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Windows 11 Open Ports _verified_ Here

: For outgoing connections, Windows 11 uses a default dynamic range of 49152 to 65535 Firewall Profiles : Rules can be applied to three specific network profiles: (workplace), (trusted home networks), and (untrusted spots like coffee shops). Microsoft Support Commonly Used & Pre-configured Ports Description HTTP / HTTPS Standard web traffic; 443 is encrypted. SMB (File Sharing) Used for file and printer sharing. Used for client-server communication. Resolves domain names to IP addresses. Remote Desktop Protocol for remote access. Managing Ports in Windows 11

Windows 11 enables IPv6 by default. Many services bind to [::] (IPv6 wildcard), which on Windows via IPv4-mapped addresses ( ::ffff:192.168.1.1 ). Thus, seeing only [::]:445 does not mean IPv4 is blocked — it’s dual-stack.

Curious what your Windows 11 machine looks like to the internet? Don't rely on internal tools; scan from the outside.