Port 1066FPO-FNS

FPO-FNS is the IANA-registered service name for TCP and UDP port 1066; public protocol details are unavailable.

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

Technical Details

what runs on :1066

FPO-FNS is registered on port :1066 over tcp and udp to Jens Klose. 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 sometimes. What's listening is often not the registered service, so check before you assume.

find what's listening on :1066

this machine

# linux
sudo ss -tulpn 'sport = :1066'

# macos / bsd
sudo lsof -nP -i :1066

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :1066

another host

nmap -sV -p T:1066 <host>
sudo nmap -sU -sV -p U:1066 <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 :1066

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 :1066 yet

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

Record

iana registry entry

port: :1066
service: FPO-FNS
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: TCP and UDP port 1066 are assigned to the FPO-FNS service. The assignment is registered to Jens Klose, but no product, protocol documentation, or deployment context is recorded.
lookups: 0rank 993
added: 2026-08-20
updated: 2026-08-20
references: IANA service name registry — port 1066

Something wrong?

This record is maintained by the engineers who use port 1066. 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 2026-08-20.

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 :1066, by lookups.

port	service	proto	category	risk	views
:1080	SOCKS Proxy	TCPtls	Security	caution	16.1k
:1059	IBM AIX NIM	TCPUDP	Network Services	caution	15.6k
:1025	NFS / IIS / Teradata	TCP	Web Services	caution	14.4k
:1058	IBM AIX NIM	TCPUDP	Network Services	caution	13.5k
:1110	EasyBits School Discovery	UDP	Network Services	caution	11.1k
:1026	Microsoft DCOM	TCP	Security	caution	10.9k
:1002	Opsware Agent	TCP	System	caution	10.4k
:1029	Microsoft DCOM	TCP	Remote Access	caution	10.4k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :1066FPO-FNS

Technical Details

Security Information

Related Ports

Port 1066FPO-FNS