Port 3789RemoteDeploy Administration Port

Assigned for RemoteDeploy administration, with no established common public deployment or documented protocol behavior.

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

Technical Details

what runs on :3789

RemoteDeploy Administration Port is registered on port :3789 over tcp and udp to Detlef Rothe, assigned May 2009. 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 :3789

this machine

# linux
sudo ss -tulpn 'sport = :3789'

# macos / bsd
sudo lsof -nP -i :3789

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :3789

another host

nmap -sV -p T:3789 <host>
sudo nmap -sU -sV -p U:3789 <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 :3789

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 :3789 yet

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

Record

iana registry entry

port: :3789
service: RemoteDeploy Administration Port
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: IANA assigns TCP and UDP port 3789 to the RemoteDeploy Administration Port, registered to Detlef Rothe. No widely documented implementation or common use is known.
lookups: 0rank 993
added: 2026-10-02
updated: 2026-10-02
references: IANA service name registry — port 3789

Something wrong?

This record is maintained by the engineers who use port 3789. 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 2026-10-02.

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 :3789, by lookups.

port	service	proto	category	risk	views
:3784	Ventrilo	TCPUDP	Gaming	caution	4.9k
:3800	HGG Application Port	TCP	Network Services	caution	4.8k
:3785	Ventrilo Voice Chat	UDP	Gaming	caution	4.4k
:3801	IBM Manager Service	TCPUDP	System	safe	0
:3784	Bidirectional Forwarding Detection (BFD)	TCPUDP	Security	caution	0
:3734	Synel Data Collection	TCPUDP	—	safe	0
:3827	Netadmin Systems MPI service	TCPUDP	Network Services	safe	0
:3766	e-Watch SSL sitewatch server	TCPtls	Security	safe	0

risk mix of the 8 listed

safe50%
caution50%

1 of 8 encrypted

Port :3789RemoteDeploy Administration Port

Technical Details

Security Information

Related Ports

Port 3789RemoteDeploy Administration Port