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 Smoothwall to the exceptions list.