Why is the server (vps/vds) banned if DOS hit it?

Question

Network administration

There are some basic questions about the work of VPS / VDS hosting providers on the Internet.
To begin with, I have little idea how one or more servers providing hosting provider services can have a huge amount of ip (each client has its own ip).
1. If my server is blocked, then the hosting provider simply disables it?
2. What is he guided by in this?
3. Do they not provide default protection at all?
4. That is, if you do not timely disable the client that was hit by a DOS attack, will it affect other servers located on this hosting? If yes.. then how? If I understand correctly, then the client cannot, under any circumstances, take more resources than he was allocated.

Answer 1

1. Depends on the host and attack power.
   PS DOS stands for Disk Operating System , and the abbreviation for Denial of Service is DoS.

Answer 2

Protection can be provided free of charge, within reasonable limits. This needs to be checked with the provider.
It is easier for large hosting providers to organize protection than small ones.
If I understand correctly, then the client cannot, under any circumstances, take more resources than he was allocated.
How else can. Usually the nuts are not all tightened. This is necessary for the comfortable operation of client VMs.

Answer 3

Firstly, the client can consume the resources that he bought, and the hoster sells them, taking into account the fact that you do not always consume them 100 percent
. clients

Answer 4

The traffic of such a machine with VDS is cut. This is written in the purchase agreement. This means that the hoster does not have traffic limiting tools.

Answer 5

Your VPS/VDS is physically located on the same server as other clients.
If a large flow of requests goes to it, and the hoster does not have the ability to limit it, attackers can clog the channel on the hoster's server, or create a large load on the server (on its file system, for example), which may affect other clients located on this server.
Therefore, your VPS / VDS can be disabled. But, as Sergey Gornostaev wrote above, it depends on the hoster and agreements.