There are two machines in the services-testbed project in Cloud-Services (grafana and proba), both of which seem to be unreachable by ssh:
$ ssh -v grafana.eqiad.wmflabs OpenSSH_6.6.1, OpenSSL 1.0.1f 6 Jan 2014 ... debug1: Executing proxy command: exec ssh -a -W grafana.eqiad.wmflabs:22 bastion1.eqiad.wmflabs ... debug1: Enabling compatibility mode for protocol 2.0 channel 0: open failed: connect failed: Connection timed out ssh_exchange_identification: Connection closed by remote host
Using the new DNS scheme (grafana.services-testbed.eqiad.wmflabs) yields the same result. Note that connecting to machines from other projects works fine.
Interestingly, the VMs' consoles show a normal boot sequence (as well as sshd starting) and their stats are available in Labs' nagios.