azure - 来自 Azure Function 的 TcpIp 通信？

Question

我有一个 azure 队列触发器函数，其中包含以下代码:

using (var client = new TcpClient(AddressFamily.InterNetworkV6))
{
   client.Client.DualMode = true;
   client.Connect(endpoint);

   var data = Encoding.ASCII.GetBytes("test");

   using (var outStream = client.GetStream())
   {
        outStream.Write(data, 0, data.Length);
   }
}

我返回的错误:

A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond

端点地址看起来正确，并且当我在本地调试时此代码可以工作，因此我怀疑 azure 服务器可能不允许出站连接。

知道为什么此连接不起作用吗？

<小时/>

更新:这仍然不起作用，我尝试通过以下方式生成客户端:

// DualMode IPV6
var client = new TcpClient(AddressFamily.InterNetworkV6);
client.Client.DualMode = true;
client.Connect(endpoint);

// SingleMode Internetwork
var client = new TcpClient(AddressFamily.InterNetwork);
client.Connect(endpoint);

// Just Endpoint
var client = new TcpClient(endpoint);
client.Connect(endpoint);

// Normal
var client = new TcpClient(hostAddress, port);

// Forced IPV6
var client = new TcpClient("::ffff:" + hostAddress, port);

在本地调试，除了“强制 IPV6”之外，所有这些方法都可以正常工作。在服务器上，我收到以下错误:

== DualMode IPV6
    Failed PingBack: A connection attempt failed because the connected party did not properly 
    respond after a period of time, or established connection failed because connected host 
    has failed to respond [::ffff:204.16.184.62]:3164

== SingleMode Internetwork
    Failed PingBack: A connection attempt failed because the connected party did not properly 
    respond after a period of time, or established connection failed because connected host 
    has failed to respond 204.16.184.62:3164

== Just Endpoint
    Failed PingBack: The requested address is not valid in its context

== Normal
    Failed PingBack: A connection attempt failed because the connected party did not properly 
    respond after a period of time, or established connection failed because connected host 
    has failed to respond 204.16.184.62:3164

== Forced IPV6
    Failed PingBack: The requested address is not valid in its context [::ffff:204.16.184.62]:3164

Answer 1

查看您的 TcpClient 实例，

var client = new TcpClient(AddressFamily.InterNetworkV6)

Azure Functions 中尚无 IPv6。将您的 AddressFamily 切换到 v4:

var client = new TcpClient(AddressFamily.InterNetwork)

应用服务/功能中的出站目的地没有限制。