A systems administrator is configuring a firewall on a newly deployed web server using Uncomplicated Firewall (UFW). The web service has been configured to listen only on port 8080 for TCP connections. Which of the following commands is the most precise and secure way to allow access to this web service?
The correct command is sudo ufw allow 8080/tcp. This command specifically opens port 8080 for the TCP protocol, which is the most precise and secure method for this scenario.
sudo ufw allow http would open port 80, which is the standard port for HTTP, not the custom port 8080 where the service is running.
sudo ufw allow 8080 would open port 8080 for both TCP and UDP traffic. Since the service only uses TCP, allowing UDP is unnecessary and less secure.
sudo ufw add 8080/tcp is incorrect because add is not a valid UFW command for creating an allow rule; the correct keyword is allow.
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