An attacker is attempting to telnet into a corporation’s system in the DMZ. The attacker doesn’t want to get caught and is spoofing his IP address. After numerous tries he remains unsuccessful in connecting to the system. The attacker rechecks that the target system is actually listening on Port 23 and he verifies it with both nmap and hping2. He is still unable to connect to the target system.

What is the most probable reason?

War dialing is a very old attack and depicted in movies that were made years ago.

Why would a modem security tester consider using such an old technique?

Ann would like to perform a reliable scan against a remote target. She is not concerned about being stealth at this point.

Which of the following type of scans would be the most accurate and reliable option?

You are conducting a port scan on a subnet that has ICMP blocked. You have discovered 23 live systems and after scanning each of them you notice that they all show port 21 in closed state.

What should be the next logical step that should be performed?

Which of the following would be the best reason for sending a single SMTP message to an address that does not exist within the target company?