I’ve published the first release of my Windows Home Server addin, which allows for two factor authentication for the WHS remote access website via the Yubikey hardware token. The plan is, in the future, to also support some software based tokens. Maybe I’ll even whip up an implementation of OATH HOTP for a few devices if I can’t find suitable open source solutions.
Let me know what you think of the addin, and please submit any bugs or feature suggestions. I’m interested in the community auditing the code for security flaws, as I’d like this to be as sound as possible.