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Port 3393 (d2k-tapestry1)

IANA assigns port 3393 to d2k-tapestry1: D2K Tapestry Client to Server.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
d2k-tapestry1 TCP D2K Tapestry Client to Server - -
d2k-tapestry1 UDP D2K Tapestry Client to Server - -

Check what is listening on port 3393

Linux: is anything listening on TCP 3393?
sudo ss -tlnp 'sport = :3393'
Linux: UDP 3393
sudo ss -ulnp 'sport = :3393'
Linux / macOS: which process owns the port
sudo lsof -nP -i :3393
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':3393 '
Windows (Command Prompt)
netstat -ano | findstr :3393
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 3393 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 3393
From Windows
Test-NetConnection HOST -Port 3393
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 3393

Block port 3393 in the firewall

ufw
sudo ufw deny 3393/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 3393 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 3393 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 3393' -Direction Inbound -Protocol TCP -LocalPort 3393 -Action Block
ufw
sudo ufw deny 3393/udp
iptables
sudo iptables -A INPUT -p udp --dport 3393 -j DROP
nftables
sudo nft add rule inet filter input udp dport 3393 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 3393' -Direction Inbound -Protocol UDP -LocalPort 3393 -Action Block

Related ports

3391savant3392efi-lm3394d2k-tapestry23395dyna-lm

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