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Cisco Bug: CSCuo66758 - Akamei servers are sending RSTs during normal dowloads

Last Modified

Mar 06, 2018

Products (1)

  • Cisco Email Security Appliance

Known Affected Releases

7.6.1-022

Description (partial)

Symptom:
ESA updates are failing, most often during business hours.  Most customers don't see a problem, but the ones that do, can see most of their updates failing.

Conditions:
The Akamei servers that we use for updates.ironport.com are not waiting for us to ack the entire download, and are doing hard closes.  This results in occasional RSTs to our ACK replies, and depending on the timing the RST can cause the download to fail.
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