Port 4014TAI Clock Protocol

A lightweight time service used by Daniel J. Bernstein’s taiclock tools to provide TAI timestamps; it is not standard NTP.

inNetwork Services

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

Technical Details

what runs on :4014

TAI Clock is a small client/server time protocol: clients query a server for the current TAI time, represented using the TAI64 timestamp family. IANA lists both TCP and UDP on port 4014. It is distinct from NTP and does not use NTP's packet format; deployments are uncommon, and the exact wire exchange depends on the implementation.

Security Information

exposure of :4014

risk score

2/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

network services averages 2.7 across 1,476 ports — this one sits 0.7 below.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

The protocol does not provide encryption or authenticated time replies by default. A forged response could mislead a client that trusts this server for time, so restrict access to intended clients and do not treat an exposed service as a trusted time source without an independent authentication mechanism.

Record

iana registry entry

port: :4014
service: TAI Clock Protocol
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services
usage: This port is assigned to the TAI Clock Protocol associated with Daniel J. Bernstein’s taiclock tools. It is an uncommon alternative time service, not a port engineers should assume is running NTP.
lookups: 0rank 993
added: 2026-10-02
updated: 2026-10-02
references: IANA service name registry — port 4014

Something wrong?

This record is maintained by the engineers who use port 4014. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-10-02.

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edit this record →back to the registry

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :4014TAI Clock Protocol

Technical Details

Security Information

Related Ports

Port 4014TAI Clock Protocol