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Not just IP/pings, but if your computer is "discoverable", it means it will allow requests for other things such as public/shared files, remote control/access, any printer resources that may be shared, and DLNA/streaming, homegroup, etc. - any one of those may have a vulnerability that can now be exploited


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I'm not sure with pfsense, but this is possible with psad: psad makes use of Netfilter log messages to detect, alert, and (optionally) block port scans and other suspect traffic. For tcp scans psad analyzes tcp flags to determine the scan type (syn, fin, xmas, etc.) and corresponding command line options that could be supplied to nmap to generate such a ...


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Two answers to this question: You can't Port Knocking Services exist to be connected to. If you have a service, then you need to allow clients to connect to it, and once you do that, it is open to be 'enumerated'. You can't block someone from trying a service to see if it responds because you need that ability for clients to connect to you. ... Unless ...



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