Why is this happening?

Posted by: Pdfprep Category: CEH-001 Tags: , ,

All the web servers in the DMZ respond to ACK scan on port 80.

Why is this happening?
A . They are all Windows based webserver
B . They are all Unix based webserver
C . The company is not using IDS
D . The company is not using a stateful firewall

Answer: D

Explanation:

If they used a stateful inspection firewall this firewall would know if there has been a SYN-ACK before the ACK.

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