服务器可以访问代理但不能访问cURL？(Server accessible to proxies but not cURL?)

 我用代理测试了我的本地服务器，我的朋友们都可以在他们的浏览器中加载url，但是当我尝试在单独的服务器上使用cURL时，它无法连接。 
 
 这是URL，它在我的浏览器上加载并使用我朋友的互联网： 
 
http://pc.stephen3.com:8080/gameq.php
 
 这是我在单独的服务器上使用的代码，它成功检索所有其他URL（如谷歌和雅虎） 
 
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://pc.stephen3.com:8080/gameq.php");
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$err = curl_error($ch);
$resp = curl_exec($ch);
echo $resp;
echo $err;
 
 但它在我的主服务器的URL上没有返回任何内容，并且 
 
curl_error($ch);
 
 （确实说，现在什么也没说）“无法连接到主持人” 
 
 任何想法可能是什么？ 网址无处不在，但在cURL中。 代码可以在任何地方使用，但使用URL。 
 
 编辑：我想到，可能是因为我的外部服务器上的出站流量在端口8080上而不是普通服务器的80上，将不得不测试我的主机是否允许其他端口卷曲。 

I have tested my local server with a proxy and my friends can all load the url in their browser, but when I try to use cURL on a separate server, it fails connecting.
 
Here is the URL, it loads on both my browser and using my friend's internet:
 
http://pc.stephen3.com:8080/gameq.php
 
Here is the code I am using on a separate server, it successfully retrieves all other URLs (like google and yahoo)
 
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://pc.stephen3.com:8080/gameq.php");
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 5);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$err = curl_error($ch);
$resp = curl_exec($ch);
echo $resp;
echo $err;
 
But it returns nothing on my home server's url, and
 
curl_error($ch);
 
(did say, now says nothing) "couldn't connect to host"
 
Any ideas what it could be? The url works everywhere, but in cURL. The code works everywhere but with the URL.
 
EDIT: It occurred to me that it may be because of the outbound traffic on my external server being on port 8080 instead of 80 for regular servers, will have to test if my hoster allows curl on other ports.

原文：https://stackoverflow.com/questions/15190694