TMA-GWS-DMARC-RECORD

Ensure a DMARC policy of quarantine or reject is published

AltaNivel 1Automatizadagoogle-workspace

Descripción

An enforcing DMARC policy tells receivers to quarantine or reject mail that fails SPF/DKIM alignment, stopping direct-domain spoofing. Checked from any POSIX shell with dig: set DOMAIN to the mail domain (e.g. DOMAIN=example.com). Fails if DOMAIN is unset or dig is missing.

Cómo se verifica

Método de auditoría: Comando de shell

shell

command -v dig >/dev/null 2>&1 || exit 1; [ -n "$DOMAIN" ] || exit 1; out=$(dig +short TXT "_dmarc.$DOMAIN" 2>/dev/null) || exit 1; if printf '%s\n' "$out" | tr -d '" ' | grep -qiE '^v=DMARC1;(.*;)?p=(quarantine|reject)'; then echo compliant; else echo noncompliant; fi

Salida esperada: compliant

Cómo se corrige

Método de corrección: Guía o parche de infraestructura

Publish TXT at _dmarc.<domain>, starting with v=DMARC1; p=none; rua=mailto:dmarc@<domain> to collect reports, then move to p=quarantine and p=reject once all legitimate senders align.

Propiedades

Sistemas operativos: Cualquiera
Etiquetas: google-workspacemail-auth
Referencia: CIS Google Workspace Foundations Benchmark v1.4.0 - Gmail / DMARC policy (verify section number for your release)

Verificar este host

Ejecute esto en un equipo que tenga permiso para auditar. El escaneo es de solo lectura.

shell

tmaegis scan --target google-workspace