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// Other services

Port 4793: Ultra Ethernet Transport

Port 4793 is assigned by IANA to uet (Ultra Ethernet Transport).

4793

How uet works

Other services
client:4793uetresponse client:4793uetresponse

The client sends a request to port 4793 and the uet 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 4793 dangerous?

We have no specific security note for port 4793. 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 4793

ServicePortTransportDescriptionReferenceUpdated
uet 4793 UDP Ultra Ethernet Transport - 2025-06-16
-4793-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 4793, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4793'      # process listening on 4793
sudo lsof -nP -i :4793

macOS

sudo lsof -nP -i :4793

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4793 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4793
netstat -ano | findstr :4793

From another machine

nmap -p 4793 -sV <host>
sudo nmap -sU -p 4793 <host>
nc -zv <host> 4793

Block it in the firewall

sudo ufw deny 4793/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4793" -Direction Inbound -LocalPort 4793 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 4793 used for?

Port 4793 is assigned by IANA to uet (Ultra Ethernet Transport).

Is port 4793 TCP or UDP?

Port 4793 is registered for UDP.

Is it safe to open port 4793?

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 4793 is open?

On Linux run "ss -ltnup 'sport = :4793'", on macOS "lsof -nP -i :4793", and on Windows "netstat -ano | findstr :4793" to see the local process. From another machine, "nmap -p 4793 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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