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