Due to a hardware failure at our hoster, they needed to replace the host which hosted our rsp.mbCONNECT24 EU S1/S2/S3 server instances as well as our Gatekeeper.
During the migration process to another host, the systems needed to be restarted simultaneously which led to some technical issues.
We were able to resolve the situation again without the need of another full restart, at around 9am, the VPN connections to our S1 server were reconnecting and at around 10:30, most connections were back again. Due to the higher load, the login process was still impaired for a little while.
We are in close contact with our hoster to make sure to prevent this for future situations.