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// Other services

Port 2133: ZYMED-ZPP

Port 2133 is assigned by IANA to zymed-zpp (ZYMED-ZPP).

2133

How zymed-zpp works

Other services
client:2133zymed-zppresponse client:2133zymed-zppresponse

The client sends a request to port 2133 and the zymed-zpp 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 2133 dangerous?

We have no specific security note for port 2133. 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 2133

ServicePortTransportDescriptionReferenceUpdated
zymed-zpp 2133 TCP, UDP ZYMED-ZPP - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2133, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2133'      # process listening on 2133
sudo lsof -nP -i :2133

macOS

sudo lsof -nP -i :2133

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2133 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2133
netstat -ano | findstr :2133

From another machine

nmap -p 2133 -sV <host>
sudo nmap -sU -p 2133 <host>
nc -zv <host> 2133

Block it in the firewall

sudo ufw deny 2133/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2133" -Direction Inbound -LocalPort 2133 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2133 used for?

Port 2133 is assigned by IANA to zymed-zpp (ZYMED-ZPP).

Is port 2133 TCP or UDP?

Port 2133 is registered for TCP and UDP.

Is it safe to open port 2133?

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 2133 is open?

On Linux run "ss -ltnup 'sport = :2133'", on macOS "lsof -nP -i :2133", and on Windows "netstat -ano | findstr :2133" to see the local process. From another machine, "nmap -p 2133 <host>" shows whether it is reachable.

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