ZyXEL Communications vantage cnm ユーザーズマニュアル

Chapter 6 Device Security Settings

Vantage CNM User’s Guide

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. 
For example, From LAN To LAN means packets traveling from a computer 

on one LAN subnet to a computer on another LAN subnet on the LAN 

interface of the device or the device itself. The device does not check 

packets traveling from a LAN computer to another LAN computer on the 

same subnet.
From VPN means traffic that came into the device 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 

device’s LAN interface. The device 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 device 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 or terminates at the device. This is 

the case when the device is the hub in a hub-and-spoke VPN. This is also 

the case if you allow someone to use a service (like Telnet or HTTP) through 

a VPN tunnel to manage the device. The device checks the traffic after 

decrypting it (before encrypting it again). 

Note: The VPN connection directions apply to the traffic going 

to or from the device’s VPN tunnels. They do not apply 
to other VPN traffic for which the device is not one of the 
gateways (VPN pass-through traffic). 

Action for Spam Mails

Use this section to set how the device is to handle spam mail.

X-Header

An X-Header is a line (preceded by "X-") in the SMTP mail header.  
Enter an X-tag to insert into the X-header of mails that match a black list or 

are identified as spam by the anti-spam external database. You can enter up 

to 30 ASCII characters before the colon (:) and up to 47 ASCII characters 

after the colon (:).
You can put any information as an X-tag or use "%status" and/or "%score".
For example, if you enter "Mail status: %status %score", you may see "Mail 

status: SPAM 25" in the mail header. That means the mail is classified as 

spam and the spam score is 25.

Phishing Tag

Enter a message or label (up to 16 ASCII characters) to add to the mail 

subject of e-mails that the anti-spam external database classifies as 

phishing.

Note: You must register for and enable the anti-spam external 

database feature in order for the device to use this tag 
(see the chapter on registration for details).

Spam Tag

Enter a message or label (up to 16 ASCII characters) to add to the mail 

subject of e-mails that the device classifies as spam.

Forward SMTP & POP3 

mail with tag in mail 

subject

Select this radio button to have the device forward spam e-mail with the tag 

that you define.
Even if you plan to use the discard option, you may want to use this initially 

as a test to check how accurate your anti-spam settings are. Check the e-

mail the device forwards to you to make sure that unwanted e-mail is marked 

as spam and legitimate e-mail is not marked as spam.

Table 57   Device Operation > Device Configuration > Security > Anti-Spam > General