drodecker's questions

From Windows CMD, when trying to ping another computer on our internal LAN, the IP obviously fails to respond. However the reply of "Destination host unreachable." comes from yet a different IP, and not that of the router.

In my network, the gateway is 10.0.0.252, but I'm getting a reply from 10.0.20.188; which is an dynamic DHCP allocated IP to general devices.

C:\Users\drodecker>ping pbx

Pinging pbx.office.relevantads.com [10.1.1.211] with 32 bytes of data:
Reply from 10.0.20.188: Destination host unreachable.
Reply from 10.0.20.188: Destination host unreachable.
Reply from 10.0.20.188: Destination host unreachable.
Reply from 10.0.20.188: Destination host unreachable.

Ping statistics for 10.1.1.211:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Our websites are being crawled by content thieves on a regular basis. We obviously want to let through the nice bots and legitimate user activity, but block questionable activity.

We have tried IP blocking at our firewall, but this becomes to manage the block lists. Also, we have used IIS-handlers, however that complicates our web applications.

Is anyone familiar with network appliances, firewalls or application services (say for IIS) that can reduce or eliminate the content scrapers?