Ensure the connection filter IP allow list is empty

OrtaDüzey 1Otomatikm365

Açıklama

Mail from IPs on the connection filter allow list skips spam filtering, so a compromised or shared IP becomes a phishing channel. Requires an already-connected Exchange Online session: Install-Module ExchangeOnlineManagement; Connect-ExchangeOnline (View-Only Organization Management is sufficient). The audit throws if no session exists.

Nasıl denetlenir

Denetim yöntemi: Kabuk komutu

shell

$ErrorActionPreference = 'Stop'; if (-not (Get-Command Get-ConnectionInformation -ErrorAction SilentlyContinue) -or -not (Get-ConnectionInformation)) { throw 'Not connected: run Connect-ExchangeOnline first' }; $p = Get-HostedConnectionFilterPolicy -Identity Default -ErrorAction Stop; @($p.IPAllowList | Where-Object { $_ }).Count

Beklenen çıktı: 0

Nasıl düzeltilir

Düzeltme yöntemi: Kılavuz veya altyapı yaması

Set-HostedConnectionFilterPolicy -Identity Default -IPAllowList @{} (use mail flow rules or Tenant Allow/Block List entries for justified exceptions).

Özellikler

İşletim sistemleri: Herhangi biri
Etiketler: m365mail-flow
Referans: CIS Microsoft 365 Foundations Benchmark v7.0.0 - Exchange Online Protection / Connection filter IP allow list (verify section number for your release)

Bu ana makineyi denetle

Bunu denetleme izniniz olan bir makinede çalıştırın. Tarama salt okunurdur.

shell

tmaegis scan --target m365