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CompTIA Exam CAS-004 Topic 1 Question 53 Discussion
Topic #: 1
A security engineer is assessing a legacy server and needs to determine if FTP is running and on which port The service cannot be turned off, as it would impact a critical application's ability to function. Which of the following commands would provide the information necessary to create a firewall rule to prevent that service from being exploited?
The netstat -tulpn command is used to display network connections, routing tables, interface statistics, masquerade connections, and multicast memberships. The -tulpn options specifically show TCP and UDP connections with the process ID and the name that is listening on each port, which would provide the necessary information to identify if FTP is running and on which port without turning the service off. This information can then be used to create a precise firewall rule to prevent the FTP service from being exploited.
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