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Associated article: Closing DOS's Backdoor

Tags: Security     Design     

					_CLOSING DOS'S BACKDOOR_
by John Switzer

[LISTING ONE]

             TITLE - BACKDOOR.SYS - closes DOS's backdoors
             PAGE 60,132
             .RADIX 16

; BACKDOOR.SYS closes two "backdoors" into the MS-DOS INT 21h function
; dispatcher that could be used by a virus or ...
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