Gitlab SSH connection time out


I am running omnibus Gitlab server behind the bastion server on aws. You can only reach to Gitlabserver via Bastion.
I am not able to clone/push repos using SSH in my Mac.
It keeps complaining 'ssh connection is timed out’.

What are the options here I can reach/enable ssh connections?

I spent the whole week trying to figure out but no luck. Your help will be much appreciated