Port 2704SMS remote control

SMS remote control service assigned to TCP and UDP port 2704.

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

also known as sms-remctrl

Technical Details

what runs on :2704

SMS remote control is registered on port :2704 over tcp and udp to Tom Friend. 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 :2704

this machine

# linux
sudo ss -tulpn 'sport = :2704'

# macos / bsd
sudo lsof -nP -i :2704

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :2704

another host

nmap -sV -p T:2704 <host>
sudo nmap -sU -sV -p U:2704 <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 :2704

risk score

1/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

remote access averages 3.6 across 188 ports — this one sits 2.6 below.

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 :2704 yet

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

Record

iana registry entry

port: :2704
service: SMS remote control
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Remote Access Mobile
usage: Port 2704 is assigned for an SMS remote-control service under the name SMS REMCTRL. The registration is held by Tom Friend; no public protocol or product details are recorded in the assignment.
lookups: 0rank 993
added: 2026-09-03
updated: 2026-09-03
references: IANA service name registry — port 2704

Something wrong?

This record is maintained by the engineers who use port 2704. 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 2026-09-03.

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

all 188 in remote access →

the 8 most looked-up other ports in remote access — 188 ports carry that label.

port	service	proto	category	risk	views
:8000	Intel Remote Desktop / Alternate HTTP Port	TCP	Web Services	safe	84.3k
:8888	D2GS Admin Console	TCP	Remote Access	caution	83.7k
:8881	Atlasz Secure Server	TCP	Web Services	caution	67.6k
:5938	TeamViewer	TCPUDP	Remote Access	caution	65.0k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:8008	IBM HTTP Server Admin	TCP	Web Services	caution	58.3k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:23	Telnet	TCP	Remote Access	caution	34.8k

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :2704SMS remote control

Technical Details

Security Information

Related Ports

Port 2704SMS remote control