Set-DnsServerResponseRateLimiting

Set-DnsServerResponseRateLimiting

Enables RRL on a DNS server.

構文

Parameter Set: SetDnsServerRRL1
Set-DnsServerResponseRateLimiting [-CimSession <CimSession[]> ] [-ComputerName <String> ] [-ErrorsPerSec <UInt32> ] [-Force] [-InformationAction <ActionPreference> {SilentlyContinue | Stop | Continue | Inquire | Ignore | Suspend} ] [-InformationVariable <String> ] [-IPv4PrefixLength <UInt32> ] [-IPv6PrefixLength <UInt32> ] [-LeakRate <UInt32> ] [-MaximumResonsesPerWindow <UInt32> ] [-Mode <String> {LogOnly | Enable | Disable} ] [-PassThru] [-ResetToDefault] [-ResponsesPerSec <UInt32> ] [-ThrottleLimit <Int32> ] [-TruncateRate <UInt32> ] [-WindowInSec <UInt32> ] [-Confirm] [-WhatIf] [ <CommonParameters>] [ <WorkflowParameters>]

詳細説明

The Set-DnsServerResponseRateLimiting cmdlet enables Response Rate Limiting (RRL) on a Windows DNS server.

パラメーター

-CimSession<CimSession[]>

リモート セッションまたはリモート コンピューターでコマンドレットを実行します。コンピューター名またはセッション オブジェクト (New-CimSession コマンドレットや Get-CimSession コマンドレットの出力など) を入力します。既定値は、ローカル コンピューター上の現在のセッションです。

-ComputerName<String>

Specifies a remote DNS server. You can specify an IP address or any value that resolves to an IP address, such as a fully qualified domain name (FQDN), host name, or NetBIOS name.

-ErrorsPerSec<UInt32>

Specifies the maximum number of times that the server can send an error response to a client within a one-second interval. The error responses include: REFUSED, FORMERR and SERVFAIL

-Force

ユーザーの確認を求めることなく、コマンドを強制的に実行します。

-InformationAction<ActionPreference>

Specifies how this cmdlet responds to an information event. このパラメーターに指定できる値は、次のとおりです。

-- SilentlyContinue
-- Stop
-- Continue
-- Inquire
-- Ignore
-- Suspend

-InformationVariable<String>

Specifies a variable in which to store an information event message.

-IPv4PrefixLength<UInt32>

Specifies the IPv4 prefix length, which indicates the size of the subnet in which the incoming queries are grouped. The server applies RRL if queries resulting in the same response occur more frequently than expected in a specified time window. The default value of this parameter is 24.

-IPv6PrefixLength<UInt32>

Specifies the IPv6 prefix length, which indicates the size of the IPv6 subnet in which the incoming queries are grouped. The server applies RRL if queries resulting in the same response occur more frequently than expected in a specified time window. The default value of this parameter is 56.

-LeakRate<UInt32>

Specifies the rate at which the server responds to dropped queries. For queries that meet criteria to be dropped due to RRL, the DNS server still responds once per LeakRate queries. For example, if LeakRate is 3, the server responds to one in every 3 queries. The allowed range for LeakRate is 2 to 10. If LeakRate is set to zero, then no responses are 'leaked' by RRL. LeakRate leaves a chance for the victims in the same subnet as the forged IP address to get responses to their valid queries. The default value for LeakRate is 3.

-MaximumResonsesPerWindow<UInt32>

Specifies the maximum number of responses that the server sends to a subnet-domain address in a RRL time window. This puts an upper limit on responses in cases where the magnitude of attack is so high that even the leaked responses are enough to cause a reflection attack. The default value is 1024 responses per window.

-Mode<String>

Specifies the state of RRL on the DNS server. このパラメーターに指定できる値は、次のとおりです。 Enable, or Disable, or LogOnly. If the mode is set to LogOnly the DNS server performs all the RRL calculations but instead of taking the preventive actions (dropping or truncating responses), it only logs the potential actions as if RRL were enabled and continues with the normal responses. The default value is Enable.

-PassThru

作業中の項目を表すオブジェクトを返します。既定では、このコマンドレットから出力は生成されません。

-ResetToDefault

Indicates that this cmdlet sets all the RRL settings to their default values.

-ResponsesPerSec<UInt32>

Specifies the maximum number of times that the server sends a client the same response within a one-second interval.

-ThrottleLimit<Int32>

コマンドレットを実行する際に確立できる同時実行操作の最大数を指定します。このパラメーターを省略するか、値 0 を入力した場合、コンピューター上で実行されている CIM コマンドレットの数に基づいて、コマンドレットに最適なスロットル制限が Windows PowerShell® によって計算されます。スロットル制限は、セッションやコンピューターではなく、現在のコマンドレットにのみ適用されます。

-TruncateRate<UInt32>

Specifies the rate at which the server responds with truncated responses. For queries that meet the criteria to be dropped due to RRL, the DNS server still responds with truncated responses once per TruncateRate queries. For example, if TruncateRate is 2, one in every 2 queries receives a truncated response. The TruncateRate parameter provides the valid clients a way to reconnect using TCP. The allowed range for TruncateRate is 2 to 10. If it is set to 0, then this behaviour is disabled. The default value is 2.

-WindowInSec<UInt32>

Specifies the period (in seconds) over which rates are measured and averaged for RRL. RRL is applied if queries from same subnet, resulting in same response, occur more frequently than expected in a specified time window. The default value is 5.

-Confirm

コマンドレットを実行する前に確認メッセージを表示します。

-WhatIf

コマンドレットが実行された場合に何が起きるのかを示します。コマンドレットは実行されません。

<CommonParameters>

このコマンドレットは共通のパラメーターをサポートしています(-Verbose、-Debug、-ErrorAction、-ErrorVariable、-OutBuffer、および -OutVariable)。詳細については、TechNet の「 「about_CommonParameters」 (https://go.microsoft.com/fwlink/p/?LinkID=113216) を参照してください。

<WorkflowParameters>

入力

入力型は、コマンドレットにパイプできるオブジェクトの型です。

出力

出力型は、コマンドレットが出力するオブジェクトの型です。

• Microsoft.Management.Infrastructure.CimInstance#DnsServerResponseRateLimiting

  Microsoft.Management.Infrastructure.CimInstance オブジェクトは、Windows Management Instrumentation (WMI) オブジェクトを表示するラッパー クラスです。基になる WMI オブジェクトの名前空間とクラス名は、シャープ記号 (#) に続くパスで指定されます。

使用例

Example 1: Set RRL parameters on a DNS server

This command sets the RRL parameters on the DNS Server.

PS C:\> Set-DnsServerResponseRateLimiting -WindowInSec 7 -LeakRate 4 -TruncateRate 3 -ErrorsPerSec 8 -ResponsesPerSec 8                         

Example 2: Reset RRL settings to default values

This command resets all the RRL parameters on the DNS Server to default values.

PS C:\> Set-DnsServerResponseRateLimiting -ResetToDefault                        

Example 3: Set RRL to LogOnly mode

This command sets the RRL on the DNS server to LogOnly mode.

PS C:\> Set-DnsServerRRL -Mode LogOnly                        

関連項目

Add-DnsServerResponseRateLimitingExceptionlist

Get-DnsServerResponseRateLimiting

Set-DnsServerResponseRateLimitingExceptionlist