Is port 42 (WINS / nameserver) dangerous?

Port 42 is classified as medium risk. It is commonly exposed but consider using encrypted alternatives where available and monitor activity.

Should port 42 be open on my firewall?

Port 42 can be open but should be monitored closely. Keep the service updated and prefer encrypted alternatives where available.

What transport protocol does port 42 use?

Port 42 (WINS / nameserver) uses the TCP/UDP transport protocol and falls under the DNS category.

:42 (TCP/UDP)

WINS / nameserver

Medium Riesgo

TCP/UDP — DNS

Resumen del puerto

Número de puerto 42

Nombre del servicio WINS / nameserver

Protocolo de transporte TCP/UDP

Categoría DNS

Riesgo de seguridad Medium

Rango de puertos Conocidos (0-1023)

Qué es el puerto 42?

Originally assigned as the Host Name Server protocol on ARPANET, port 42 was later repurposed by Microsoft for Windows Internet Name Service (WINS), which resolves NetBIOS names to IP addresses. WINS is a legacy name resolution system superseded by DNS and Active Directory. Exposure of WINS on the internet poses reconnaissance and potential exploitation risks.

TCP/UDP DNS

Consideraciones de seguridad

El puerto 42 (WINS / nameserver) está clasificado como riesgo medio. Aunque este servicio se expone comúnmente, considera usar alternativas cifradas cuando estén disponibles.

Recomendación: Mantén el servicio actualizado. Monitorea los registros en busca de actividad inusual.

Puertos relacionados — DNS

53 DNS 101 NIC Host Name 202 AT-NBP 206 AT-ZIS 558 SDNSKMP 634 GINAD 853 DNS over TLS 953 RNDC

Términos relacionados

A Record AAAA Record Authoritative DNS Server CNAME Record DNS DNS Resolver