IPFYI
:53 (TCP/UDP)

DNS

Low Risk

TCP/UDP — DNS

On this page

Port Overview

Port Number 53
Service Name DNS
Transport Protocol TCP/UDP
Category DNS
Security Risk Low
Port Range Well-Known (0-1023)

What is Port 53?

Domain Name System. Translates human-readable domain names (e.g., example.com) into IP addresses. TCP is used for zone transfers and large responses; UDP for standard queries.

TCP/UDP DNS Commonly Used

Security Considerations

Port 53 (DNS) 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.