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has someone a solution for a simple and affordable two factor authentication for RDP similar to the SSH login on a unix machine?

PAT

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2 Answers 2

up vote 3 down vote accepted

PhoneFactor might do the trick:

http://www.phonefactor.com/solutions/terminal-services-authentication

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Free too for < 25 users I believe. –  gravyface Oct 14 '11 at 16:05
    
It is. I've used it to provide two factor authentication for web services. –  joeqwerty Oct 14 '11 at 16:07

If you use Radius for authentication, all the major two-factor authentication systems are options for you. You probably need to run the RDP through ISA.

Here's a tutorial I wrote some time ago: http://www.wikidsystems.com/support/wikid-support-center/how-to/how-to-configure-the-microsoft-isa-server-to-support-two-factor-authentication-from-wikid. Note that IAS has been replaced by NPS in 2008+.

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we don't use radius, because we are looking for a "simple and affordable" solution ;) –  perler Jan 20 '12 at 20:19
    
hmm, I find radius to be pretty simple. And free since the MS radius plugin is free and on linux, freeradius. –  nowen Apr 18 '12 at 16:20

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