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// Other services

Port 31016: Kollective Agent Kollective Delivery Protocol

Port 31016 is assigned by IANA to ka-kdp (Kollective Agent Kollective Delivery Protocol), ka-sddp (Kollective Agent Secure Distributed Delivery Protocol).

31016

How ka-kdp works

Other services
client:31016ka-kdpresponse client:31016ka-kdpresponse

The client sends a request to port 31016 and the ka-kdp service answers.

Transport
UDP · TCP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 31016 dangerous?

We have no specific security note for port 31016. 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 31016

ServicePortTransportDescriptionReferenceUpdated
ka-kdp 31016 UDP Kollective Agent Kollective Delivery Protocol - 2016-12-11
ka-sddp 31016 TCP Kollective Agent Secure Distributed Delivery Protocol - 2016-12-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 31016, and is it reachable?

Linux

sudo ss -ltnup 'sport = :31016'      # process listening on 31016
sudo lsof -nP -i :31016

macOS

sudo lsof -nP -i :31016

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 31016 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 31016
netstat -ano | findstr :31016

From another machine

nmap -p 31016 -sV <host>
sudo nmap -sU -p 31016 <host>
nc -zv <host> 31016

Block it in the firewall

sudo ufw deny 31016/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 31016" -Direction Inbound -LocalPort 31016 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 31016 used for?

Port 31016 is assigned by IANA to ka-kdp (Kollective Agent Kollective Delivery Protocol), ka-sddp (Kollective Agent Secure Distributed Delivery Protocol).

Is port 31016 TCP or UDP?

Port 31016 is registered for UDP and TCP.

Is it safe to open port 31016?

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 31016 is open?

On Linux run "ss -ltnup 'sport = :31016'", on macOS "lsof -nP -i :31016", and on Windows "netstat -ano | findstr :31016" to see the local process. From another machine, "nmap -p 31016 <host>" shows whether it is reachable.

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