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// Other services

Port 2047:

Port 2047 is assigned by IANA to dls ().

2047

How dls works

Other services
client:2047dlsresponse client:2047dlsresponse

The client sends a request to port 2047 and the dls 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 2047 dangerous?

We have no specific security note for port 2047. 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 2047

ServicePortTransportDescriptionReferenceUpdated
dls 2047 TCP, UDP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2047, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2047'      # process listening on 2047
sudo lsof -nP -i :2047

macOS

sudo lsof -nP -i :2047

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2047 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2047
netstat -ano | findstr :2047

From another machine

nmap -p 2047 -sV <host>
sudo nmap -sU -p 2047 <host>
nc -zv <host> 2047

Block it in the firewall

sudo ufw deny 2047/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2047" -Direction Inbound -LocalPort 2047 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2047 used for?

Port 2047 is assigned by IANA to dls ().

Is port 2047 TCP or UDP?

Port 2047 is registered for TCP and UDP.

Is it safe to open port 2047?

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 2047 is open?

On Linux run "ss -ltnup 'sport = :2047'", on macOS "lsof -nP -i :2047", and on Windows "netstat -ano | findstr :2047" to see the local process. From another machine, "nmap -p 2047 <host>" shows whether it is reachable.

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