默认NSG规则如何允许VM上的互联网查询？

Question

NSG的默认规则如下。

入站：

+-----------------------------------+----------+--------------------+-------------+-----------------+------------------+----------+--------+
|               Name                | Priority |     Source IP      | Source Port | Destination IP  | Destination Port | Protocol | Access |
+-----------------------------------+----------+--------------------+-------------+-----------------+------------------+----------+--------+
| ALLOW VNET INBOUND                |    65000 | VIRTUAL_NETWORK    | *           | VIRTUAL_NETWORK | *                | *        | ALLOW  |
| ALLOW AZURE LOAD BALANCER INBOUND |    65001 | AZURE_LOADBALANCER | *           | *               | *                | *        | ALLOW  |
| DENY ALL INBOUND                  |    65500 | *                  | *           | *               | *                | *        | DENY   |
+-----------------------------------+----------+--------------------+-------------+-----------------+------------------+----------+--------+

出站：

+-------------------------+----------+-----------------+-------------+-----------------+------------------+----------+--------+
|          Name           | Priority |    Source IP    | Source Port | Destination IP  | Destination Port | Protocol | Access |
+-------------------------+----------+-----------------+-------------+-----------------+------------------+----------+--------+
| ALLOW VNET OUTBOUND     |    65000 | VIRTUAL_NETWORK | *           | VIRTUAL_NETWORK | *                | *        | ALLOW  |
| ALLOW INTERNET OUTBOUND |    65001 | *               | *           | INTERNET        | *                | *        | ALLOW  |
| DENY ALL OUTBOUND       |    65500 | *               | *           | *               | *                | *        | DENY   |
+-------------------------+----------+-----------------+-------------+-----------------+------------------+----------+--------+

如果与此NSG关联的虚拟机打开internet浏览器并导航到某个网站，如何将该网站返回给该虚拟机？

据我所知，允许出站流量，但只允许来自VNET或LB的流量返回。

虚拟机是否会发出HTTP请求，该请求将命中目标服务器，并将响应发送回虚拟机，最终会被NSG阻止？

Answer 1

因为允许出站流量-连接已建立，且数据包正在使用已建立的连接。NSG阻止创建新连接，不接触现有连接。