Port 20001MicroSAN

MicroSAN service traffic uses TCP and UDP port 20001.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

Technical Details

what runs on :20001

MicroSAN is registered on port :20001 over tcp and udp to Thomas E Ludwig, assigned February 2004. 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 :20001

this machine

# linux
sudo ss -tulpn 'sport = :20001'

# macos / bsd
sudo lsof -nP -i :20001

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :20001

another host

nmap -sV -p T:20001 <host>
sudo nmap -sU -sV -p U:20001 <host>

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

add technical details

Security Information

exposure of :20001

risk score

1/ 10safe

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

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 :20001 yet

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

Record

iana registry entry

port: :20001
service: MicroSAN
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: uncategorised
usage: Port 20001 is assigned to the MicroSAN service over both TCP and UDP. The assignment is registered to Thomas E Ludwig; public protocol and deployment details are not specified.
lookups: 0rank 993
added: 2026-09-15
updated: 2026-09-15
references: IANA service name registry — port 20001

Something wrong?

This record is maintained by the engineers who use port 20001. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-09-15.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

browse categories →

ports registered around :20001, by lookups.

port	service	proto	category	risk	views
:20000	DNP3		Network Services	caution	13.6k
:19999	DNP3 Secure		Security	caution	12.0k
:20000	Usermin User Tool		Web Services	caution	8.9k
:20014	DART Reporting Server	TCP	Security	caution	6.8k
:20003	Commtact HTTPS	TCPUDPtls	Web Services	safe	0
:20034	NetBurner ID Port	TCPUDP	—	safe	0
:20048	NFS mount daemon	TCPUDP	File Transfer	risk	0
:20002	Commtact HTTP	TCPUDP	Web Services	safe	0

risk mix of the 8 listed

safe38%
caution50%
risk13%

1 of 8 encrypted

Port :20001MicroSAN

Technical Details

Security Information

Related Ports

Port 20001MicroSAN