CyberHunter
Local dataset, no network
// Other services

Port 494: POV-Ray

Port 494 is assigned by IANA to pov-ray (POV-Ray).

494

How pov-ray works

Other services
client:494pov-rayresponse client:494pov-rayresponse

The client sends a request to port 494 and the pov-ray 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 494 dangerous?

We have no specific security note for port 494. 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 494

ServicePortTransportDescriptionReferenceUpdated
pov-ray 494 TCP, UDP POV-Ray - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 494, and is it reachable?

Linux

sudo ss -ltnup 'sport = :494'      # process listening on 494
sudo lsof -nP -i :494

macOS

sudo lsof -nP -i :494

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 494 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 494
netstat -ano | findstr :494

From another machine

nmap -p 494 -sV <host>
sudo nmap -sU -p 494 <host>
nc -zv <host> 494

Block it in the firewall

sudo ufw deny 494/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 494" -Direction Inbound -LocalPort 494 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 494 used for?

Port 494 is assigned by IANA to pov-ray (POV-Ray).

Is port 494 TCP or UDP?

Port 494 is registered for TCP and UDP.

Is it safe to open port 494?

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 494 is open?

On Linux run "ss -ltnup 'sport = :494'", on macOS "lsof -nP -i :494", and on Windows "netstat -ano | findstr :494" to see the local process. From another machine, "nmap -p 494 <host>" shows whether it is reachable.

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