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Local dataset, no network
// Other services

Port 2933: 4-TIER OPM GW

Port 2933 is assigned by IANA to 4-tieropmgw (4-TIER OPM GW).

2933

How 4-tieropmgw works

Other services
client:29334-tieropmgwresponse client:29334-tieropmgwresponse

The client sends a request to port 2933 and the 4-tieropmgw 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 2933 dangerous?

We have no specific security note for port 2933. 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 2933

ServicePortTransportDescriptionReferenceUpdated
4-tieropmgw 2933 TCP, UDP 4-TIER OPM GW - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2933, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2933'      # process listening on 2933
sudo lsof -nP -i :2933

macOS

sudo lsof -nP -i :2933

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2933 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2933
netstat -ano | findstr :2933

From another machine

nmap -p 2933 -sV <host>
sudo nmap -sU -p 2933 <host>
nc -zv <host> 2933

Block it in the firewall

sudo ufw deny 2933/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2933" -Direction Inbound -LocalPort 2933 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2933 used for?

Port 2933 is assigned by IANA to 4-tieropmgw (4-TIER OPM GW).

Is port 2933 TCP or UDP?

Port 2933 is registered for TCP and UDP.

Is it safe to open port 2933?

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 2933 is open?

On Linux run "ss -ltnup 'sport = :2933'", on macOS "lsof -nP -i :2933", and on Windows "netstat -ano | findstr :2933" to see the local process. From another machine, "nmap -p 2933 <host>" shows whether it is reachable.

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