Ensure the connection filter IP allow list is empty

보통레벨 1자동m365

설명

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.

점검 방법

감사 방식: 셸 명령

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

예상 출력: 0

조치 방법

조치 방식: 가이드 또는 인프라 패치

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

속성

운영 체제: 모두
태그: m365mail-flow
참고 자료: CIS Microsoft 365 Foundations Benchmark v7.0.0 - Exchange Online Protection / Connection filter IP allow list (verify section number for your release)

이 호스트 점검하기

감사 권한이 있는 시스템에서 실행하세요. 스캔은 읽기 전용입니다.

shell

tmaegis scan --target m365