Does Linux need a firewall?

Related questions

1. Is Ubuntu firewall on by default?
2. Is Linux secure for banking?
3. What is firewall Linux?
4. What is mangle in iptables?
5. Why does Linux not need antivirus?
6. What is iptables command?
7. Why doesn't Linux have viruses?
8. What kind of firewall does iptables implement?
9. How do firewall rules work?
10. Is Linux really safer than Windows?

Tags

1. #microsoft
2. #security
3. #introduce
4. #firewall
5. #desktop
6. #since
7. #ubuntu
8. #ports
9. #linux
10. #properly
11. #contrast
12. #windows
13. #hardened
14. #internet
15. #issues
16. #general
17. #system
18. #default