NIS 2009 (16.5.0.135) slows upload speed with intrusion prevention enabled.

I am using a 100Mbs connection (up/down) and when intrusion prevention is enabled my upload speed slows from 94Mbs to 40Mbs. I have tested this numerous times with the same results. The web site I used for the test needs a user name and password so it's not available to all users.

 

Intrusion prevention disabled.

 

Intrusion Detection enabled

 

 

Is there a work around to prevent this? Thanks.