I have UTM VERSION 9.314-13 on my ESXI
ssd HARDIDSK
CPU intel core i5-4690k cpu 3.50GHZ 4 cpu
in Vmware i have 4 virtualsockets and 5120MB memory .
every think is work but when i active Attack Patterns on IPS my internet speed change from 950Mbit/s to 300Mbit/s ,
i have tried active just ( Operating system specific attacks ) and get same issue .
in my Sophos FW i have
FW is active with 7 rules.
webfiltering is active with 0 requestes.
remote access .
Web Aplication Firewall is active .
Antivirus .
Antispyware .

Any help please ?
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