Port 1172 (dnap)

IANA assigns port 1172 to dnap: DNA Protocol.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

dnap TCP DNA Protocol David McLaughlin -

dnap UDP DNA Protocol David McLaughlin -

Registry dates for this port: registered 2004-11.

Linux: is anything listening on TCP 1172?

sudo ss -tlnp 'sport = :1172'

Linux: UDP 1172

sudo ss -ulnp 'sport = :1172'

Linux / macOS: which process owns the port

sudo lsof -nP -i :1172

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':1172 '

Windows (Command Prompt)

netstat -ano | findstr :1172

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1172 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 1172

From Windows

Test-NetConnection HOST -Port 1172

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

nc -vzu -w 5 HOST 1172

ufw

sudo ufw deny 1172/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 1172 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 1172 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 1172' -Direction Inbound -Protocol TCP -LocalPort 1172 -Action Block

ufw

sudo ufw deny 1172/udp

iptables

sudo iptables -A INPUT -p udp --dport 1172 -j DROP

nftables

sudo nft add rule inet filter input udp dport 1172 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 1172' -Direction Inbound -Protocol UDP -LocalPort 1172 -Action Block

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