CyberHunter
Local dataset, no network
// Other services

Port 7544: FlowAnalyzer DisplayServer

Port 7544 is assigned by IANA to nta-ds (FlowAnalyzer DisplayServer).

7544

How nta-ds works

Other services
client:7544nta-dsresponse client:7544nta-dsresponse

The client sends a request to port 7544 and the nta-ds 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 7544 dangerous?

We have no specific security note for port 7544. 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 7544

ServicePortTransportDescriptionReferenceUpdated
nta-ds 7544 TCP, UDP FlowAnalyzer DisplayServer - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 7544, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7544'      # process listening on 7544
sudo lsof -nP -i :7544

macOS

sudo lsof -nP -i :7544

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7544 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7544
netstat -ano | findstr :7544

From another machine

nmap -p 7544 -sV <host>
sudo nmap -sU -p 7544 <host>
nc -zv <host> 7544

Block it in the firewall

sudo ufw deny 7544/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7544" -Direction Inbound -LocalPort 7544 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7544 used for?

Port 7544 is assigned by IANA to nta-ds (FlowAnalyzer DisplayServer).

Is port 7544 TCP or UDP?

Port 7544 is registered for TCP and UDP.

Is it safe to open port 7544?

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 7544 is open?

On Linux run "ss -ltnup 'sport = :7544'", on macOS "lsof -nP -i :7544", and on Windows "netstat -ano | findstr :7544" to see the local process. From another machine, "nmap -p 7544 <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

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