Flow

Control packet routing, filtering and forwarding with flow rules and zones.

Flow rules describe which packets are allowed, rejected, dropped, forwarded, or modified. Rules can match packet origin, interfaces, zones, IP protocol, addresses, ports, and packet metadata.

• Rules - Ordered packet handling rules for routed and locally generated traffic.
• Zones - Group network interfaces into zones to simplify flow rules and service ACLs.
• Port forwarding - Forward TCP or UDP packets destined for an address on this device to another host address using destination NAT (DNAT).