Whois++
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TCP — Other
Port Overview
What is 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.
Security Considerations
Port 63 (Whois++) is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose.
Recommendation: Standard security practices apply. Keep software updated and monitor access.