Port 15383ds-lm

Port 1538 is assigned to the 3ds-lm service over TCP and UDP.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

Technical Details

what runs on :1538

The service is registered for both TCP and UDP on port 1538. A 3D Studio client contacts the license manager to check out or validate a software license; the wire protocol and exact transport behavior are proprietary and can vary by product version. It is not a general-purpose web or file-transfer protocol, and no standard encryption or authentication behavior can be assumed.

Security Information

exposure of :1538

risk score

2/ 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

This service should generally be restricted to trusted hosts and networks. Exposing it publicly can disclose license-service behavior and permit unauthorized license requests or denial-of-service attempts; because the protocol's security properties are version-dependent, protect it with firewall rules rather than relying on transport encryption.

Record

iana registry entry

port: :1538
service: 3ds-lm
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: uncategorised
usage: This port is used by the 3DS License Manager for serving license requests from 3D Studio software clients. It is normally encountered on an internal workstation or license server rather than as a general Internet service.
lookups: 0rank 993
added: 2026-08-31
updated: 2026-09-22
references: IANA service name registry — port 1538

Something wrong?

This record is maintained by the engineers who use port 1538. 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 2026-09-22.

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 :1538, by lookups.

port	service	proto	category	risk	views
:1513	Garena Gaming	TCPUDP	Gaming	caution	33.1k
:1521	Oracle TNS Listener	TCP	Security	caution	19.6k
:1521	Oracle DB Listener	TCP	Databases	caution	18.4k
:1533	IBM Sametime & SQL Server	TCP	Network Services	safe	13.5k
:1526	Oracle Listener Alt Port	TCP	Databases	caution	13.0k
:1500	NetGuard GuardianPro Remote Management	TCP	Security	caution	12.7k
:1503	Live Messenger Whiteboard Sharing	TCPUDP	Network Services	caution	12.4k
:1501	NetGuard GuardianPro Auth Client	UDP	Security	caution	12.0k

risk mix of the 8 listed

safe13%
caution88%

0 of 8 encrypted

Port :15383ds-lm

Technical Details

Security Information

Related Ports

Port 15383ds-lm