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// Other services

Port 7727: Trident Systems Data

Port 7727 is assigned by IANA to trident-data (Trident Systems Data).

7727

How trident-data works

Other services
client:7727trident-dataresponse client:7727trident-dataresponse

The client sends a request to port 7727 and the trident-data 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 7727 dangerous?

We have no specific security note for port 7727. 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 7727

ServicePortTransportDescriptionReferenceUpdated
trident-data 7727 TCP, UDP Trident Systems Data - 2005-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 7727, and is it reachable?

Linux

sudo ss -ltnup 'sport = :7727'      # process listening on 7727
sudo lsof -nP -i :7727

macOS

sudo lsof -nP -i :7727

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 7727 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 7727
netstat -ano | findstr :7727

From another machine

nmap -p 7727 -sV <host>
sudo nmap -sU -p 7727 <host>
nc -zv <host> 7727

Block it in the firewall

sudo ufw deny 7727/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 7727" -Direction Inbound -LocalPort 7727 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 7727 used for?

Port 7727 is assigned by IANA to trident-data (Trident Systems Data).

Is port 7727 TCP or UDP?

Port 7727 is registered for TCP and UDP.

Is it safe to open port 7727?

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 7727 is open?

On Linux run "ss -ltnup 'sport = :7727'", on macOS "lsof -nP -i :7727", and on Windows "netstat -ano | findstr :7727" to see the local process. From another machine, "nmap -p 7727 <host>" shows whether it is reachable.

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