This post is a follow-on to this one, in case you need some history.
I’ll try to keep this short and sweet. So… I had my university ITS program the second slot on my Yubikey Plus (you might not be familiar with that model, but it dates from roughly 2014 and supports OTP and U2F). The Duo-based university central auth system supports Yubikey OTP. After my token was programmed and registered, I tried it out. The first login, it worked like a charm. The second time, I get a message:
This passcode has already been used. Please generate a new passcode and try again.
Tried different browser and different university web site to login to, and keep getting this error.
University ITS says they can’t help me now - don’t know what’s wrong and can’t be bothered to find out, because they are basically doing me a favor by letting me bring my own token, whereas normal policy is to only sell tokens that they buy from Yubico and program fresh for users who need them.
Forum, you are my last hope Unless you can tell me how to tell them how to fix this problem, I’m probably stuck continuing to use the phone app for 2FA, which is a hassle for anyone accustomed to hardware tokens. I realize that it might ultimately be related to the fact that my Plus is so old that something has changed, and it just won’t work no matter what. But not gonna buy a new token from them, because they have a bunch of Y4s that they probably won’t run out of for quite a while. At least if they were selling the new Y5s for the same price, I would consider it Thanks for reading.