Port 592Eudora Set

Eudora Set is the IANA-registered service assigned to TCP and UDP port 592.

Technical Details

what runs on :592

Eudora Set is registered on port :592 over tcp and udp to Randall Gellens. We don't have a technical write-up for it beyond the IANA registry entry.

In nmap's internet-wide scan data this port is found open rarely. What's listening is often not the registered service, so check before you assume.

find what's listening on :592

this machine

# linux
sudo ss -tulpn 'sport = :592'

# macos / bsd
sudo lsof -nP -i :592

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :592

another host

nmap -sV -p T:592 <host>
sudo nmap -sU -sV -p U:592 <host>

run it? the handshake, the implementations you meet in the wild and the flags that matter come from the engineers who do.

exposure of :592

risk score

1/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

email averages 3.2 across 62 ports — this one sits 2.2 below.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

no security notes recorded for :592 yet

known exploits, hardening advice, what a compromise looks like — suggest an edit if you know its exposure.

the 8 most looked-up other ports in email — 62 ports carry that label.

port	service	proto	category	risk	views
:143	IMAP	TCPUDP	Email	caution	20.7k
:995	POP3S	TCPtls	Email	caution	18.8k
:109	POP2	TCP	Email	caution	17.9k
:2096	cPanel SSL Webmail	TCPtls	Web Services	safe	17.4k
:110	POP3	TCP	Email	caution	15.5k
:993	IMAPS	TCPtls	Email	caution	14.5k
:1352	Lotus Notes RPC	TCP	Email	caution	12.3k
:24	Private Mail	TCPUDP	Email	caution	11.7k

risk mix of the 8 listed

3 of 8 encrypted