ZyXEL ZyWALL 5 User Guide - Page 107
Label, Description, From Wan1 To, From Wan2 To Dmz, Lan To Lan, Wan1 To Wan1, From Vpn, From Vpn
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Figure 42 Anti-Spam Wizard: Direction Configuration Chapter 4 Wizard Setup The following table describes the labels in this screen. Table 23 Anti-Spam Wizard: Direction Configuration LABEL DESCRIPTION Enable Anti-Spam Select this check box to check traffic for spam SMTP (TCP port 25 and POP3 (TCP port 110) e-mail. From, To Select the directions of travel of packets that you want to check. Select or clear a row or column's first check box (with the interface label) to select or clear the interface's whole row or column. You could for example have the ZyWALL check packets traveling in from the WAN to the interface your e-mail server is on. For example, From WAN1 To DMZ, or From WAN2 To DMZ. From LAN To LAN means packets traveling from a computer on one LAN subnet to a computer on another LAN subnet via the LAN interface of the ZyWALL. The ZyWALL does not check packets traveling from a LAN computer to another LAN computer on the same subnet. From WAN1 To WAN1 means packets that come in through the WAN 1 interface and the ZyWALL routes back out through the WAN 1 interface. From VPN means traffic that came into the ZyWALL through a VPN tunnel and is going to the selected "to" interface. For example, From VPN To LAN specifies the VPN traffic that is going to the LAN or terminating at the ZyWALL's LAN interface. The ZyWALL checks the traffic after decrypting it. To VPN is traffic that comes in through the selected "from" interface and goes out through any VPN tunnel. For example, From LAN To VPN specifies the traffic that is coming from the LAN and going out through a VPN tunnel. The ZyWALL checks the traffic before encrypting it. From VPN To VPN means traffic that comes in through a VPN tunnel and goes out through (another) VPN tunnel. This is the case when the ZyWALL is the hub in a hub-and-spoke VPN. The ZyWALL checks the traffic after decrypting it (before encrypting it again). Note: The VPN connection directions apply to the traffic going to or from the ZyWALL's VPN tunnels. They do not apply to other VPN traffic for which the ZyWALL is not one of the gateways (VPN pass-through traffic). ZyWALL 5/35/70 Series User's Guide 107