Port 3104Autocue Logger Protocol

The Autocue Logger Protocol is an obscure TCP service with no widely documented public deployment.

transport: tcp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

1 other service is registered on port 3104. compare all 2 →

Technical Details

what runs on :3104

Autocue Logger Protocol is registered on port :3104 over tcp. 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 :3104

this machine

# linux
sudo ss -tlpn 'sport = :3104'

# macos / bsd
sudo lsof -nP -i :3104

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :3104

another host

nmap -sV -p T:3104 <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 :3104

risk score

1/ 10safe

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

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

every listening transport is another surface to filter at the edge

security overview

no security notes recorded for :3104 yet

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

Record

iana registry entry

port: :3104
service: Autocue Logger Protocol
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP port 3104 to the Autocue Logger Protocol, but records no registrant. There is little established public information about what systems run it.
lookups: 0rank 993
added: 2026-09-27
updated: 2026-09-27
references: IANA service name registry — port 3104

Something wrong?

This record is maintained by the engineers who use port 3104. 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 2026-09-27.

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

browse categories →

ports registered around :3104, by lookups.

port	service	proto	category	risk	views
:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k
:3128	Squid Proxy HTTP	TCP	Web Services	caution	45.8k
:3100	Tatsoft HTTP Port	TCP	Web Services	caution	19.4k
:3074	Xbox Live / Games for Windows	TCPUDP	Gaming	caution	10.9k
:3050	Interbase/Firebird gds_db	TCPUDP	Databases	caution	10.7k
:3051	Galaxy Server	TCPUDP	Web Services	caution	10.2k
:3101	BlackBerry BES Cloud Comm	TCP	Cloud	caution	7.1k
:3052	APC 3052	TCPUDP	System	safe	0

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :3104Autocue Logger Protocol

Technical Details

Security Information

Related Ports

Port 3104Autocue Logger Protocol