CyberHunter
LinkedIn profile - Bastien Cordier Email: contact@bastiencordier.pro
// Other services

Port 1743: Cinema Graphics License Manager

Port 1743 is assigned by IANA to cinegrfx-lm (Cinema Graphics License Manager).

1743

How cinegrfx-lm works

Other services
client:1743cinegrfx-lmresponse client:1743cinegrfx-lmresponse

The client sends a request to port 1743 and the cinegrfx-lm service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 1743 dangerous?

We have no specific security note for port 1743. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 1743

ServicePortTransportDescriptionReferenceUpdated
cinegrfx-lm 1743 TCP, UDP Cinema Graphics License Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1743, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1743'      # process listening on 1743
sudo lsof -nP -i :1743

macOS

sudo lsof -nP -i :1743

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1743 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1743
netstat -ano | findstr :1743

From another machine

nmap -p 1743 -sV <host>
sudo nmap -sU -p 1743 <host>
nc -zv <host> 1743

Block it in the firewall

sudo ufw deny 1743/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1743" -Direction Inbound -LocalPort 1743 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1743 used for?

Port 1743 is assigned by IANA to cinegrfx-lm (Cinema Graphics License Manager).

Is port 1743 TCP or UDP?

Port 1743 is registered for TCP and UDP.

Is it safe to open port 1743?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 1743 is open?

On Linux run "ss -ltnup 'sport = :1743'", on macOS "lsof -nP -i :1743", and on Windows "netstat -ano | findstr :1743" to see the local process. From another machine, "nmap -p 1743 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

Latest vulnerability news

All news