error-pam-authentication-error-for-root-when-trying-to-ssh-to-freebsd-server-as-root

By default ssh is disabled in Freebsd and work around is shared my one of my posts, http://www.zyraxtech.com/2014/06/permission-denied-keyboard-interactive-authentication/ :

However We faced an issue with one of our old server who’s ssh was configured, by one of the lines were changed mistakenly which caused following error:

error: PAM: authentication error for root from 192.168.XXX.XXX

following lines were checked and changed:

PermitRootLogin yes 
PasswordAuthentication yes 
AllowUsers vht

to

AllowUsers root

NOTE: allowuser line was mistakenly changed.

Hope this helps !