PROSAGA码农传奇-决策支持-Azure策略对端口范围的支持

Azure策略对端口范围的支持

作者: 只怕再见是故人
发布时间: 2024-10-11 02:25:13 (22天前)

问题-因此，我想阻止创建NSG的人打开对某些端口（22、3389等）的Internet访问。我可以创建一个策略来阻止特定的端口，例如，
<pre><code>{
"allOf": [{
 "field": "Microsoft.Network/networkSecurityGroups/securityRules/access",
 "equals": "Allow"
 },
 {
 "field": "Microsoft.Network/networkSecurityGroups/securityRules/direction",
 "equals": "Inbound"
 },
 {
 "anyOf": [{
 "field": "Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRange",
 "equals": "22"
 },
 {
 "field": "Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRange",
 "equals": "3389"
 }
 ]
 }
]
</code></pre>如果在安全规则中使用了特定端口，这将阻止NSG的创建。但是，如果有人创建允许端口范围的NSG规则（例如3300-3400），则可以绕过该规则。想知道政策如何处理端口范围以及在这种情况下最好的方法是什么。我尝试了destinationPortRanges [*]数组，但是不起作用。 <code>
{
"not": {
 "field": "Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]",
 "Equals": "22"
}
}
</code> 当destinationPortRanges指定为“ 20-25”时，该规则仍允许创建NSG。

查看内置策略“ 应阻止从Internet进行RDP访问 ”。也应阻止来自Internet的SSH访问。

老实说，阅读起来很痛苦，但是看起来它确实满足了您的需求。

```
{
                "anyOf": [
                  {
                    "field": "Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRange",
                    "equals": "*"
                  },
                  {
                    "field": "Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRange",
                    "equals": "3389"
                  },
                  {
                    "value": "[if(and(not(empty(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRange'))), contains(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRange'),'-')), and(lessOrEquals(int(first(split(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRange'), '-'))),3389),greaterOrEquals(int(last(split(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRange'), '-'))),3389)), 'false')]",
                    "equals": "true"
                  },
                  {
                      "count": {
                        "field": "Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]",
                        "where": {
                          "value": "[if(and(not(empty(first(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]')))), contains(first(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]')),'-')), and(lessOrEquals(int(first(split(first(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]')), '-'))),3389),greaterOrEquals(int(last(split(first(field('Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]')), '-'))),3389)) , 'false')]",
                          "equals": "true"
                        }
                      },
                      "greater": 0
                  },
                  {
                    "not": {
                      "field": "Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]",
                      "notEquals": "*"
                    }
                  },
                  {
                    "not": {
                      "field": "Microsoft.Network/networkSecurityGroups/securityRules/destinationPortRanges[*]",
                      "notEquals": "3389"
                    }
                  }
                ]
              },
```