Port 6778 (ntz-p2p-storage)

IANA assigns port 6778 to ntz-p2p-storage: netTsunami p2p storage system.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference

ntz-p2p-storage TCP netTsunami p2p storage system Tomahawk Holdings -

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

Linux: is anything listening on TCP 6778?

sudo ss -tlnp 'sport = :6778'

Linux / macOS: which process owns the port

sudo lsof -nP -i :6778

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':6778 '

Windows (Command Prompt)

netstat -ano | findstr :6778

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 6778 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 6778

From Windows

Test-NetConnection HOST -Port 6778

ufw

sudo ufw deny 6778/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 6778 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 6778 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 6778' -Direction Inbound -Protocol TCP -LocalPort 6778 -Action Block

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Assignment data: IANA port number registry (public domain), retrieved 2026-11-10.