Kendo - 1:08 am on Apr 27, 2013 (gmt 0)
Why would you NOT block a server farm
By "server farm" you are probably refering to a data center that provides hosting for colocated and owned servers that will include a large variety of services:
- sites/services that you have used in the past and probably still use
- DNS servers for hundreds of clients and possibly thousands of domains
- mail services for hundreds of companies (not just ADSL users)
- ecommerce gateways linked to banks
- caching servers
- proxy gateways
- website mirrors
- perhaps one of your social networks
- this forum is sitting on one of them somewhere!
A while back I was managing an ISP, back in the days of modem diallup, and our users were having problems contacting family and friends overseas. The most common cause was that networks in Europe were blocking the IP range that we lived in assuming that the whole range belonged to Taiwan when in fact it was broken up and shared by many different locations like us in Australia.
Also, often I have seen ownership of an IP range listed as belonging to a major provider and the actual usage located on a different continent.