If you get your domain from OVH, you get one single mailbox (be it with a lot of aliases, like a different email-address for every service/website you use) for free.
What is your ‘deleted files’ policy? How long do you keep them? I had a similar issue but then found out that the nextcloud cron-process wasn’t running so files in the ‘deleted files’ folder where never really deleted.
Well, based on advice of Samsy, take a backup of home-server network to a NAS on your home-network. (I do home that your server-segment and your home-segment are two seperated networks, no?) Or better, set up your NAS at a friend’s house (and require MFA or a hardware security-key to access it remotely)
I have been looking into a way to copy files from our servers to our S3 backup-storage, without having the access-keys stored on the server. (as I think we can assume that will be one of the first thing the ransomware toolkits will be looking for).
Perhaps a script on a remote machine that initiate a ssh to the server and does a “s3cmd cp” with the keys entered from stdin ? Sofar, I have not found how to do this.
On the other hand, most of the disaster senarios you mention are solved by geographic redundancy: set up your backup // DRS storage in a datacenter far away from the primary service. A scenario where all services,in all datacenters managed by a could-provider are impacted is probably new.
It is something that, considering the current geopolical situation we are now it, -and that I assume will only become worse- that we should better keep in the back of our mind.
In this case, it is not you -as a customer- that gets hacked, but it was the cloud-company itself. The randomware-gang encrypted the disks on server level, which impacted all the customers on every server of the cloud-provider.
The issue is not cloud vs self-hosted. The question is “who has technical control over all the servers involved”. If you would home-host a server and have a backup of that a network of your friend, if your username / password pops up on a infostealer-website, you will be equaly in problem!
Well, the issue here is that your backup may be physically in a different location (which you can ask to host your S3 backup storage in a different datacenter then the VMs), if the servers themselfs on which the service (VMs or S3) is hosted is managed by the same technical entity, then a ransomware attack on that company can affect both services.
So, get S3 storage for your backups from a completely different company?
I just wonder to what degree this will impact the bandwidth-usage of your VM if -say- you do a complete backup of your every day to a host that will be comsidered as “of-premises”
First of all, thanks to all who replied! I didn’t think there would have been that many people who self-host a SSO-server, so I am happy to see these replies.
As a side-note, I have also been looking into making the setup more robust, i.e. add redundancy. For a “light redundant” senario (not fully automatic, but -say- where I have a 2nd instance ready to run, so I just need to adapt the DNS-record if it is needed), can I conclude from the “makeing a backup” question, that I just need to run a 2nd instance of postgres and do streaming-replication from the main instance to the backup-instance ?
Or are there other caviats I haven’t thought about?