Port 8320 (tnp-discover)

IANA assigns port 8320 to tnp-discover: Thin(ium) Network Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

tnp-discover TCP Thin(ium) Network Protocol Aly Orady -

tnp-discover UDP Thin(ium) Network Protocol Aly Orady -

Registry dates for this port: registered 2007-08-07.

Linux: is anything listening on TCP 8320?

sudo ss -tlnp 'sport = :8320'

Linux: UDP 8320

sudo ss -ulnp 'sport = :8320'

Linux / macOS: which process owns the port

sudo lsof -nP -i :8320

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':8320 '

Windows (Command Prompt)

netstat -ano | findstr :8320

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8320 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 8320

From Windows

Test-NetConnection HOST -Port 8320

UDP probe (no reply does not prove it is closed)

nc -vzu -w 5 HOST 8320

ufw

sudo ufw deny 8320/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 8320 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 8320 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 8320' -Direction Inbound -Protocol TCP -LocalPort 8320 -Action Block

ufw

sudo ufw deny 8320/udp

iptables

sudo iptables -A INPUT -p udp --dport 8320 -j DROP

nftables

sudo nft add rule inet filter input udp dport 8320 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 8320' -Direction Inbound -Protocol UDP -LocalPort 8320 -Action Block

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