CyberHunter
Local dataset, no network
// Other services

Port 5364: Microsoft Kernel Debugger

Port 5364 is assigned by IANA to kdnet (Microsoft Kernel Debugger).

5364

How kdnet works

Other services
client:5364kdnetresponse client:5364kdnetresponse

The client sends a request to port 5364 and the kdnet service answers.

Transport
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 5364 dangerous?

We have no specific security note for port 5364. 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 5364

ServicePortTransportDescriptionReferenceUpdated
kdnet 5364 UDP Microsoft Kernel Debugger - 2013-06-16
-5364-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 5364, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5364'      # process listening on 5364
sudo lsof -nP -i :5364

macOS

sudo lsof -nP -i :5364

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5364 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5364
netstat -ano | findstr :5364

From another machine

nmap -p 5364 -sV <host>
sudo nmap -sU -p 5364 <host>
nc -zv <host> 5364

Block it in the firewall

sudo ufw deny 5364/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5364" -Direction Inbound -LocalPort 5364 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 5364 used for?

Port 5364 is assigned by IANA to kdnet (Microsoft Kernel Debugger).

Is port 5364 TCP or UDP?

Port 5364 is registered for UDP.

Is it safe to open port 5364?

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 5364 is open?

On Linux run "ss -ltnup 'sport = :5364'", on macOS "lsof -nP -i :5364", and on Windows "netstat -ano | findstr :5364" to see the local process. From another machine, "nmap -p 5364 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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