Azure PowerShell kullanarak Web Uygulaması Güvenlik Duvarı ilkelerini yükseltme

Bu betik, BIR WAF yapılandırmasından veya yalnızca özel kurallar waf ilkesinden tam WAF ilkesine geçişi kolaylaştırır. Portalda WAF ilkesine yükseltme yazan bir uyarı görebilirsiniz veya Geomatch özel kuralları, site başına WAF ilkesi ve URI başına WAF ilkesi veya bot risk azaltma kural kümesi gibi yeni WAF özelliklerini isteyebilirsiniz. Bu özelliklerden herhangi birini kullanmak için uygulama ağ geçidinizle ilişkilendirilmiş tam bir WAF ilkesine sahip olmanız gerekir.

Yeni bir WAF ilkesi oluşturma hakkında daha fazla bilgi için bkz. Application Gateway için Web Uygulaması Güvenlik Duvarı ilkeleri oluşturma. Geçiş hakkında bilgi için bkz . WAF ilkesine yükseltme.

Geçiş betiğini kullanarak WAF ilkesine yükseltmek için

Geçiş betiğini çalıştırmak için aşağıdaki adımları kullanın:

1. Aşağıdaki Cloud Shell penceresini açın veya portalın içinden bir pencere açın.
2. Betiği Cloud Shell penceresine kopyalayın ve çalıştırın.
3. Betikte Abonelik Kimliği, Kaynak Grubu adı, WAF yapılandırmasının ilişkili olduğu Application Gateway adı ve oluşturduğunuz yeni WAF ilkesinin adı istenir. Bu girişleri girdikten sonra betik çalışır ve yeni WAF ilkenizi oluşturur
4. Yeni WAF ilkesinin uygulama ağ geçidinizle ilişkilendirildiğinden emin olun. Portalda WAF ilkesine gidin ve İlişkili Uygulama Ağ Geçitleri sekmesini seçin. Application Gateway'in WAF ilkesiyle ilişkili olduğunu doğrulayın.

Not

Betik, aşağıdaki koşullar varsa geçişi tamamlamaz:

• Kural kümesinin tamamı devre dışı bırakıldı. Geçişi tamamlamak için kural grubunun tamamının devre dışı bırakılmadığından emin olun.

Daha fazla bilgi için betikteki ValidateInput işlevine bakın.

<#PSScriptInfo
.DESCRIPTION
Will be used to upgrade to the application-gateway to a top level waf policy experience.

.VERSION 1.0

.GUID b6fedd43-ebd0-41ed-9847-4f1c1c43be22

.AUTHOR Venkat.Krishnan

.PARAMETER subscriptionId 
Subscription Id of where the resources are present.
.PARAMETER resourceGroupName
Resource-group where the resources are present.
.PARAMETER applicationGatewayName
Application-Gateway name
.PARAMETER wafPolicyName
Name of the web application firewall policy

.EXAMPLE
./migrateToWafPolicy.ps1 -subscriptionId  <your-subscription-id> -applicationGatewayName <your-appgw-name> -resourceGroupName <your-resource-group-name> -wafPolicyName <new-waf-policy-name>
#>

param(
    [Parameter(Mandatory=$true)]
    [string] $subscriptionId,
    [Parameter(Mandatory=$true)]
    [string] $resourceGroupName,
    [Parameter(Mandatory=$true)]
    [string] $applicationGatewayName,
    [Parameter(Mandatory=$true)]
    [string] $wafPolicyName
)

function ValidateInput ($appgwName, $resourceGroupName) {
    # Obtain the application-gateway
    $appgw = Get-AzApplicationGateway -Name $applicationGatewayName -ResourceGroupName $resourceGroupName
    if (-not $appgw) {
        Write-Error "ApplicationGateway: $applicationGatewayName is not present in ResourceGroup: $resourceGroupName"
        return $false
    }

    # Check if already have a global firewall policy
    if ($appgw.FirewallPolicy) {
        $fp = Get-AzResource -ResourceId $appgw.FirewallPolicy.Id
        if ($fp.PolicySettings) {
            Write-Error "ApplicationGateway: $applicationGatewayName already has a global firewall policy: $fp.Name. Please use portal for changing the policy."
            return $false
        }
    }

    if ($appgw.WebApplicationFirewallConfiguration) {
        # Throw an error, since ruleGroup disabled case can't be migrated now.
        if ($appgw.WebApplicationFirewallConfiguration.DisabledRuleGroups) {
            foreach ($disabled in $appgw.WebApplicationFirewallConfiguration.DisabledRuleGroups) {
                if ($disabled.Rules.Count -eq 0) {
                    $ruleGroupName = $disabled.RuleGroupName
                    Write-Error "The ruleGroup '$ruleGroupName' is disabled. Currently we can't upgrade to a firewall policy when an entire ruleGroup is disabled. This feature will be delivered shortly. To continue, kindly ensure the entire rulegroups are not disabled. "
                    return $false
                }
            }
        }
    }

    if ($appgw.Sku.Name -ne "WAF_v2" -or $appgw.Sku.Tier -ne "WAF_v2") {
        Write-Error " Cannot associate a firewall policy to application gateway :$applicationGatewayName since the Sku is not on WAF_v2"
        return $false
    }

    return $true
}

function Login() {
    $context = Get-AzContext
    if ($null -eq $context -or $null -eq $context.Account) {
        Login-AzAccount
    }
}

function createNewTopLevelWafPolicy ($subscriptionId, $resourceGroupName, $applicationGatewayName, $wafPolicyName) {
    Select-AzSubscription -Subscription $subscriptionId
    $retVal = ValidateInput -appgwName $applicationGatewayName -resourceGroupName $resourceGroupName
    if (!$retVal) {
        return
    }

    $appgw = Get-AzApplicationGateway -Name $applicationGatewayName -ResourceGroupName $resourceGroupName

    # Get the managedRule and PolicySettings
    $managedRule = New-AzApplicationGatewayFirewallPolicyManagedRule
    $policySetting = New-AzApplicationGatewayFirewallPolicySetting
    if ($appgw.WebApplicationFirewallConfiguration) {
        $ruleGroupOverrides = [System.Collections.ArrayList]@()
        if ($appgw.WebApplicationFirewallConfiguration.DisabledRuleGroups) {
            foreach ($disabled in $appgw.WebApplicationFirewallConfiguration.DisabledRuleGroups) {
                $rules = [System.Collections.ArrayList]@()
                if ($disabled.Rules.Count -gt 0) {
                    foreach ($rule in $disabled.Rules) {
                        $ruleOverride = New-AzApplicationGatewayFirewallPolicyManagedRuleOverride -RuleId $rule
                        $_ = $rules.Add($ruleOverride)
                    }
                }
                
                $ruleGroupOverride = New-AzApplicationGatewayFirewallPolicyManagedRuleGroupOverride -RuleGroupName $disabled.RuleGroupName -Rule $rules
                $_ = $ruleGroupOverrides.Add($ruleGroupOverride)
            }
        }

        $managedRuleSet = New-AzApplicationGatewayFirewallPolicyManagedRuleSet -RuleSetType $appgw.WebApplicationFirewallConfiguration.RuleSetType -RuleSetVersion $appgw.WebApplicationFirewallConfiguration.RuleSetVersion 
        if ($ruleGroupOverrides.Count -ne 0) {
            $managedRuleSet = New-AzApplicationGatewayFirewallPolicyManagedRuleSet -RuleSetType $appgw.WebApplicationFirewallConfiguration.RuleSetType -RuleSetVersion $appgw.WebApplicationFirewallConfiguration.RuleSetVersion -RuleGroupOverride $ruleGroupOverrides
        }
    
        $exclusions = [System.Collections.ArrayList]@()  
        if ($appgw.WebApplicationFirewallConfiguration.Exclusions) {
            foreach ($excl in $appgw.WebApplicationFirewallConfiguration.Exclusions) {
                if ($excl.MatchVariable -and $excl.SelectorMatchOperator -and $excl.Selector) {
                    $exclusionEntry = New-AzApplicationGatewayFirewallPolicyExclusion -MatchVariable  $excl.MatchVariable -SelectorMatchOperator $excl.SelectorMatchOperator -Selector $excl.Selector
                    $_ = $exclusions.Add($exclusionEntry)
                }

                if ($excl.MatchVariable -and !$excl.SelectorMatchOperator -and !$excl.Selecto) {
                    # Equals Any exclusion
                    $exclusionEntry = New-AzApplicationGatewayFirewallPolicyExclusion -MatchVariable  $excl.MatchVariable -SelectorMatchOperator "EqualsAny" -Selector "*"
                    $_ = $exclusions.Add($exclusionEntry)
                }
            }
        }
    
        $managedRule = New-AzApplicationGatewayFirewallPolicyManagedRule -ManagedRuleSet $managedRuleSet
        $exclCount = $exclusions.Count
        if ($exclCount -ne 0) {
            $managedRule = New-AzApplicationGatewayFirewallPolicyManagedRule -ManagedRuleSet $managedRuleSet -Exclusion $exclusions
        }

        
        $policySetting = New-AzApplicationGatewayFirewallPolicySetting -MaxFileUploadInMb $appgw.WebApplicationFirewallConfiguration.FileUploadLimitInMb -MaxRequestBodySizeInKb $appgw.WebApplicationFirewallConfiguration.MaxRequestBodySizeInKb -Mode Detection -State Disabled
        if ($appgw.WebApplicationFirewallConfiguration.FirewallMode -eq "Prevention") {
            $policySetting.Mode = "Prevention"
        }

        if ($appgw.WebApplicationFirewallConfiguration.Enabled) {
            $policySetting.State = "Enabled"
        }

        $policySetting.RequestBodyCheck = $appgw.WebApplicationFirewallConfiguration.RequestBodyCheck;
    }

    if ($appgw.FirewallPolicy) {
        $customRulePolicyId = $appgw.FirewallPolicy.Id
        $rg = Get-AzResourceGroup -Name $resourceGroupName
        $crPolicyName = $customRulePolicyId.Substring($customRulePolicyId.LastIndexOf("/") + 1)
        $customRulePolicy = Get-AzApplicationGatewayFirewallPolicy -ResourceGroupName $rg.ResourceGroupName -Name $crPolicyName
        $wafPolicy = New-AzApplicationGatewayFirewallPolicy -ResourceGroupName $rg.ResourceGroupName -Name $wafPolicyName -CustomRule $customRulePolicy.CustomRules -ManagedRule $managedRule -PolicySetting $policySetting -Location $appgw.Location
    } else { 
        $wafPolicy = New-AzApplicationGatewayFirewallPolicy -Name $wafPolicyName -ResourceGroupName $resourceGroupName -PolicySetting $policySetting -ManagedRule $managedRule -Location $appgw.Location
    }

    if (!$wafPolicy) {
        return
    }

    $appgw.WebApplicationFirewallConfiguration = $null
    $appgw.FirewallPolicy = $wafPolicy
    $appgw = Set-AzApplicationGateway -ApplicationGateway $appgw
    Write-Host " firewallPolicy: $wafPolicyName has been created/updated successfully and applied to applicationGateway: $applicationGatewayName!"
    return $wafPolicy
}

function Main() {
    Login
    $policy = createNewTopLevelWafPolicy -subscriptionId $subscriptionId -resourceGroupName $resourceGroupName -applicationGatewayName $applicationGatewayName -wafPolicyName $wafPolicyName
    return $policy
}

Main

Sonraki adımlar

WEB UYGULAMASı GÜVENLIK DUVARı CRS kural grupları ve kuralları hakkında daha fazla bilgi edinin.