when im using nmap for network discovery , i dont understand theses options
when i use -PS or PA or PU ? and what is the difference between them ?
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According to this answer, Nmap consider all the responses using options
-P* as an indication that the server is up.
The difference between
-P* options are related to the difference of packets types that's been used:
-PSTCP SYN Ping
-PATCP ACK ping
-PYSCTP Init Ping
-PEICMP echo ping
And many other types you can find in this link