> For the complete documentation index, see [llms.txt](https://yeasy.gitbook.io/openstack_code_neutron/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://yeasy.gitbook.io/openstack_code_neutron/neutron/agent/firewallpy.md).

# firewall.py

提供 FirewallDriver 元类和继承自它的简单的防火墙驱动类 NoopFirewallDriver。