Port 744FLEXlm License Manager

FLEXlm license-manager traffic for checking out and returning software licenses.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 4/10
lookups: 0

also known as FlexNet Publisher, FLEXlm license server, FLEXlm licensing

Technical Details

what runs on :744

FLEXlm uses a proprietary request/response protocol, normally over TCP; the registry also lists UDP for this assignment, though standard deployments generally use TCP. A client contacts the license manager, is directed to a vendor daemon when necessary, and performs license checkout, status, heartbeat, and return operations. Common FLEXlm installations use ports in the 27000–27009 range, while vendor-daemon ports are configurable; port 744 is an assigned service port rather than a universal modern default.

Security Information

exposure of :744

risk score

4/ 10caution

worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.

system averages 3.3 across 469 ports — this one sits 0.7 above.

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

FLEXlm traffic is not encrypted by default. License servers should normally be restricted to authorized application hosts and kept off the public Internet; exposed instances may reveal licensing and product information, permit license denial or exhaustion, and inherit vulnerabilities from the particular FLEXlm or vendor-daemon version.

Record

iana registry entry

port: :744
service: FLEXlm License Manager
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 4/10caution
category: System
usage: FLEXlm, now commonly branded FlexNet Publisher, serves floating software licenses to clients and vendor-specific daemons. Engineers encounter it in CAD, engineering, scientific, and other commercial software deployments, usually on an internal license server.
lookups: 0rank 994
added: 2026-08-25
updated: 2026-08-25
references: IANA service name registry — port 744

Something wrong?

This record is maintained by the engineers who use port 744. 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 2026-08-25.

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 469 in system →

the 8 most looked-up other ports in system — 469 ports carry that label.

port	service	proto	category	risk	views
:8888	Sun Answerbook & Alt HTTP	TCP	Web Services	caution	123.9k
:4664	Google Desktop Search	TCP	System	caution	67.2k
:8008	IBM HTTP Server Admin	TCP	Web Services	caution	58.3k
:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:9080	WebSphere HTTP Transport (default)	TCP	Web Services	caution	51.6k
:23	Telnet	TCP	Remote Access	caution	34.8k
:12489	NSClient Monitoring Agent	TCP	Network Services	caution	30.0k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :744FLEXlm License Manager

Technical Details

Security Information

Related Ports

Port 744FLEXlm License Manager