Cyber Security Interview Questions and Answers › Cyber Security
What does a firewall do?
A firewall allows or blocks network traffic using rules on IP addresses and ports. Real example: an AWS security group that allows HTTPS from anyone and SSH only from the office IP.

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A firewall allows or blocks network traffic using rules on IP addresses and ports
Example
an AWS security group that allows HTTPS from anyone and SSH only from the office IP
Learn more in the lesson: 32.3 Host Firewall: firewalld and ufw