How do firewall rules work?

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Tags

1. #subsequent
2. #having
3. #matched
4. #examine
5. #applied
6. #contain
7. #rules
8. #firewalls
9. #according
10. #packets
11. #matches
12. #which
13. #their
14. #characteristics
15. #memset
16. #series
17. #incoming
18. #packet
19. #action
20. #perform
21. #ignored