NETGEAR STM150EW-100NAS, UTM5EW-100NAS manual Configure Distributed Spam Analysis, 207

ProSecure Unified Threat Management (UTM) Appliance

To delete a blacklist provider from the real-time blacklist:

1.In the real-time blacklist, click the Delete table button next to the blacklist provider that you want to delete.

2.Click Apply to save your settings.

Configure Distributed Spam Analysis

Spam, phishing, and other email-borne threats consist of millions of messages intentionally composed differently to evade commonly used filters. Nonetheless, all messages within the same outbreak share at least one unique, identifiable value that can be used to distinguish the outbreak.

With distributed spam analysis, message patterns are extracted from the message envelope, headers, and body with no reference to the content itself. Pattern analysis can then be applied to identify outbreaks in any language, message format, or encoding type. Message patterns can be divided into distribution patterns and structure patterns. Distribution patterns determine if the message is legitimate or a potential threat through analysis of the way it is distributed to the recipients, while structure patterns determine the volume of the distribution.

The UTM uses a distributed spam analysis architecture to determine whether an email is spam for SMTP and POP3 emails. Any email that is identified as spam is tagged as spam (an option for both SMTP and POP3) or blocked (an option possible only for SMTP).

Note: Unlike other scans, you do not need to configure the spam score because the NETGEAR Spam Classification Center scores the spam automatically as long as the UTM is connected to the Internet. However, this does mean that the UTM needs to be connected to the Internet for the spam analysis to be performed correctly.

Note: The UTM transfers normal email (also referred to as HAM) to the users and marks this email as Pass in the traffic logs.

To configure distributed spam analysis and the antispam engine settings:

1.Select Application Security > Email > Distributed Spam Analysis. The Distributed Spam Analysis screen displays:

Content Filtering and Optimizing Scans

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