Is port 3268 (Microsoft Global Catalog) dangerous?

Port 3268 is classified as high risk. It is a common target for automated scanning and brute-force attacks. Restrict access to trusted IPs if exposure is necessary.

Should port 3268 be open on my firewall?

Port 3268 should only be open with strict firewall rules whitelisting trusted IP addresses. Enable rate limiting and intrusion detection systems.

What transport protocol does port 3268 use?

Port 3268 (Microsoft Global Catalog) uses the TCP transport protocol and falls under the System & Infrastructure category.

:3268 (TCP)

Microsoft Global Catalog

High Riesgo

TCP — System & Infrastructure

Resumen del puerto

Número de puerto 3268

Nombre del servicio Microsoft Global Catalog

Protocolo de transporte TCP

Categoría System & Infrastructure

Riesgo de seguridad High

Rango de puertos Registrados (1024-49151)

Qué es el puerto 3268?

Port 3268 is used by Microsoft Active Directory for the Global Catalog service, which provides a partial replica of all objects in the directory forest. LDAP clients query the Global Catalog to locate objects across multiple domains. This port is essential for cross-domain authentication in Windows enterprise environments.

TCP System & Infrastructure De uso común

Consideraciones de seguridad

El puerto 3268 (Microsoft Global Catalog) está clasificado como alto riesgo. Este puerto es un objetivo común para escaneos automatizados y ataques de fuerza bruta. Si debes exponerlo, restringe el acceso a direcciones IP conocidas.

Recomendación: Usa reglas de firewall para agregar IPs de confianza a la lista blanca. Habilita la limitación de velocidad y la detección de intrusiones.

Puertos relacionados — System & Infrastructure

0 Reserved 1 TCPMUX 2 Management Utility 3 CompressNET 4 Unassigned 5 RJE 6 Unassigned 7 Echo

Términos relacionados

Bandwidth Latency Packet Loss Ping Throughput ASN