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// Other services

Port 6777: netTsunami Tracker

Port 6777 is assigned by IANA to ntz-tracker (netTsunami Tracker).

6777

How ntz-tracker works

Other services
client:6777ntz-trackerresponse client:6777ntz-trackerresponse

The client sends a request to port 6777 and the ntz-tracker service answers.

Transport
TCP
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 6777 dangerous?

We have no specific security note for port 6777. 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 6777

ServicePortTransportDescriptionReferenceUpdated
ntz-tracker 6777 TCP netTsunami Tracker - 2013-05-01
-6777-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 6777, and is it reachable?

Linux

sudo ss -ltnup 'sport = :6777'      # process listening on 6777
sudo lsof -nP -i :6777

macOS

sudo lsof -nP -i :6777

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6777 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 6777
netstat -ano | findstr :6777

From another machine

nmap -p 6777 -sV <host>
nc -zv <host> 6777

Block it in the firewall

sudo ufw deny 6777/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 6777" -Direction Inbound -LocalPort 6777 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 6777 used for?

Port 6777 is assigned by IANA to ntz-tracker (netTsunami Tracker).

Is port 6777 TCP or UDP?

Port 6777 is registered for TCP.

Is it safe to open port 6777?

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 6777 is open?

On Linux run "ss -ltnup 'sport = :6777'", on macOS "lsof -nP -i :6777", and on Windows "netstat -ano | findstr :6777" to see the local process. From another machine, "nmap -p 6777 <host>" shows whether it is reachable.

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