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IPFYI
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853

DNS over TLS

Low Risk

TCP — DNS

Port Overview

Port Number 853
Service Name DNS over TLS
Transport Protocol TCP
Category DNS
Security Risk Low
Port Range Well-Known (0-1023)

What is Port 853?

DNS over TLS (DoT). Encrypts DNS queries between client and recursive resolver using TLS, preventing eavesdropping and manipulation of DNS traffic.

TCP DNS Commonly Used

Security Considerations

Port 853 (DNS over TLS) 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.

Related Ports — DNS

42 WINS / nameserver 53 DNS 101 NIC Host Name 953 RNDC 1512 WINS 2053 Knetd / DNS over TLS 5353 mDNS (Multicast DNS) 5355 LLMNR (Link-Local Multicast Name Resolution)
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