How private is a vps?
How private is a vps?
Can the vps provider not read everything on your server, unless it's explicitly encrypted?
I'm asking because I'm interested in self-hosting mainly as a way to get privacy respecting services where good hosted ones don't exist. I'm not sure I really want to deal with running my own hardware
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If it is in the RAM, they can read it. Since it is a virtual server they can freeze and clone the current state and connect to that copy and read all data that is currently encrypted/opened without you even knowing.
Technically a lot of the newer chips used in datacenters support encrypted VMs which encrypts the RAM too, although you still have to trust that the hosting provider uses that feature.
Irrelevant unless you own the key they are using for it
I'm assuming that would drive up costs, so not very many use it
They will offer it as an optional service and charge you for it. So yes they use it.
While this is technically true, there is no provider on the planet that can freeze state of RAM in a way that would be useful for this.
It's technically feasible to recover data on a laptop's RAM, but not from a virtualized multi-tenant instance tied to a specific user.
Dunno what rock you were hiding under but this is absolutely possible in a hosted environment. There's even ESXi documentation on how to do it. Taking a snapshot can be detected, but can't be prevented. These memory dumps can include encryption keys, private keys (such as SSL certificates) and other sensitive data.
Unless you can physically touch the drive with your data on it, I would not store any sensitive data on it, encrypted or not.
Lol, brah...you apparently have no idea what in the fuck you're talking about, because a memory is not what OP is talking about 🤣🤣🤣
A memory dump has nothing to do with ESXi, it's just a thing that has existed forever. The fact you even pulled this out of your ass is absolutely, and shows how dead your knowledge is. Wow.
there is no provider on the planet that can freeze state of RAM in a way that would be useful for this
You are very mistaken, this is a well-supported feature in most modern virtualization environments.
Here are XenServer docs for it. And here is VMWare's "high-frequency" snapshots page.
Sometimes, law enforcement authorities only need to contact cloud provider A when they have a warrant for (or, perhaps, no warrant but a mere request for) data about some user C who is indirectly using A via some cloud-hosted online service B.
A(mazon) will dutifully deliver to the authorities snapshots of all of B's VMs, and then it is up to them if they limit themselves to looking for data about C... while the staff of company B can honestly say they have not received any requests from law enforcement. (sorry my best source on this at the moment is sadly trust me bro; I've heard from an AWS employee that the above scenario really actually does happen.)
I'm not talking about snapshots. I'm talking about viewing the RAM of a running instance and having that be useful for anyone who managed to get it. And let me give you two simple reasons why it's not going to be useful:
- Encryption extensions at the CPU
- Hypervisor resource evictions
Unless you were to go and be on that instance at the exact moment something was happening (or shortly thereafter), that memory is going to be useless.
Now, if someone were absolutely stupid, disabled CPU security extensions at the Hypervisor, AND did something like make a RAM disk and stored something on that-which is really just going out your way to leave a trail-then yeah, maybe you'd get something.
The default of every hosting provider I'm familiar with is encryption by default on absolutely everything from the Hypervisor up except the disk, so I'm seriously doubting the claim of OP unless there is otherwise non-TMB information.
Disk snapshots are another story if unencrypted.
Here's a snapshot of the memory of a running live cd of Ubuntu. I ran a script to load 0123456789abcdef over and over and it's clearly readable. Nothing special is required for this, as the Hypervisor has access to anything that the VM does. If the VM loads the encryption key for your disk into memory it will be available to the provider.
You don't need to freeze the state of the RAM, you freeze the whole virtual machine - including the virtual RAM.
Did you read the original comment???
What do you think the “v” in “vps” stands for?
