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- Search Engines
-- Search Engine Spider and User Agent Identification
---- Server Farms - Sept. 2013
keyplyr - 10:06 am on Dec 13, 2013 (gmt 0)Thread source:: http://www.webmasterworld.com/search_engine_spiders/4607411.htm
Don't know what's "backdoor" about it. All the major SEs have server ranges abroad.
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