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// Other services

Port 2762: DICOM TLS

Port 2762 is assigned by IANA to dicom-tls (DICOM TLS).

2762

How dicom-tls works

Other services
client:2762dicom-tlsresponse client:2762dicom-tlsresponse

The client sends a request to port 2762 and the dicom-tls 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 2762 dangerous?

We have no specific security note for port 2762. 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 2762

ServicePortTransportDescriptionReferenceUpdated
dicom-tls 2762 TCP, UDP DICOM TLS - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2762, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2762'      # process listening on 2762
sudo lsof -nP -i :2762

macOS

sudo lsof -nP -i :2762

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2762 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2762
netstat -ano | findstr :2762

From another machine

nmap -p 2762 -sV <host>
sudo nmap -sU -p 2762 <host>
nc -zv <host> 2762

Block it in the firewall

sudo ufw deny 2762/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2762" -Direction Inbound -LocalPort 2762 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2762 used for?

Port 2762 is assigned by IANA to dicom-tls (DICOM TLS).

Is port 2762 TCP or UDP?

Port 2762 is registered for TCP and UDP.

Is it safe to open port 2762?

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 2762 is open?

On Linux run "ss -ltnup 'sport = :2762'", on macOS "lsof -nP -i :2762", and on Windows "netstat -ano | findstr :2762" to see the local process. From another machine, "nmap -p 2762 <host>" shows whether it is reachable.

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