"Unusual traffic from your computer network"

[sib2017]

Hi,

Users are often getting the message from google and they are forced to enter captcha  "Unusual traffic from your computer network",when i check palo alto it seems very normal . 

Is there a way to classify  or monitor the users who really sending  bulk traffic to google .

When i capture the traffic from the moment user hit google.com , the software captured around 500 frames in both directions . 

So the questions from palo alto side  ,how do i check which source is sending unwanted traffic to google . 

and  how to limit if they are sending huge amount of packets .

Please help

Thanks

[Gertjan-HFG]

We had the same. Also found nothing unusual in our PA.

At the end is seems that our SEO guy had a toolbar in his webbrowser to "enhance" some websites pagerank.