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// Other services

Port 9001: ETL Service Manager

Port 9001 is assigned by IANA to etlservicemgr (ETL Service Manager).

9001

How etlservicemgr works

Other services
client:9001etlservicemgrresponse client:9001etlservicemgrresponse

The client sends a request to port 9001 and the etlservicemgr 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 9001 dangerous?

We have no specific security note for port 9001. 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 9001

ServicePortTransportDescriptionReferenceUpdated
etlservicemgr 9001 TCP, UDP ETL Service Manager
Reported: Known Unauthorized Use on port 9001
 - 2002-03

// source: IANA service name and port number registry

03 Check it

Which program uses port 9001, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9001'      # process listening on 9001
sudo lsof -nP -i :9001

macOS

sudo lsof -nP -i :9001

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9001 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9001
netstat -ano | findstr :9001

From another machine

nmap -p 9001 -sV <host>
sudo nmap -sU -p 9001 <host>
nc -zv <host> 9001

Block it in the firewall

sudo ufw deny 9001/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9001" -Direction Inbound -LocalPort 9001 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9001 used for?

Port 9001 is assigned by IANA to etlservicemgr (ETL Service Manager).

Is port 9001 TCP or UDP?

Port 9001 is registered for TCP and UDP.

Is it safe to open port 9001?

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 9001 is open?

On Linux run "ss -ltnup 'sport = :9001'", on macOS "lsof -nP -i :9001", and on Windows "netstat -ano | findstr :9001" to see the local process. From another machine, "nmap -p 9001 <host>" shows whether it is reachable.

05 Related
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