Cisco Cisco Email Security Appliance C650 用户指南
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Cisco IronPort AsyncOS 7.6 for Email Daily Management Guide
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Chapter 2 Using Email Security Monitor
Email Security Monitor Pages
The Quarantined Messages section summarizes Outbreak Filters quarantining, and is a useful gauge of
how many potential threat messages Outbreak Filters are catching. Quarantined messages are counted at
time of release. Typically, messages will be quarantined before anti-virus and anti-spam rules are
available. When released, they will be scanned by the anti-virus and anti-spam software and determined
to be positive or clean. Because of the dynamic nature of Outbreak tracking, the rule under which a
message is quarantined (and even the associated outbreak) may change while the message is in the
quarantine. Counting the messages at the time of release (rather than the time of entry into the
quarantine) avoids the confusion of having counts that increase and decrease.
how many potential threat messages Outbreak Filters are catching. Quarantined messages are counted at
time of release. Typically, messages will be quarantined before anti-virus and anti-spam rules are
available. When released, they will be scanned by the anti-virus and anti-spam software and determined
to be positive or clean. Because of the dynamic nature of Outbreak tracking, the rule under which a
message is quarantined (and even the associated outbreak) may change while the message is in the
quarantine. Counting the messages at the time of release (rather than the time of entry into the
quarantine) avoids the confusion of having counts that increase and decrease.
The Threat Details listing displays information about specific outbreaks, including the threat category
(virus, scam, or phishing), threat name, a description of the threat, and the number of messages
identified. For virus outbreaks, the Past Year Virus Outbreaks include the Outbreak name and ID, time
and date a virus outbreak was first seen globally, the protection time provided by Outbreak filters, and
the number of quarantined messages. You can select either global or local outbreaks as well as the
number of messages to display via the menu on the left. You can sort the listing by clicking on the
column headers.
(virus, scam, or phishing), threat name, a description of the threat, and the number of messages
identified. For virus outbreaks, the Past Year Virus Outbreaks include the Outbreak name and ID, time
and date a virus outbreak was first seen globally, the protection time provided by Outbreak filters, and
the number of quarantined messages. You can select either global or local outbreaks as well as the
number of messages to display via the menu on the left. You can sort the listing by clicking on the
column headers.
The First Seen Globally time is determined by the Cisco IronPort Threat Operations Center, based on
data from SenderBase, the world’s largest email and web traffic monitoring network. The Protection
Time is based on the difference between when each threat was detected by the Cisco IronPort Threat
Operations Center and the release of an anti-virus signature by a major vendor.
data from SenderBase, the world’s largest email and web traffic monitoring network. The Protection
Time is based on the difference between when each threat was detected by the Cisco IronPort Threat
Operations Center and the release of an anti-virus signature by a major vendor.
A value of “--” indicates either a protection time does not exist, or the signature times were not available
from the anti-virus vendors (some vendors may not report signature times). This does not indicate a
protection time of zero. Rather, it means that the information required to calculate the protection time is
not available.
from the anti-virus vendors (some vendors may not report signature times). This does not indicate a
protection time of zero. Rather, it means that the information required to calculate the protection time is
not available.
Using the Outbreak Filters page, you can answer questions like:
•
How many messages are being quarantined and what type of threats were they?
•
How much lead time has the Outbreak Filter feature been providing for virus outbreaks?
•
How do my local virus outbreaks compare to the global outbreaks?