TMA-EXCHANGE-2.3.4

Ensure 'Enable automatic forwards to remote domains' is set to 'False'

高レベル 1自動exchange

説明

This policy setting is used to determine if the server can send automatic forwards to remote domains. Prints the number of remote domains where AutoForwardEnabled is not False (expected 0). Automatic forwarding to external domains is a common exfiltration path. Every remote domain (including Default) is checked. Run on a Mailbox server (organization-wide objects are read from AD). Run from an Exchange Management Shell or after `Add-PSSnapin Microsoft.Exchange.Management.PowerShell.SnapIn`; the audit loads the snap-in itself when Get-ExchangeServer is missing and fails if it cannot.

チェック方法

監査方法: シェルコマンド

shell

$ErrorActionPreference = 'Stop'; if (-not (Get-Command Get-ExchangeServer -ErrorAction SilentlyContinue)) { Add-PSSnapin Microsoft.Exchange.Management.PowerShell.SnapIn -ErrorAction Stop }; if (-not (Get-Command Get-ExchangeServer -ErrorAction SilentlyContinue)) { throw 'Exchange Management Shell cmdlets are not available' }; $bad = @(Get-RemoteDomain -ErrorAction Stop | Where-Object { $_.AutoForwardEnabled -ne $false }); $bad.Count

期待される出力: 0

修正方法

修正方法: ガイダンスまたは IaC パッチ

Set-RemoteDomain '<RemoteDomain>' -AutoForwardEnabled $false

プロパティ

オペレーティングシステム: すべて
タグ: exchangeremote-domains
参照: CIS Microsoft Exchange Server 2019 Benchmark v1.0.1 - 2.3.4 Ensure 'Enable automatic forwards to remote domains' is set to 'False'

このホストをチェック

監査が許可されているマシンで実行してください。スキャンは読み取り専用です。

shell

tmaegis scan --target exchange