Port 8500Flight Message Transfer Protocol

Port 8500 is assigned to the Flight Message Transfer Protocol (fmtp) over TCP and UDP.

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

also known as fmtp

1 other service is registered on port 8500. compare all 2 →

Technical Details

what runs on :8500

Flight Message Transfer Protocol is registered on port :8500 over tcp and udp to Eivan Cerasi, assigned December 2003. 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 :8500

this machine

# linux
sudo ss -tulpn 'sport = :8500'

# macos / bsd
sudo lsof -nP -i :8500

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :8500

another host

nmap -sV -p T:8500 <host>
sudo nmap -sU -sV -p U:8500 <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 :8500

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 :8500 yet

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

Record

iana registry entry

port: :8500
service: Flight Message Transfer Protocol
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: The fmtp assignment identifies TCP and UDP port 8500 for the Flight Message Transfer Protocol. It was registered to Eivan Cerasi on 2003-12-01; public deployment appears rare.
lookups: 0rank 993
added: 2026-09-08
updated: 2026-09-08
references: IANA service name registry — port 8500

Something wrong?

This record is maintained by the engineers who use port 8500. 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 2026-09-08.

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 :8500, by lookups.

port	service	proto	category	risk	views
:8484	MapleStory	TCPUDP	Gaming	caution	15.6k
:8500	ColdFusion Server	TCP	Web Services	caution	15.3k
:8443	Plesk/Tomcat SSL	TCPtls	Web Services	caution	14.2k
:8442	CyBro A-bus	TCPUDP	Network Services	caution	11.6k
:8501	DukesterX	TCP	File Transfer	caution	5.0k
:8474	AquaMinds NoteShare	TCPUDP	—	safe	0
:8471	PIM over Reliable Transport	TCPSCTP	Network Services	caution	0
:8473	Virtual Point to Point	TCPUDP	Network Services	safe	0

risk mix of the 8 listed

safe25%
caution75%

1 of 8 encrypted

Port :8500Flight Message Transfer Protocol

Technical Details

Security Information

Related Ports

Port 8500Flight Message Transfer Protocol