CYB 310 Module Five Lab Worksheet
June 5th, 2022 CYB 310: Network Defense Module Five Lab Worksheet
Lab: Closing Ports and Unnecessary Services
Prompt
Response
In the lab sec on, "Connec ng to the Open Ports and Services Using Telnet and FTP," Step 13, complete the steps, type your name a er the command prompt, and take a screenshot of the
192.168.12.11 80 nnected to 192.168.12.11. LS HTTP/1.
output.
Not Found ength:
Microsoft-IIS/7.5 2022 00:08:33 GMT
osed by foreign_host
Lab: Closing Ports and Unnecessary Services
Prompt
Response
In the lab sec on, "Closing Unnecessary Ports and Services, Step 25, type your name a er the command prompt and take a screenshot of the output of the scan of port 80 (www) on the Windows machine a er closing FTP services.
is up_0.00024s latency. SERVICE http 0050:56:8E42:54VMware)
done: 1 IP address (1 host up) scanned in 13.61 seconds kali2:-# nmap 192.168.12.11 -p 80
ting Nmap 6.49BETA4 https://nmap.org o.00028s latency. R STATE SERVICE
2022-06-03 20:19 EDT
005056:8E4254VMware
Closing unwanted ports and communica on mediums is essen al to network hardening. Why is this essen al and how does it help with network defense?
Leaving ports open can leave you vulnerable to malware a acks and hackers. Hackers will scan for open ports and can exploit them. It is essen al to close unwanted ports to avoid a acks. Closing unwanted ports helps with network defense because it is another way to reduce a acks.
Using an adversarial mindset, how can you test to make sure only needed ports are open? What tools would you use?
Using windows as an example, if you want to check a port you can use command prompt and telnet or netstat. However, there are third party tools that are more re ned such as Zenmap or Solarwinds. Zenmap will scan ports and then complete follow-
you can create new rules on your rewall to close them.
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