SEO Best Practices : How to Block false bots or Hackers IP?

Using IP based filtering will catch out rogue bots masquerading as major bots. Also, you can use reverse DNS lookup and compare the names of bots approaching. 

ATG Commerce has a pipeline servlet that handles the blocking of requests from certain IP addresses.
 
/atg/dynamo/servlet/pipeline/BlockIPServlet 
# set to false to disable
enabled=true
# IP Lists
blockedIPs=152.52.91.12,\
143.13.65.1