I have tried SSHing from JupyterHub and the end of the log now has these new statements:
debug1: Remote: /home/rsinha8_0000056965/.ssh/authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug1: Remote: /home/rsinha8_0000056965/.ssh/authorized_keys:1: key options: agent-forwarding port-forwarding pty user-rc x11-forwarding
debug1: client_input_global_request: rtype keepalive@openssh.com want_reply 1
debug1: client_input_global_request: rtype keepalive@openssh.com want_reply 1
debug1: client_input_global_request: rtype keepalive@openssh.com want_reply 1
debug1: client_input_global_request: rtype keepalive@openssh.com want_reply 1
channel 0: open failed: connect failed: Connection timed out
stdio forwarding failed
kex_exchange_identification: Connection closed by remote host
Connection closed by UNKNOWN port 65535
Unsure why connection is timing out.