Is port 63 (Whois++) dangerous?

Port 63 is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose with standard security practices.

Should port 63 be open on my firewall?

Port 63 is generally safe to have open. Apply standard security practices: keep software updated and monitor access logs.

What transport protocol does port 63 use?

Port 63 (Whois++) uses the TCP transport protocol and falls under the Other category.

:63 (TCP)

Whois++

Low Risque

TCP — Other

Aperçu du port

Numéro de port 63

Nom du service Whois++

Protocole de transport TCP

Catégorie Other

Risque de sécurité Low

Plage de ports Bien connu (0-1023)

Qu'est-ce que le port 63?

Whois++ was an extended version of the WHOIS protocol designed to provide richer directory queries across distributed databases. It was standardized in RFC 1834 and RFC 1835 as an improvement over the basic WHOIS on port 43. The service never gained widespread adoption and is considered obsolete today.

TCP Other

Considérations de sécurité

Le port 63 (Whois++) est classifié comme risque faible. Ce service utilise le chiffrement ou présente une surface d'attaque minimale, le rendant relativement sûr à exposer.

Recommandation : Les pratiques de sécurité standard s'appliquent. Maintenez les logiciels à jour et surveillez les accès.

Ports associés — Other

35 Private Printer Server 43 WHOIS 75 Private Dial-Out Service 78 VetTCP 91 MIT-DOV 92 NPP 104 DICOM 105 CCSO Nameserver

Termes associés

ASN BGP Hijack Data Center Domain Name Dual Stack Internet Exchange Point (IXP)