Chapter 33 Anti-Spam

Figure 422 Anti-X > Anti-Spam > General

The following table describes the labels in this screen.

Table 177 Anti-X > Anti-Spam > General

LABEL

DESCRIPTION

General Settings

Click Advanced to display more settings. Click Basic to display fewer settings.

 

 

Enable Anti-

Select this check box to check SMTP (TCP port 25) and POP3 (TCP port 110)

Spam

traffic for spam e-mail.

 

 

Action taken

An e-mail session is when an e-mail client and e-mail server (or two e-mail servers)

when mail

connect through the ZyWALL. Select how to handle concurrent e-mail sessions that

sessions

exceed the maximum number of concurrent e-mail sessions that the anti-spam

threshold is

feature can handle. See the chapter of product specifications for the threshold.

reached

Select Forward Session to have the ZyWALL allow the excess e-mail sessions

 

without any spam filtering.

 

Select Drop to have the ZyWALL drop mail connections to stop the excess e-mail

 

sessions. The e-mail client or server will have to re-attempt to send or receive e-

 

mail later when the number of e-mail sessions is under the threshold.

 

 

Policy Summary

 

 

 

Priority

This is the position of an anti-spam policy in the list. The ordering of your anti-spam

 

policies is important as the ZyWALL applies them in sequence. Once traffic

 

matches an anti-spam policy, the ZyWALL applies that policy and does not check

 

the traffic against any more policies.

 

 

From

The anti-spam policy has the ZyWALL scan e-mail traffic that is coming from this

 

zone and going to the To zone.

 

 

To

The anti-spam policy has the ZyWALL scan e-mail traffic that is going to this zone

 

from the From zone.

 

 

Protocol

These are the protocols of traffic to scan for spam.

 

SMTP applies to traffic using TCP port 25.

 

POP3 applies to traffic using TCP port 110.

 

 

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ZyWALL USG 100/200 Series User’s Guide