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Port 2234 (directplay)

IANA assigns port 2234 to directplay: DirectPlay.

Registered (user) port, 1024-49151 TCPUDP

IANA assignment

Service nameProtoDescriptionAssigneeReference
directplay TCP DirectPlay Ajay Jindal -
directplay UDP DirectPlay Ajay Jindal -

Check what is listening on port 2234

Linux: is anything listening on TCP 2234?
sudo ss -tlnp 'sport = :2234'
Linux: UDP 2234
sudo ss -ulnp 'sport = :2234'
Linux / macOS: which process owns the port
sudo lsof -nP -i :2234
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':2234 '
Windows (Command Prompt)
netstat -ano | findstr :2234
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 2234 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 2234
From Windows
Test-NetConnection HOST -Port 2234
UDP probe (no reply does not prove it is closed)
nc -vzu -w 5 HOST 2234

Block port 2234 in the firewall

ufw
sudo ufw deny 2234/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 2234 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 2234 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 2234' -Direction Inbound -Protocol TCP -LocalPort 2234 -Action Block
ufw
sudo ufw deny 2234/udp
iptables
sudo iptables -A INPUT -p udp --dport 2234 -j DROP
nftables
sudo nft add rule inet filter input udp dport 2234 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block UDP 2234' -Direction Inbound -Protocol UDP -LocalPort 2234 -Action Block

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