What is IP table and firewall in Linux?

Related questions

1. Is a firewall necessary?
2. What is firewall in Linux?
3. Does Linux need a firewall?
4. Does CentOS have a firewall?
5. Does Linux have a built in firewall?
6. How do I open firewall on Linux?
7. Is Linux really safer than Windows?
8. Is Linux secure for banking?
9. Is iptables a stateful firewall?
10. Is Linux firewall on?

Tags

1. #utility
2. #firewall
3. #chains
4. #iptables
5. #administrator
6. #netfilter
7. #configure
8. #implemented
9. #provided
10. #stores
11. #rules
12. #allows
13. #modules
14. #linux
15. #different
16. #program
17. #tables
18. #kernel
19. #space
20. #system