Windows 11 Open Ports -

| Risk | Example | |-------|---------| | Remote exploitation | SMB (445) – EternalBlue | | Information disclosure | RPC (135) – OS version, domain info | | Lateral movement | Open RPC / SMB inside a network | | Malware binding | Reverse shells listen on high ports | | Unpatched services | Print Spooler (historically 445, 139) |

Public networks (Wi-Fi, hotel, airport) increase exposure. windows 11 open ports

Create an inbound rule blocking all ports except explicit allows — "whitelist" approach. | Risk | Example | |-------|---------| | Remote

Windows has a kernel-mode HTTP listener (HTTP.sys) that allows multiple applications to share ports like 80 and 443 via URL reservations.
View HTTP.sys listeners: Public networks (Wi-Fi, hotel, airport) increase exposure

netsh http show servicestate

Applications using HTTP.sys include IIS, Print Spooler web APIs, and some .NET services.