Port 5357 Hacktricks [FAST]

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If network discovery is not a business requirement (especially on critical servers), disable the following Windows services: Open services.msc . Locate . Change the Startup type to Disabled and stop the service. Locate Function Discovery Resource Publication . Change the Startup type to Disabled and stop the service. Windows Firewall Configuration

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You can test for this vulnerability by sending a request with a large byte range. If the server responds with "Requested Range Not Satisfiable", it might be patched. If it crashes or returns a 500 error, it may be vulnerable.

Port 5357 operates over the Hypertext Transfer Protocol (HTTP) and serves as the communication endpoint for . Core Components Protocol: TCP Service: HTTP (Microsoft-HTTPAPI/2.0) Function: Web Services on Devices (WSD) / Network Discovery Underlying Engine: http.sys (Windows HTTP protocol stack) This public link is valid for 7 days

According to HackTricks, a website known for providing detailed guides on penetration testing and cybersecurity:

: Note that this port is typically open in unmanaged or small office networks where "Network Discovery" is enabled. In highly secured environments, hardening recommendations Can’t copy the link right now

But the HackTricks page had warned about a darker possibility. Sometimes, this port was tied to the "Network Discovery" feature, which utilized the and NBNS protocols. While this was technically a different vector, they often overlapped in misconfigurations.

To minimize the risks associated with port 5357, follow these best practices: