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Performance issue after enabling IPS.

RPR84
Just we install Sophos Astaro UTM in our network environment. Now we have an issue when we enabling IPS. When we enable Intrusion Prevention, max download speed is 50Mbps. When we disable IPS, we can download with speed of 110Mbps.

We install Astaro Security Gateway as a virtual appliance in Hyper-V. The VM have 1GB internal memory and 1 CPU. 

Is there someone that knows how I can solve this issue? Thanks!


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    i don't think he's maxing out his cpu..if he's running v9 he may be hitting the cpu performance issue under hyper-v i`ve hit.  You have to throw enough mhz at the vm..however if he's not "pushing " things hard enough the host cpu stays in low gear thereby tanking ips performance.  Multiple downloads work well..but it's http proxy that "pushes" the cpu most times not ips.
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    i don't think he's maxing out his cpu..if he's running v9 he may be hitting the cpu performance issue under hyper-v i`ve hit.  You have to throw enough mhz at the vm..however if he's not "pushing " things hard enough the host cpu stays in low gear thereby tanking ips performance.  Multiple downloads work well..but it's http proxy that "pushes" the cpu most times not ips.
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