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Port 5567: DOF Protocol Stack Multicast/Secure Transport

Port 5567 is assigned by IANA to dof-dps-mc-sec (DOF Protocol Stack Multicast/Secure Transport).

5567

How dof-dps-mc-sec works

Other services
client:5567#%&@!x9response? client:5567#%&@!x9response?

The client sends a request to port 5567 and the dof-dps-mc-sec service answers. Everything is encrypted: someone on the path only sees unreadable bytes.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
EncryptedTLS or built-in crypto
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 5567 dangerous?

We have no specific security note for port 5567. 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 5567

ServicePortTransportDescriptionReferenceUpdated
dof-dps-mc-sec 5567 TCP, UDP DOF Protocol Stack Multicast/Secure Transport - 2015-04-23

// source: IANA service name and port number registry

03 Check it

Which program uses port 5567, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5567'      # process listening on 5567
sudo lsof -nP -i :5567

macOS

sudo lsof -nP -i :5567

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5567 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5567
netstat -ano | findstr :5567

From another machine

nmap -p 5567 -sV <host>
sudo nmap -sU -p 5567 <host>
nc -zv <host> 5567

Block it in the firewall

sudo ufw deny 5567/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5567" -Direction Inbound -LocalPort 5567 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5567 used for?

Port 5567 is assigned by IANA to dof-dps-mc-sec (DOF Protocol Stack Multicast/Secure Transport).

Is port 5567 TCP or UDP?

Port 5567 is registered for TCP and UDP.

Is it safe to open port 5567?

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 5567 is open?

On Linux run "ss -ltnup 'sport = :5567'", on macOS "lsof -nP -i :5567", and on Windows "netstat -ano | findstr :5567" to see the local process. From another machine, "nmap -p 5567 <host>" shows whether it is reachable.

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