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// Other services

Port 5350: Port Control Protocol Multicast

Port 5350 is assigned by IANA to pcp-multicast (Port Control Protocol Multicast).

5350

How pcp-multicast works

Other services
client:5350pcp-multicastresponse client:5350pcp-multicastresponse

The client sends a request to port 5350 and the pcp-multicast 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 5350 dangerous?

We have no specific security note for port 5350. 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 5350

ServicePortTransportDescriptionReferenceUpdated
pcp-multicast 5350 UDP Port Control Protocol Multicast RFC 6887 -
-5350-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 5350, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5350'      # process listening on 5350
sudo lsof -nP -i :5350

macOS

sudo lsof -nP -i :5350

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5350 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5350
netstat -ano | findstr :5350

From another machine

nmap -p 5350 -sV <host>
sudo nmap -sU -p 5350 <host>
nc -zv <host> 5350

Block it in the firewall

sudo ufw deny 5350/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5350" -Direction Inbound -LocalPort 5350 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 5350 used for?

Port 5350 is assigned by IANA to pcp-multicast (Port Control Protocol Multicast).

Is port 5350 TCP or UDP?

Port 5350 is registered for UDP.

Is it safe to open port 5350?

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 5350 is open?

On Linux run "ss -ltnup 'sport = :5350'", on macOS "lsof -nP -i :5350", and on Windows "netstat -ano | findstr :5350" to see the local process. From another machine, "nmap -p 5350 <host>" shows whether it is reachable.

05 Related
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