Summary
Know the IP address range of Web Reputation Service (WRS).
Details
WRS is a shared Trend Micro service that is used by Deep Security for Web Apps.
If the sites scanned by Deep Security for Web Apps do not have a WRS rating, then it will cause a WRS scan. WRS scan has the the following IP range:
150.70.75.0/25 and 150.70.97.0/24
If the website has a WRS safety rating already, the Deep Security for Web Apps scan will NOT cause additional WRS scans.