没有任何人有任何想法，为什么这种设置不起作用？

I guess there's something really stupid that has nothing to do with the application itself and that I'm missing, but I can't put my finger on it, so does anyone have any idea why this setup doesn't work?

server.js

var express = require('express.io');
var app = module.exports = express();

require('./proxy');

app.http().io();
app.listen(8000);
// ...

的proxy.js

var httpProxy = require('http-proxy');
var url = require('url');

httpProxy.createServer(function(req, res, proxy) {

    // ... 
    proxy.proxyRequest(req, res, {
        host: destination.host,
        port: 80
    });

}).listen(9000);

$ netstat的-pln | grep的节点输出

tcp   0      0      0.0.0.0:9000    0.0.0.0:*       LISTEN  1487/node
tcp   0      0      0.0.0.0:8000    0.0.0.0:*       LISTEN  1487/node

安全组的规则

EC2托管的Node.js应用程序 - 不能远程连接到端口连接到、端口、应用程序、Node

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