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Port 8881 (galaxy4d)

IANA assigns port 8881 to galaxy4d: Galaxy4D Online Game Engine.

Registered (user) port, 1024-49151 TCP

IANA assignment

Service nameProtoDescriptionAssigneeReference
galaxy4d TCP Galaxy4D Online Game Engine Galaxy4D -

Registry dates for this port: registered 2012-06-18.

Check what is listening on port 8881

Linux: is anything listening on TCP 8881?
sudo ss -tlnp 'sport = :8881'
Linux / macOS: which process owns the port
sudo lsof -nP -i :8881
Older Linux / BSD (net-tools)
sudo netstat -tlnp | grep ':8881 '
Windows (Command Prompt)
netstat -ano | findstr :8881
Windows (PowerShell)
Get-NetTCPConnection -LocalPort 8881 -State Listen | Select LocalAddress,OwningProcess

Test it from outside

From another machine
nc -vz -w 5 HOST 8881
From Windows
Test-NetConnection HOST -Port 8881

Block port 8881 in the firewall

ufw
sudo ufw deny 8881/tcp
iptables
sudo iptables -A INPUT -p tcp --dport 8881 -j DROP
nftables
sudo nft add rule inet filter input tcp dport 8881 drop
Windows Firewall
New-NetFirewallRule -DisplayName 'Block TCP 8881' -Direction Inbound -Protocol TCP -LocalPort 8881 -Action Block

Related ports

8873dxspider8880cddbp-alt8883MQTT over TLS8888HTTP alternate / Jupyter

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