H 411: Nmap (40 pts)

What You Need for This Project

A computer of any kind you can install software on

Installing Nmap

Go to https://nmap.org/download

Download and install Nmap.

Port-Scanning scanme.nmap.org

Launch Nmap. Enter a Target of

scanme.nmap.org

outlined in light blue in the image below.

At the top right, click the Scan button.

When the scan finishes, click the "Ports / Hosts" tab.

H 411.1: High Port Number (5 pts)
The flag is covered by a green box in the image below.

Port-Scanning ad.samsclass.info

Scan

ad.samsclass.info

as shown below.

H 411.2: Raspbian Port Number (5 pts)
The flag is covered by a green box in the image below.

Important Nmap Options

By default, Nmap only scans the most popular 1000 TCP ports, not all 65,536 possible ports.

Here is a list of all the Nmap options:

https://svn.nmap.org/nmap/docs/nmap.usage.txt

These are the most important ones:

-A : Advanced: detect OS version and service names
-p : Scan specific ports
-sU : Scan UDP ports
-sV : Find version numbers
-p- : Scan all 65536 TCP ports
--min-rate=1000 -T4 : Scan rapidly
-sV --script=banner : Grab banners

To use them, add the options to the Command line.

H 411.3: My packets (10 pts)
Find the TCP port on the ad.samsclass.info server that returns this banner: "My packets are your packets."
That port number is the flag.
Hints: You need to add an option to the scan.
Look on the "Nmap Output" tab.

H 411.4: Key to the Universe (15 pts)
Find the TCP port on the ad.samsclass.info server that returns this banner: "The key to the Universe."
That port number is the flag.
Hint: scan more ports

Moved to local server 3-21-19
Forms removed 7-9-19
Generalized to non-cloud servers and renumbered to H 410 6-8-2020
Minor format fix 8-1-2020