When running a Nmap UDP scan, what would the following output indicate?

The correct answer is A. The port may be open on the system or blocked by a firewall. When Nmap shows an "open filtered" response for the scan results, this indicates a couple of different reasons. The port could be open but a firewall could be blocking the use ACK flags; only

Perimeter Security and Intrusion Detection

Question

Options

AThe port may be open on the system or blocked by a firewall
BThe router in front of the host accepted the request and sent a reply
CAn ICMP unreachable message was received indicating an open port
DAn ACK was received in response to the initial probe packet

How the community answered

(34 responses)

A
74% (25)
B
3% (1)
C
9% (3)
D
15% (5)

Explanation

When Nmap shows an "open filtered" response for the scan results, this indicates a couple of different reasons. The port could be open but a firewall could be blocking the use ACK flags; only

Topics

#Nmap#UDP scanning#open|filtered state#firewall detection

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