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Port 6777 (ntz-tracker)

IANA assigns port 6777 to ntz-tracker: netTsunami Tracker.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
ntz-tracker TCP netTsunami Tracker Tomahawk Holdings -

Registry dates for this port: registered 2013-05-01.

Check what is listening on port 6777

Linux: is anything listening on TCP 6777?
sudo ss -tlnp 'sport = :6777'
Linux / macOS: which process owns the port
sudo lsof -nP -i :6777
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':6777 '
Windows (Command Prompt)
netstat -ano | findstr :6777
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 6777 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 6777
From Windows
Test-NetConnection HOST -Port 6777

Block port 6777 in the firewall

ufw
sudo ufw deny 6777/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 6777 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 6777 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 6777' -Direction Inbound -Protocol TCP -LocalPort 6777 -Action Block

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6770plysrv-http6771plysrv-https6778ntz-p2p-storage6784bfd-lag

All port numbers · Open port checker
Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.