staging.gitlab.com is down
ssh -v user@staging.gitlab.com
OpenSSH_7.3p1, OpenSSL 1.0.2j 26 Sep 2016
debug1: Connecting to staging.gitlab.com [23.96.124.181] port 22.
debug1: Connection established.
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.3
ssh_exchange_identification: Connection closed by remote host