What is BSD firewall?

Related questions

1. Is pfSense a stateful firewall?
2. What does a firewall do?
3. Is pfSense a router or firewall?
4. Is Linux based on BSD?
5. Does a firewall protect against hackers?

Tags

1. #netfilter
2. #comparable
3. #licensed
4. #ipfilter
5. #written
6. #firewalling
7. #central
8. #stateful
9. #packet
10. #license
11. #index
12. #openbsd
13. #website
14. #software
15. #piece
16. #filter
17. #iptables