Draytek Vigor2000, Руководство пользователя

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5-11
Advanced Setup
In concept, when an outgoing packet is routed to the WAN, the IP
Filter will decide if the packet should be forwarded to the Call Filter or
Data Filter. If the WAN connection has not been established, the
packet will enter the Call Filter. If the packet is not allowed to trigger
router dialing, it will be dropped. Otherwise, it will initiate a call to
establish the WAN connection.
If the WAN connection of the router has been established, the packet
will pass through the Data Filter. Packets match the block rule will be
dropped and the contrary will be sent to the WAN interface.
Alternatively, if an incoming packet enters from the WAN interface, it
will pass through the Data Filter directly. If the packets match the
block rule, it will be dropped. Otherwise, it will be sent to the internal
LAN. The filter architecture is shown as below.
The Following sections will explain more about IP Filter/Firewall Setup
using Web Configurator. The Filter has 12 filter sets with 7 filter rules
for each set. There are a total of 84 filter rules for the
IP Filter/
Firewall Setup . By default, the Call Filter rules are defined in filter