Port 7121Virtual Prototypes License Manager

License-manager service for Virtual Prototypes software on TCP and UDP port 7121.

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

also known as virprot-lm

Technical Details

what runs on :7121

Virtual Prototypes License Manager is registered on port :7121 over tcp and udp to Victor Galis. 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 :7121

this machine

# linux
sudo ss -tulpn 'sport = :7121'

# macos / bsd
sudo lsof -nP -i :7121

# windows (then: tasklist /FI "PID eq <pid>")
netstat -ano | findstr :7121

another host

nmap -sV -p T:7121 <host>
sudo nmap -sU -sV -p U:7121 <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 :7121

risk score

1/ 10safe

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

virtualization averages 3.7 across 34 ports — this one sits 2.7 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 :7121 yet

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

Record

iana registry entry

port: :7121
service: Virtual Prototypes License Manager
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Virtualization
usage: TCP and UDP port 7121 is assigned to the Virtual Prototypes License Manager. The assignment is registered to Victor Galis; public protocol and deployment details are not recorded here.
lookups: 0rank 993
added: 2026-09-14
updated: 2026-09-14
references: IANA service name registry — port 7121

Something wrong?

This record is maintained by the engineers who use port 7121. 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 2026-09-14.

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

all 34 in virtualization →

the 8 most looked-up other ports in virtualization — 34 ports carry that label.

port	service	proto	category	risk	views
:902	VMware vSphere Management	TCP	Remote Access	caution	28.7k
:902	VMware Console UDP	UDP	Remote Access	caution	28.0k
:1200	SCOL Name Service	TCP	Network Services	caution	15.5k
:2598	Citrix ICA Session Reliability	TCP	Remote Access	caution	11.0k
:4610	QualiSystems TestShell	TCP	Network Services	caution	10.8k
:657	IBM RMC	TCPUDP	Network Services	caution	10.0k
:8222	VMware Server UI (Insecure)		Web Services	caution	8.2k
:8333	VMware Server UI (Secure)		Web Services	caution	7.9k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :7121Virtual Prototypes License Manager

Technical Details

Security Information

Related Ports

Port 7121Virtual Prototypes License Manager