CyberHunter
Local dataset, no network
// Other services

Port 11201: smsqp

Port 11201 is assigned by IANA to smsqp (smsqp).

11201

How smsqp works

Other services
client:11201smsqpresponse client:11201smsqpresponse

The client sends a request to port 11201 and the smsqp service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 11201 dangerous?

We have no specific security note for port 11201. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 11201

ServicePortTransportDescriptionReferenceUpdated
smsqp 11201 TCP, UDP smsqp - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 11201, and is it reachable?

Linux

sudo ss -ltnup 'sport = :11201'      # process listening on 11201
sudo lsof -nP -i :11201

macOS

sudo lsof -nP -i :11201

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 11201 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 11201
netstat -ano | findstr :11201

From another machine

nmap -p 11201 -sV <host>
sudo nmap -sU -p 11201 <host>
nc -zv <host> 11201

Block it in the firewall

sudo ufw deny 11201/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 11201" -Direction Inbound -LocalPort 11201 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 11201 used for?

Port 11201 is assigned by IANA to smsqp (smsqp).

Is port 11201 TCP or UDP?

Port 11201 is registered for TCP and UDP.

Is it safe to open port 11201?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 11201 is open?

On Linux run "ss -ltnup 'sport = :11201'", on macOS "lsof -nP -i :11201", and on Windows "netstat -ano | findstr :11201" to see the local process. From another machine, "nmap -p 11201 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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