How does a firewall work?

Related questions

1. What do you mean by firewall?
2. What is open source firewall?
3. What is a firewall drop?
4. What is hardware firewall?
5. What is AES NI CPU Crypto?
6. What is Netgate?
7. What is Intel AES NI BIOS?
8. Does AMD support AES NI?
9. What is pfSense used for?
10. What does Suricata do?

Tags

1. #coming
2. #firewall
3. #through
4. #information
5. #simply
6. #filters
7. #packet
8. #connection
9. #landscape
10. #incoming
11. #place
12. #internet
13. #flagged
14. #device
15. #private
16. #network
17. #allowed
18. #computer
19. #hardware
20. #different
21. #program
22. #system