ZyXEL Communications NBG7510, Руководство пользователя, Страница: 17 / 149

Chapter 1 Introducing the Zyxel Device
NBG7510 User’s Guide
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Consequently, you can enable and create IPv6 firewall rules to filter IPv6 traffic.
Firewall protects your Zyxel Device and network from attacks by hackers on the Internet and control
access to it. The firewall:
•allows traffic that originates from your LAN computers to go to all other networks.
•blocks traffic that originates on other networks from going to the LAN.
The following figure illustrates the firewall action. User A can initiate an IM (Instant Messaging) session
from the LAN to the WAN (1). Return traffic for this session is also allowed (2). However other traffic
initiated from the WAN is blocked (3 and 4).
Figure 5
Firewall Default Action
1.3 Operating Modes for the Zyxel Device
The Zyxel Device is available in both Standard (router) mode and AP mode.
1.3.1 Standard (Router) Mode
The Zyxel Device is set to standard (router) mode by default. The Zyxel Device is used to connect the
local network to another network (for example, the Internet). In standard mode Zyxel Device has two IP
addresses, a LAN IP address and a WAN IP address. It also has more routing features. In the example
scenario below, Zyxel Device connects the local network to the Internet through a modem (
M
).