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// Other services

Port 4942: Equitrac Office

Port 4942 is assigned by IANA to eq-office-4942 (Equitrac Office).

4942

How eq-office-4942 works

Other services
client:4942eq-office-4942response client:4942eq-office-4942response

The client sends a request to port 4942 and the eq-office-4942 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 4942 dangerous?

We have no specific security note for port 4942. 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 4942

ServicePortTransportDescriptionReferenceUpdated
eq-office-4942 4942 TCP, UDP Equitrac Office - 2007-07-11

// source: IANA service name and port number registry

03 Check it

Which program uses port 4942, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4942'      # process listening on 4942
sudo lsof -nP -i :4942

macOS

sudo lsof -nP -i :4942

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4942 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4942
netstat -ano | findstr :4942

From another machine

nmap -p 4942 -sV <host>
sudo nmap -sU -p 4942 <host>
nc -zv <host> 4942

Block it in the firewall

sudo ufw deny 4942/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4942" -Direction Inbound -LocalPort 4942 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4942 used for?

Port 4942 is assigned by IANA to eq-office-4942 (Equitrac Office).

Is port 4942 TCP or UDP?

Port 4942 is registered for TCP and UDP.

Is it safe to open port 4942?

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 4942 is open?

On Linux run "ss -ltnup 'sport = :4942'", on macOS "lsof -nP -i :4942", and on Windows "netstat -ano | findstr :4942" to see the local process. From another machine, "nmap -p 4942 <host>" shows whether it is reachable.

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