Adding SSH 2fa using Google Authenticator breaks the ability to SSH -X into Joinmarket-Qt

[davterra]

I recently added Google Authenticator as an SSH 2fa means. It works great for SSH-ing in as "admin" but since doing so, I am not able to launch the Joinmarket-Qt GUI using the advised "ssh -X ....." command given in the Joininbox menu.

Steps to replicate:

1. install libpam-google-authenticator
2. do: google-authenticator
3. answer the resulting questions (the given defaults are fine)
4. Add this line to the bottom of your /etc/pam.d/sshd file:
   auth required pam_google_authenticator.so
5. Go to your /etc/ssh/sshd_config file and find the line that says: ChallengeresponseAuthentication no
   and change the no to yes.
6. Restart sshd.
7. Test basic ssh and then try to launch Joinmarket-Qt.