Port 7500Silhouette User

TCP/UDP port 7500 is assigned to the Silhouette User service.

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

Technical Details

what runs on :7500

Silhouette User is registered on port :7500 over tcp and udp to Anthony Payne, assigned February 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 found open rarely. What's listening is often not the registered service, so check before you assume.

find what's listening on :7500

this machine

# linux
sudo ss -tulpn 'sport = :7500'

# macos / bsd
sudo lsof -nP -i :7500

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :7500

another host

nmap -sV -p T:7500 <host>
sudo nmap -sU -sV -p U:7500 <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 :7500

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 · udp

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

security overview

no security notes recorded for :7500 yet

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

Record

iana registry entry

port: :7500
service: Silhouette User
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: This assignment identifies TCP and UDP port 7500 as the Silhouette User service. It was registered to Anthony Payne in 2004; public deployment and usage details are not documented here.
lookups: 0rank 993
added: 2026-09-07
updated: 2026-09-07
references: IANA service name registry — port 7500

Something wrong?

This record is maintained by the engineers who use port 7500. 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 2026-09-07.

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 :7500, by lookups.

port	service	proto	category	risk	views
:7547	TR-069 CPE WAN Management	TCPUDP	Remote Access	caution	8.3k
:7443	Oracle Application Server HTTPS	TCPUDPtls	Web Services	risk	0
:7474	Neo4j HTTP	TCP	Web Services	risk	0
:7471	Stateless Transport Tunneling (STT)	TCP	Network Services	safe	0
:7473	Neo4j HTTPS	TCPUDPtls	Web Services	risk	0
:7549	Network Layer Signaling Transport Layer	TCPUDP	Network Services	safe	0
:7437	Faximum	TCPUDP	—	safe	0
:7501	HP OpenView Bus Daemon	TCPUDP	Network Services	safe	0

risk mix of the 8 listed

safe50%
caution13%
risk38%

2 of 8 encrypted

Port :7500Silhouette User

Technical Details

Security Information

Related Ports

Port 7500Silhouette User