Cisco Cisco Email Security Appliance C390 릴리즈 노트
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Release Notes for Cisco AsyncOS 9.5 for Cisco Email Security Appliances
Installation and Upgrade Notes
After Upgrading
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Performance Advisory
RSA Email DLP
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Enabling RSA Email DLP for outbound messages on an appliance that is already having anti-spam
and anti-virus scanning running on inbound messages can cause a performance degradation of less
than 10%.
and anti-virus scanning running on inbound messages can cause a performance degradation of less
than 10%.
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Enabling RSA Email DLP on an appliance that is only running outbound messages and is not
running anti-spam and anti-virus can cause higher performance degradation as compared to the
previous scenario.
running anti-spam and anti-virus can cause higher performance degradation as compared to the
previous scenario.
SBNP
SenderBase Network Participation now uses the Context Adaptive Scanning Engine (CASE) to collect
data to power IronPort Information Services. In some configurations customers may experience a
moderate performance decline.
data to power IronPort Information Services. In some configurations customers may experience a
moderate performance decline.
Outbreak Filters
Outbreak Filters uses the Context Adaptive Scanning Engine to determine the threat level of a message
and scores messages based on a combination of Adaptive Rules and Outbreak Rules. In some
configurations, you may experience a moderate performance decline.
and scores messages based on a combination of Adaptive Rules and Outbreak Rules. In some
configurations, you may experience a moderate performance decline.
IronPort Spam Quarantine
Enabling the IronPort Spam Quarantine on-box for a C-Series or X-Series appliance causes a minimal
reduction in system throughput for nominally loaded appliances. For appliances that are running near or
at peak throughput, the additional load from an active quarantine may cause a throughput reduction of
10-20%. If your system is at or near capacity, and you desire to use the IronPort Spam Quarantine,
consider migrating to a larger C-Series appliance or an M-Series appliance.
reduction in system throughput for nominally loaded appliances. For appliances that are running near or
at peak throughput, the additional load from an active quarantine may cause a throughput reduction of
10-20%. If your system is at or near capacity, and you desire to use the IronPort Spam Quarantine,
consider migrating to a larger C-Series appliance or an M-Series appliance.
If you change your anti-spam policy from dropping spam to quarantining it (either on-box or off-box),
then your system load will increase due to the need to scan additional spam messages for virus and
content security. For assistance in properly sizing your installation please contact your authorized
support provider.
then your system load will increase due to the need to scan additional spam messages for virus and
content security. For assistance in properly sizing your installation please contact your authorized
support provider.
File Analysis Server Change
The File Analysis cloud server URL has changed. In order to ensure smooth transition of service,
perform the following tasks:
perform the following tasks:
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You may need to adjust your firewall settings to allow this traffic to pass. To see the new URL, select
Security Services > File Reputation and Analysis, then select Advanced Settings for File
Analysis.
Security Services > File Reputation and Analysis, then select Advanced Settings for File
Analysis.
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The file types that can be analyzed may have changed after upgrade. You should receive an alert if
there are changes. To verify the file types selected for analysis, select Security Services > File
Reputation and Analysis.
there are changes. To verify the file types selected for analysis, select Security Services > File
Reputation and Analysis.