Port 9500ismserver

Port 9500 is assigned to the obscure ISM Server service registered by Ian Gordon.

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

Technical Details

what runs on :9500

ismserver is registered on port :9500 over tcp and udp to Ian Gordon 3. 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 :9500

this machine

# linux
sudo ss -tulpn 'sport = :9500'

# macos / bsd
sudo lsof -nP -i :9500

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :9500

another host

nmap -sV -p T:9500 <host>
sudo nmap -sU -sV -p U:9500 <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 :9500

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 :9500 yet

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

Record

iana registry entry

port: :9500
service: ismserver
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP and UDP port 9500 to the service name "ismserver," registered to Ian Gordon. Public information about the implementation and deployment context is not established; internet-wide scans observe it only rarely.
lookups: 0rank 993
added: 2026-08-30
updated: 2026-08-30
references: IANA service name registry — port 9500

Something wrong?

This record is maintained by the engineers who use port 9500. 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 2026-08-30.

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 :9500, by lookups.

port	service	proto	category	risk	views
:9535	LANDesk Remote Control	TCPUDP	Remote Access	caution	11.1k
:9561	Network Time System	TCPUDP	Network Services	safe	8.3k
:9536	IP Fabrics Buffering	TCPUDP	Security	caution	4.4k
:9444	WSO2 ESB Administration Console	TCPUDPtls	Web Services	risk	0
:9443	WSO2 Tungsten HTTPS	TCPUDPtls	Web Services	risk	0

risk mix of the 5 listed

safe20%
caution40%
risk40%

2 of 5 encrypted

Port :9500ismserver

Technical Details

Security Information

Related Ports

Port 9500ismserver