Cisco Cisco Email Security Appliance C170
8
Release Notes for Cisco IronPort AsyncOS 7.6.3 for Email
7.6.3
Resolved Issues
Step 4
Wait for the queue to empty.
Step 5
From the System Administration tab, select the System Upgrade page.
Step 6
Click the Available Upgrades button. The page refreshes with a list of available AsyncOS upgrade
versions.
versions.
Step 7
Click the Begin Upgrade button and your upgrade will begin. Answer the questions as they appear.
Step 8
When the upgrade is complete, click the Reboot Now button to reboot your IronPort appliance.
Resume all listeners.
Resolved Issues
This section describes the resolved issues for the Cisco IronPort AsyncOS 7.6 for Email releases.
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Cisco IronPort AsyncOS 7.6.3 for Email
describes the resolved issues in the Cisco IronPort AsyncOS 7.6.3 for Email release.
Table 1
Resolved Issues in AsyncOS 7.6.3 for Email
Defect ID
Description
‘Use SenderBase for Flow Control’ not Rate Limiting as expected
Rate limiting is applied to each IP address instead of the full subnet. This results in
the ESA accepting more emails than expected for the rate limiting settings. This issue
occurs when ‘Use SenderBase for Flow Control’ is selected as the Flow Control
method on AsyncOS 7.6 or later.
the ESA accepting more emails than expected for the rate limiting settings. This issue
occurs when ‘Use SenderBase for Flow Control’ is selected as the Flow Control
method on AsyncOS 7.6 or later.
SenderBase Reputation Service unable to retrieve data
Reputation engine restarts giving out “SBRS unable to retrieve” errors. This issue
occurs with very high incoming connection rate leaving the mail processing engine in
a state where every connection gets an “SBRS unable to retrieve.”
occurs with very high incoming connection rate leaving the mail processing engine in
a state where every connection gets an “SBRS unable to retrieve.”
Sophos engine get expired after upgrade
Upgrade to latest AsyncOS which is having Expired Sophos engine will alert the user
stating that it is expired. This issue occurs when user upgrades to latest available
AsyncOS which has Expired Sophos Engine. An alert will be sent to user stating that
the Sophos engine is expired.
stating that it is expired. This issue occurs when user upgrades to latest available
AsyncOS which has Expired Sophos Engine. An alert will be sent to user stating that
the Sophos engine is expired.