ZyXEL ZyWALL 5 User Guide - Page 272
To VPN Packet Direction
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Chapter 13 Firewall Screens By default, the ZyWALL drops packets traveling in the following directions. • WAN 1 to LAN These rules specify which computers connected to WAN 1 can access which computers or services on the LAN. For example, you may create rules to: • Allow certain types of traffic, such as Lotus Notes database synchronization, from specific hosts on the Internet to specific hosts on the LAN. • Allow public access to a Web server on your protected network. You could also block certain IP addresses from accessing it. Note: You also need to configure NAT port forwarding (or full featured NAT address mapping rules) to allow computers on the WAN to access devices on the LAN. See Section 22.4.3 on page 442 for an example. • WAN to WAN By default the ZyWALL stops computers connected to WAN1 or WAN2 from managing the ZyWALL or using the ZyWALL as a gateway to communicate with other computers on the WAN. You could configure one of these rules to allow a WAN computer to manage the ZyWALL. Note: You also need to configure the remote management settings to allow a WAN computer to manage the ZyWALL. See Chapter 5 on page 109 for information about packets traveling to or from the VPN tunnels. To VPN Packet Direction The ZyWALL can apply firewall rules to traffic before encrypting it to send through a VPN tunnel. To VPN means traffic that comes in through the selected "from" interface and goes out through any of the ZyWALL's VPN tunnels. For example, From LAN To VPN specifies the traffic that is coming from the LAN and going out through any of the ZyWALL's VPN tunnels. For example, by default the From LAN To VPN default firewall rule allows traffic from the LAN computers to go out through any of the ZyWALL's VPN tunnels. You could configure the From DMZ To VPN default rule to set the ZyWALL to silently block traffic from the DMZ computers from going out through any of the ZyWALL's VPN tunnels. 272 ZyWALL 5/35/70 Series User's Guide
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