Port 9318PKIX Time-Stamp over TLS

Port 9318 is assigned for PKIX time-stamping carried over TLS.

transport: tcp · udp
in transit: encrypted
assignment: official
risk: 1/10
lookups: 0

also known as secure-ts

Technical Details

what runs on :9318

PKIX Time-Stamp over TLS is registered on port :9318 over tcp and udp to Niklas Weiss, assigned November 2004. We don't have a technical write-up for it beyond the IANA registry entry.

In nmap's internet-wide scan data this port is never observed open, so if it's open on your network it's more likely a custom or misconfigured service than the registered one.

find what's listening on :9318

this machine

# linux
sudo ss -tulpn 'sport = :9318'

# macos / bsd
sudo lsof -nP -i :9318

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :9318

another host

nmap -sV -p T:9318 <host>
sudo nmap -sU -sV -p U:9318 <host>

run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.

add technical details

Security Information

exposure of :9318

risk score

1/ 10safe

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

security averages 3.0 across 422 ports — this one sits 2.0 below.

in transit

encrypted

payloads are protected on the wire

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

no security notes recorded for :9318 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

Record

iana registry entry

port: :9318
service: PKIX Time-Stamp over TLS
transport: TCPUDP
encryption: tls / encrypted
assignment: iana registered
risk: 1/10safe
category: Security
usage: The IANA assignment is for PKIX TimeStamp over TLS and is registered to Niklas Weiss. It has not been observed open in Nmap's internet-wide scan data.
lookups: 0rank 993
added: 2026-10-15
updated: 2026-10-15
references: IANA service name registry — port 9318

Something wrong?

This record is maintained by the engineers who use port 9318. 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 2026-10-15.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

all 422 in security →

the 8 most looked-up other ports in security — 422 ports carry that label.

port	service	proto	category	risk	views
:8881	Atlasz Secure Server	TCP	Web Services	caution	67.6k
:443	HTTPS	TCPtls	Web Services	caution	65.9k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:3128	Squid Proxy HTTP	TCP	Web Services	caution	45.8k
:8080	HTTP Alternate	TCP	Web Services	caution	44.9k
:7000	Vuze HTTPS Tracker	TCPtls	Security	caution	28.9k

risk mix of the 8 listed

caution100%

2 of 8 encrypted

Port :9318PKIX Time-Stamp over TLS

Technical Details

Security Information

Related Ports

Port 9318PKIX Time-Stamp over TLS