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Port 3394 (d2k-tapestry2)

IANA assigns port 3394 to d2k-tapestry2: D2K Tapestry Server to Server.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
d2k-tapestry2 TCP D2K Tapestry Server to Server Eric Lan -
d2k-tapestry2 UDP D2K Tapestry Server to Server Eric Lan -

Check what is listening on port 3394

Linux: is anything listening on TCP 3394?
sudo ss -tlnp 'sport = :3394'
Linux: UDP 3394
sudo ss -ulnp 'sport = :3394'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3394
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3394 '
Windows (Command Prompt)
netstat -ano | findstr :3394
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3394 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3394
From Windows
Test-NetConnection HOST -Port 3394
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3394

Block port 3394 in the firewall

ufw
sudo ufw deny 3394/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3394 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3394 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3394' -Direction Inbound -Protocol TCP -LocalPort 3394 -Action Block
ufw
sudo ufw deny 3394/udp
iptables
sudo iptables -A INPUT -p udp --dport 3394 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3394 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3394' -Direction Inbound -Protocol UDP -LocalPort 3394 -Action Block

Related ports

3392efi-lm3393d2k-tapestry13395dyna-lm3396printer-agent, printer_agent

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