UDP is User Datagram Protocol. It is a connection less protocol.We cannot be sure that all data sent reaches the destination. No acknowledgment is provided.
Attacker => UDP => Target
case1: open port
No Error message
case2: closed port
Port unreachable error message
pros and cons :
IDP is a connectionless protocol.So no guarantee on data reaching port.
UDP is not very accurate
Admin can actively monitor all UDP data traffic. This will lose the stealth feature of the Scanning process.
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Friday, November 13, 2009
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