Port 8894 (ddi-tcp-7, ddi-udp-7)

IANA assigns port 8894 to ddi-tcp-7, ddi-udp-7: Desktop Data TCP 6: COAL application.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference

ddi-tcp-7 TCP Desktop Data TCP 6: COAL application Fred Yao -

ddi-udp-7 UDP Desktop Data UDP 6: COAL application Fred Yao -

Linux: is anything listening on TCP 8894?

sudo ss -tlnp 'sport = :8894'

Linux: UDP 8894

sudo ss -ulnp 'sport = :8894'

Linux / macOS: which process owns the port

sudo lsof -nP -i :8894

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':8894 '

Windows (Command Prompt)

netstat -ano | findstr :8894

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 8894 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 8894

From Windows

Test-NetConnection HOST -Port 8894

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

nc -vzu -w 5 HOST 8894

ufw

sudo ufw deny 8894/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 8894 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 8894 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 8894' -Direction Inbound -Protocol TCP -LocalPort 8894 -Action Block

ufw

sudo ufw deny 8894/udp

iptables

sudo iptables -A INPUT -p udp --dport 8894 -j DROP

nftables

sudo nft add rule inet filter input udp dport 8894 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block UDP 8894' -Direction Inbound -Protocol UDP -LocalPort 8894 -Action Block

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