To locate the firewall, SYN packet is crafted using Hping or any other packet crafter and sent
to the firewall. If ICMP unreachable type 13 message (which is an admin prohibited packet)
with a source IP address of the access control device is received, then it means which of the
following type of firewall is in place?
A.
Circuit level gateway
B.
Stateful multilayer inspection firewall
C.
Packet filter
D.
Application level gateway