PHP ssh2_tunnel:使用代理/socks抛出ssh服务器？

Question

我想使用代理/socks抛出ssh服务器，我在这里找到了很好的示例How do you proxy though a server using ssh (socks…) using php’s CURL?，但是示例不起作用，下面是我的代码。

<?php
$connection = ssh2_connect("64.246.126.25", 22);
if(ssh2_auth_password($connection, "ubnt", "ubnt"))
{
    if ($tunnel = ssh2_tunnel($connection, "127.0.0.1", 9999))
    {
        $url = "http://checkip.dyndns.com/";
        $agent= 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.0.3705; .NET CLR 1.1.4322)';
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_HEADER, true);
        curl_setopt($ch, CURLOPT_USERAGENT, $agent);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_PROXY, "127.0.0.1:9999");
        curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
        $result = curl_exec($ch);   
        echo $result;

    }else{
        echo "Tunnel creation failed.\n";
    }
} 
else
{
    echo "failed!";
}
?>

当我执行这个脚本时，我得到了错误响应：

Warning: ssh2_tunnel() [function.ssh2-tunnel]: Unable to request a channel from remote host in /home/domain.com/ssh2/index.php on line 7
Tunnel creation failed. 

我会在谷歌上搜索这个错误，并尝试修复，但无法解决问题。

有人能帮我吗？

Answer 1

ssh_tunnel似乎不是这样工作的，ssh_tunnel会请求"$connection“对指定的ip /端口进行隧道操作。

在您的代码中，我假设您正在尝试创建一个本地端口，该端口作为代理监听cURL请求，但基本上您是在请求ssh服务器连接到它自己(127.0.0.1)。

正如您在我的示例中看到的，到Google的隧道只是一个流，您可以通过它发送流请求

$connection = ssh2_connect($sshServerIP, 22);
ssh2_auth_password($connection, $sshServerUser, $sshServerPass);
$sock = ssh2_tunnel($connection, "google.com", 80);
fwrite($sock, "GET /? HTTP/1.0\r\n\r\n");
$body = "";
while (!feof($sock))
$body .= fgets($sock);
echo $body;

在请求到您的ip /端口的通道之前，您可以通过以下方式打开本地端口：

$localsock = socket_create_listen(0);
socket_getsockname($localsock, $YourInternetIPaccessible, $openedPort);

然后你的代码有了这些改变：

$connection = ssh2_connect("64.246.126.25", 22);
if(ssh2_auth_password($connection, "ubnt", "ubnt"))
{
    if ($tunnel = ssh2_tunnel($connection, $YourInternetIPaccessible, $openedPort))
    {
        $url = "http://checkip.dyndns.com/";
        $agent= 'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.0.3705; .NET CLR 1.1.4322)';
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_HEADER, true);
        curl_setopt($ch, CURLOPT_USERAGENT, $agent);
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_PROXY, "127.0.0.1:$openedPort");
        curl_setopt($ch, CURLOPT_PROXYTYPE, CURLPROXY_SOCKS5);
        $result = curl_exec($ch);   
        echo $result;

    }else{
        echo "Tunnel creation failed.\n";
    }
} 
else
{
    echo "failed!";
}