I\'m trying to configure SSH for Phabricator to get git running. I\'ve followed this manual but when I call echo {} | ssh git@phabricator.mydomain.com conduit conduit.ping
Your ssh hook is working properly - first, you should ensure that the git ssh user is able to ssh to the normal ssh daemon - this will ensure that you can login with this user.
More than likely you have a bad home directory or bad shell as stated in the comments.
If all of that is working fine, make sure you have a ssh key uploaded to your profile and that you are using this key to connect with.