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// Other services

Port 11001: Metasys

Port 11001 is assigned by IANA to metasys (Metasys).

11001

How metasys works

Other services
client:11001metasysresponse client:11001metasysresponse

The client sends a request to port 11001 and the metasys 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 11001 dangerous?

We have no specific security note for port 11001. 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 11001

ServicePortTransportDescriptionReferenceUpdated
metasys 11001 TCP, UDP Metasys - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 11001, and is it reachable?

Linux

sudo ss -ltnup 'sport = :11001'      # process listening on 11001
sudo lsof -nP -i :11001

macOS

sudo lsof -nP -i :11001

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 11001 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 11001
netstat -ano | findstr :11001

From another machine

nmap -p 11001 -sV <host>
sudo nmap -sU -p 11001 <host>
nc -zv <host> 11001

Block it in the firewall

sudo ufw deny 11001/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 11001" -Direction Inbound -LocalPort 11001 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 11001 used for?

Port 11001 is assigned by IANA to metasys (Metasys).

Is port 11001 TCP or UDP?

Port 11001 is registered for TCP and UDP.

Is it safe to open port 11001?

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 11001 is open?

On Linux run "ss -ltnup 'sport = :11001'", on macOS "lsof -nP -i :11001", and on Windows "netstat -ano | findstr :11001" to see the local process. From another machine, "nmap -p 11001 <host>" shows whether it is reachable.

05 Related
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