升級 CRS 或 DRS 規則集版本

Azure 應用程式閘道 Web 應用程式防火牆（WAF）中的 Azure 受控 預設規則集（DRS） 可保護 Web 應用程式免於常見弱點和惡意探索，包括 OWASP 前 10 名攻擊類型。默認規則集也會納入 Microsoft 威脅情報收集規則。建議您一律執行 最新的規則集版本，其中包括最新的安全性更新、規則增強功能和修正。

Azure 受控預設規則集（DRS）是 Azure WAF 中最新一代的規則集，取代所有先前的核心規則集（CRS）版本。在 DRS 版本中，請一律使用可用的最高版本（例如，發行時的 DRS 2.2），以確保您擁有最 up-to的保護。

本文提供將 Azure WAF 原則升級至 DRS 2.1 的 PowerShell 範例。雖然這些範例專門參考了 DRS 2.1，但您應該始終升級到最新的可用 DRS 版本，以確保最大程度的保護。

備註

PowerShell 程式碼片段只是範例。將所有預留位置取代為環境中的值。

先決條件

具有有效訂閱的 Azure 帳戶。免費建立帳戶。
套用核心規則集（CRS）或預設規則集（DRS）的現有 Azure WAF 原則。如果您還沒有 WAF 原則，請參閱建立應用程式閘道的 Web 應用程式防火牆原則。
本機安裝的最新版本 Azure PowerShell。本文需要 Az.Network 模組。

升級時的關鍵考量

升級 Azure WAF 規則集版本時，請務必：

保留現有的自訂：繼承您的規則動作覆寫、規則狀態（啟用/停用）覆寫和排除。
安全地驗證新規則：確保新新增的規則最初設定為 日誌模式，以便您可以在啟用封鎖之前監控其影響並微調它們。

準備您的環境和變數

設定所選訂用帳戶、資源群組和 Azure WAF 原則的內容。

Import-Module Az.Network
Set-AzContext -SubscriptionId "<subscription_id>"
$resourceGroupName = "<resource_group>"
$wafPolicyName = "<policy_name>"

取得 WAF 原則物件並擷取其定義。

$wafPolicy = Get-AzApplicationGatewayFirewallPolicy ` 
-Name $wafPolicyName ` 
-ResourceGroupName $resourceGroupName 
$currentExclusions = $wafPolicy.ManagedRules.Exclusions 
$currentManagedRuleset = $wafPolicy.ManagedRules.ManagedRuleSets 
| Where-Object { $_.RuleSetType -eq "OWASP" } 
$currentVersion = $currentManagedRuleset.RuleSetVersion

保留現有的自訂

請勿複製適用於 DRS 2.1 中移除規則的覆寫或排除項目。下列函式會檢查規則是否已移除：

function Test-RuleIsRemovedFromDRS21 { 
    param ( 
        [string]$RuleId, 
        [string]$CurrentRulesetVersion 
    ) 
    $removedRulesByCrsVersion = @{ 
        "3.0" = @( "200004", "913100", "913101", "913102", "913110", "913120", "920130", "920140", "920250", "921100", "800100", "800110", "800111", "800112", "800113" ) 
        "3.1" = @( "200004", "913100", "913101", "913102", "913110", "913120", "920130", "920140", "920250", "800100", "800110", "800111", "800112", "800113", "800114" ) 
        "3.2" = @( "200004", "913100", "913101", "913102", "913110", "913120", "920250", "800100", "800110", "800111", "800112", "800113", "800114" ) 
        } 
    # If the version isn't known, assume rule has not been removed 
    if (-not $removedRulesByCrsVersion.ContainsKey($CurrentRulesetVersion)) { 
        return $false 
        } 
    return $removedRulesByCrsVersion[$CurrentRulesetVersion] -contains $RuleId }

建立新的覆寫物件時，請使用 DRS 2.1 群組名稱。下列函式會將舊版 CRS 群組名稱對映至 DRS 2.1 群組：

function Get-DrsRuleGroupName {
    param ( 
        [Parameter(Mandatory = $true)]
        [string]$SourceGroupName )
    $groupMap = @{ 
    "REQUEST-930-APPLICATION-ATTACK-LFI" = "LFI" 
    "REQUEST-931-APPLICATION-ATTACK-RFI" = "RFI" 
    "REQUEST-932-APPLICATION-ATTACK-RCE" = "RCE" 
    "REQUEST-933-APPLICATION-ATTACK-PHP" = "PHP" 
    "REQUEST-941-APPLICATION-ATTACK-XSS" = "XSS" 
    "REQUEST-942-APPLICATION-ATTACK-SQLI" = "SQLI" 
    "REQUEST-943-APPLICATION-ATTACK-SESSION-FIXATION" = "FIX" 
    "REQUEST-944-APPLICATION-ATTACK-JAVA" = "JAVA" 
    "REQUEST-921-PROTOCOL-ATTACK" = "PROTOCOL-ATTACK" 
    "REQUEST-911-METHOD-ENFORCEMENT" = "METHOD-ENFORCEMENT" 
    "REQUEST-920-PROTOCOL-ENFORCEMENT" = "PROTOCOL-ENFORCEMENT" 
    "REQUEST-913-SCANNER-DETECTION" = $null # No direct mapping 
    "Known-CVEs" = "MS-ThreatIntel-CVEs" 
    "General" = "General" 
    } 
    if ($groupMap.ContainsKey($SourceGroupName)) { 
        return $groupMap[$SourceGroupName] 
    } else { 
        return $SourceGroupName # No known mapping 
        } 
    }

使用下列 PowerShell 程式碼來定義規則的覆寫，從現有的規則集版本複製覆寫：

$groupOverrides = @() 
foreach ($group in $currentManagedRuleset.RuleGroupOverrides) {
  $mappedGroupName = Get-DrsRuleGroupName $group.RuleGroupName 
    foreach ($existingRule in $group.Rules) { 
if (-not (Test-RuleIsRemovedFromDRS21 $existingRule.RuleId $currentVersion)) 
  { 
   `$existingGroup = $groupOverrides | 
Where-Object { $_.RuleGroupName -eq $mappedGroupName } 
if ($existingGroup) { 
if (-not ($existingGroup.Rules | 
Where-Object { $_.RuleId -eq $existingRule.RuleId })) { 
$existingGroup.Rules.Add($existingRule) } } 
else { 
  $newGroup = New-AzApplicationGatewayFirewallPolicyManagedRuleGroupOverride ` -RuleGroupName $mappedGroupName ` -Rule @($existingRule) $groupOverrides += $newGroup } } } }

使用下列 PowerShell 程式碼複製現有的排除項目，並將其套用至 DRS 2.1：

# Create new exclusion objects
$newRuleSetExclusions = @()

if ($currentExclusions -ne $null -and $currentExclusions.Count -gt 0)
{
	foreach ($exclusion in $currentExclusions) {
		$newExclusion = New-AzApplicationGatewayFirewallPolicyExclusion `
			-MatchVariable $exclusion.MatchVariable `
			-SelectorMatchOperator $exclusion.SelectorMatchOperator `
			-Selector $exclusion.Selector

		# Migrate scopes: RuleSet, RuleGroup, or individual Rules
		if ($exclusion.ExclusionManagedRuleSets) {
			foreach ($scope in $exclusion.ExclusionManagedRuleSets) {
				# Create RuleGroup objects from existing RuleGroups
				$ruleGroups = @()
				foreach ($group in $scope.RuleGroups) {
					$drsGroupName = Get-DrsRuleGroupName $group.RuleGroupName
					if ($drsGroupName)
					{
							$exclusionRules = @()
							foreach ($rule in $group.Rules) 
							{
								if (-not (Test-RuleIsRemovedFromDRS21 $rule.RuleId "3.2"))
								{
								$exclusionRules += New-AzApplicationGatewayFirewallPolicyExclusionManagedRule `
									-RuleId $rule.RuleId
								}
							}
						if ($exclusionRules -ne $null -and $exclusionRules.Count -gt 0)
						{
							$ruleGroups += New-AzApplicationGatewayFirewallPolicyExclusionManagedRuleGroup `
							-Name $drsGroupName `
							-Rule $exclusionRules
						} else {
							$ruleGroups += New-AzApplicationGatewayFirewallPolicyExclusionManagedRuleGroup `
							-Name $drsGroupName
						}
					}
				}

				# Create the ManagedRuleSet scope object with the updated RuleGroups
				if ($ruleGroups.Count -gt 0) {
					$newRuleSetScope = New-AzApplicationGatewayFirewallPolicyExclusionManagedRuleSet `
						-Type "Microsoft_DefaultRuleSet" `
						-Version "2.1" `
						-RuleGroup $ruleGroups
				}

				# Add to the new exclusion object
				$newExclusion.ExclusionManagedRuleSets += $newRuleSetScope
			}
		}

		if (-not $newExclusion.ExclusionManagedRuleSets)
		{
			$newExclusion.ExclusionManagedRuleSets = @()
		}

		$newRuleSetExclusions += $newExclusion
	}
}

安全地驗證新規則

升級時，新的 DRS 2.1 規則預設為作用中。如果您的 WAF 處於預防模式，請先將新規則設定 為記錄 模式。記錄模式可讓您在啟用封鎖之前檢閱記錄。

下列 PowerShell 定義適用於 DRS 2.1 中引進的規則，與每個 CRS 版本相比：

# Added in DRS 2.1 compared to CRS 3.0 
$rulesAddedInThisVersionByGroup = @{ 
    "General" = @("200002", "200003") 
    "PROTOCOL-ENFORCEMENT" = @("920121", "920171", "920181", "920341", "920470", "920480", "920500") 
    "PROTOCOL-ATTACK" = @("921190", "921200") 
    "RCE" = @("932180") 
    "PHP" = @("933200", "933210") 
    "NODEJS" = @("934100") 
    "XSS" = @("941101", "941360", "941370", "941380") 
    "SQLI" = @("942361", "942470", "942480", "942500", "942510") 
    "JAVA" = @("944100", "944110", "944120", "944130", "944200", "944210", "944240", "944250") 
    "MS-ThreatIntel-WebShells" = @("99005002", "99005003", "99005004", "99005005", "99005006") 
    "MS-ThreatIntel-AppSec" = @("99030001", "99030002") 
    "MS-ThreatIntel-SQLI" = @("99031001", "99031002", "99031003", "99031004") 
    "MS-ThreatIntel-CVEs" = @( "99001001","99001002","99001003","99001004","99001005","99001006", "99001007","99001008","99001009","99001010","99001011","99001012", "99001013","99001014","99001015","99001016","99001017" ) 
}

# Added in DRS 2.1 compared to CRS 3.1 
    $rulesAddedInThisVersionByGroup = @{ 
    "General" = @("200002", "200003") 
    "PROTOCOL-ENFORCEMENT" = @("920181", "920500") 
    "PROTOCOL-ATTACK" = @("921190", "921200") 
    "PHP" = @("933200", "933210") 
    "NODEJS" = @("934100") 
    "XSS" = @("941360", "941370", "941380") 
    "SQLI" = @("942500", "942510") 
    "MS-ThreatIntel-WebShells" = @("99005002", "99005003", "99005004", "99005005", "99005006") 
    "MS-ThreatIntel-AppSec" = @("99030001", "99030002") 
    "MS-ThreatIntel-SQLI" = @("99031001", "99031002", "99031003", "99031004") "MS-ThreatIntel-CVEs" = @( "99001001","99001002","99001003","99001004","99001005","99001006", "99001007","99001008","99001009","99001010","99001011","99001012", "99001013","99001014","99001015","99001016","99001017" ) 
}

# Added in DRS 2.1 compared to CRS 3.2 
$rulesAddedInThisVersionByGroup = @{ 
    "General" = @("200002", "200003") 
    "PROTOCOL-ENFORCEMENT" = @("920181", "920500") 
    "PROTOCOL-ATTACK" = @("921190", "921200") 
    "PHP" = @("933200", "933210") 
    "NODEJS" = @("934100") 
    "XSS" = @("941360", "941370", "941380") 
    "SQLI" = @("942100", "942500", "942510") 
    "MS-ThreatIntel-WebShells" = @("99005002", "99005003", "99005004", "99005005", "99005006") 
    "MS-ThreatIntel-AppSec" = @("99030001", "99030002") 
    "MS-ThreatIntel-SQLI" = @("99031001", "99031002", "99031003", "99031004") 
    "MS-ThreatIntel-CVEs" = @( "99001001","99001002","99001003","99001004","99001005","99001006", "99001007","99001008","99001009","99001010","99001011","99001012", "99001013","99001014","99001015","99001016","99001017" ) 
}

使用下列 PowerShell 程式碼，將新的規則覆寫新增至先前定義的現有 $groupOverrides 物件：

foreach ($groupName in $rulesAddedInDRS21.Keys) { 
    $ruleOverrides = @() 
    foreach ($ruleId in $rulesAddedInDRS21[$groupName]) { 
        $alreadyExists = $existingOverrides | 
            Where-Object { $_.RuleId -eq $ruleId } 
        if (-not $alreadyExists) { 
            $ruleOverrides += New-AzApplicationGatewayFirewallPolicyManagedRuleOverride ` 
            -RuleId $ruleId ` 
            -Action "Log" ` 
            -State "Enabled" 
            } 
        } # Only create group override if we added rules to it 
    if ($ruleOverrides.Count -gt 0) { 
        $groupOverrides += New-AzApplicationGatewayFirewallPolicyManagedRuleGroupOverride ` 
            -RuleGroupName $groupName ` 
            -Rule $ruleOverrides } 
            }

套用自訂和升級

定義更新的 Azure WAF 原則物件，合併重複和更新的規則覆寫和排除：

$managedRuleSet = New-AzApplicationGatewayFirewallPolicyManagedRuleSet ` 
    -RuleSetType "Microsoft_DefaultRuleSet" ` 
    -RuleSetVersion "2.1" ` 
    -RuleGroupOverride $groupOverrides 
for ($i = 0; $i -lt $wafPolicy.ManagedRules.ManagedRuleSets.Count; $i++) { 
    if ($wafPolicy.ManagedRules.ManagedRuleSets[$i].RuleSetType -eq "OWASP") { 
    $wafPolicy.ManagedRules.ManagedRuleSets[$i] = $managedRuleSet 
    break 
    } 
} 
# Assign to policy
if ($newRuleSetExclusions) {
    $wafPolicy.ManagedRules.Exclusions = $currentExclusions + $newRuleSetExclusions 
}
# Apply the updated WAF policy 
Set-AzApplicationGatewayFirewallPolicy -InputObject $wafPolicy

意見反應

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Last updated on 2025-08-28