Why is there an intermittent traffic loss from a Smoothwall when behind a Cisco ASA?

Article #: Product Castle
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How to stop the Cisco ASA software threat detection limiting the connection rate of the Smoothwall


A Smoothwall behind a Cisco ASA appliance is suffering intermittent traffic loss.

An issue similar to "flood mitigation" on the ISA appliance, this issue can occur on a Smoothwall that's configured behind a Cisco ASA appliance, causing periods of traffic loss, including not being able to ping the ASA for a short amount of time.


There's a threat-detection configuration that can be applied to the ASA that includes connection rate limiting options:


It is recommended adding your Smoothwallto the exceptions list.


Last updated: Author: Contributions by:
29 July 2016   DMT