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Friday, 12 December 2008
The concept of IP spoofing, was initially discussed in academic circles in the 1980's. While known about for sometime, it was primarily theoretical until Robert Morris, whose son wrote the first Internet Worm, discovered a security weakness in the TCP protocol known as sequence prediction. Stephen Bellovin discussed the problem in-depth in Security Problems in the TCP/IP Protocol Suite, a paper that addressed design problems with the TCP/IP protocol suite. Another infamous attack, Kevin Mitnick's Christmas Day crack of Tsutomu Shimomura's machine, employed the IP spoofing and TCP sequence prediction techniques. While the popularity of such cracks has decreased due to the demise of the services they exploited, spoofing can still be used and needs to be addressed by all security administrators.