http://www.windowsitpro.com/authors/author/author/5777848/rss/5777848en-USSun, 27 May 2012 07:49:29 GMTSun, 27 May 2012 07:49:29 GMThttp://www.windowsitpro.com/article/ip-addressing/home-grown-two-factor-authenticationYou might not need to spend a lot of money on smart cards or password-generating tokens. Write your own authentication solution that checks the user’s IP address against known bad and good addresses.]]>Paul HensarlingThu, 02 Aug 2007 00:00:00 GMThttp://www.windowsitpro.com/article/ip-addressing/home-grown-two-factor-authentication