Port 25565 (Minecraft Java Edition)

Default port of Minecraft Java Edition servers (Bedrock uses UDP 19132).

Registered (user) port, 1024-49151 TCP Games Meant to face the internet

What port 25565 is used for

Default port of Minecraft Java Edition servers (Bedrock uses UDP 19132).

Meant to face the internet. Enable online-mode and a whitelist for private servers; scanners index open servers. Keep RCON (25575) private.

Port 25565 is in the registered range and has no IANA assignment. The usage above is unofficial but widespread.

Linux: is anything listening on TCP 25565?

sudo ss -tlnp 'sport = :25565'

Linux / macOS: which process owns the port

sudo lsof -nP -i :25565

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':25565 '

Windows (Command Prompt)

netstat -ano | findstr :25565

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 25565 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 25565

From Windows

Test-NetConnection HOST -Port 25565

ufw

sudo ufw allow 25565/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 25565 -j ACCEPT

nftables

sudo nft add rule inet filter input tcp dport 25565 accept

Windows Firewall

New-NetFirewallRule -DisplayName 'Allow TCP 25565' -Direction Inbound -Protocol TCP -LocalPort 25565 -Action Allow

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