CyberHunter
Local dataset, no network
// Other services

Port 592: Eudora Set

Port 592 is assigned by IANA to eudora-set (Eudora Set).

592

How eudora-set works

Other services
client:592eudora-setresponse client:592eudora-setresponse

The client sends a request to port 592 and the eudora-set 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 592 dangerous?

We have no specific security note for port 592. 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 592

ServicePortTransportDescriptionReferenceUpdated
eudora-set 592 TCP, UDP Eudora Set - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 592, and is it reachable?

Linux

sudo ss -ltnup 'sport = :592'      # process listening on 592
sudo lsof -nP -i :592

macOS

sudo lsof -nP -i :592

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 592 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 592
netstat -ano | findstr :592

From another machine

nmap -p 592 -sV <host>
sudo nmap -sU -p 592 <host>
nc -zv <host> 592

Block it in the firewall

sudo ufw deny 592/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 592" -Direction Inbound -LocalPort 592 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 592 used for?

Port 592 is assigned by IANA to eudora-set (Eudora Set).

Is port 592 TCP or UDP?

Port 592 is registered for TCP and UDP.

Is it safe to open port 592?

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 592 is open?

On Linux run "ss -ltnup 'sport = :592'", on macOS "lsof -nP -i :592", and on Windows "netstat -ano | findstr :592" to see the local process. From another machine, "nmap -p 592 <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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