Port 25575 (Minecraft RCON)

Remote console for Minecraft Java servers (enable-rcon).

Registered (user) port, 1024-49151 TCP Games Do not expose to the internet

What port 25575 is used for

Remote console for Minecraft Java servers (enable-rcon).

Do not expose to the internet. RCON passwords are sent in clear text and allow server commands; keep it on localhost.

Port 25575 is in the registered range and has no IANA assignment. The usage above is unofficial but widespread.

Linux: is anything listening on TCP 25575?

sudo ss -tlnp 'sport = :25575'

Linux / macOS: which process owns the port

sudo lsof -nP -i :25575

Older Linux / BSD (net-tools)

sudo netstat -tlnp | grep ':25575 '

Windows (Command Prompt)

netstat -ano | findstr :25575

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 25575 -State Listen | Select LocalAddress,OwningProcess

From another machine

nc -vz -w 5 HOST 25575

From Windows

Test-NetConnection HOST -Port 25575

ufw

sudo ufw deny 25575/tcp

iptables

sudo iptables -A INPUT -p tcp --dport 25575 -j DROP

nftables

sudo nft add rule inet filter input tcp dport 25575 drop

Windows Firewall

New-NetFirewallRule -DisplayName 'Block TCP 25575' -Direction Inbound -Protocol TCP -LocalPort 25575 -Action Block

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