红帽全球峰会10.6. 访问控制列表
计算通过使用 OpenStack 网络服务支持项目网络流量访问控制。安全组允许管理员和项目指定允许通过虚拟接口端口传递的流量类型和方向（入口/出口）。安全组规则是有状态的 L2-L4 流量过滤器。
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