I want to clarify about vpn security?

Question

VPN

I want to order a vpn, I have never worked with it, so there are questions about security:
1) Do those who provide vpn services have the ability to intercept my traffic and read it, for example, intercept passwords or some other important personal data?
2) Can they also intercept the files that I work with via ftp through the file zil or not?
3) I took a closer look at hideme.ru, what do you think? Good anonymity and security?
I will be very happy with your answer. Thank you.

Answer 1

Vlad, I'm doing an educational program:
VPN is a virtual network technology, it should be understood as follows: on top of an existing network, you build a new, virtual one. It is, as it were, located inside (or "on top", which metaphor is easier for anyone to perceive) the current copper network (and a bunch of other equipment) and lives by its own rules. In the operating system, usually, such a network is visible as a separate network interface, with its own protocols and addresses, and the operating system (and applications) can work with this interface, can go to some or all networks through this interface.
The traffic sent to this network interface is encapsulated (each individual packet is placed in another packet) and transmitted to the VPN server, where, on the server, the traffic goes outside and already from the server goes to the recipient, most often, the recipient will see the server address in the sender field (that is, your computer will be kind of disguised), but this is not necessary (for example, VPN through which some operators give the Internet works exactly the opposite, through gray networks you get a white address on the OS interface that everyone on the Internet sees ).
From the fact that the traffic passes through the server, it follows that the entire flow of your traffic is visible on the server, just like if there was a regular router in its place, i.e. everything that is visible on your router (without VPN) is visible on the VPN server (again, which is logical, if you have VPN).
Those. the logic is this, on the VPN server you can intercept everything that can be intercepted if you stand in the gap between you and the provider in normal (without VPN) life. And these are all text protocols and not encrypted data.
I hope I explained more than confused =)
And now the answers:
1. Maybe he even does it. Most likely all providers of such services do this. Like the paranoid in me says.
But they can only see what you show them, for example they can intercept all http\ftp traffic, but they can't ssl.
2. Ftp can, sFTP or FTPs can't, filezilla works with many protocols, some of them are resistant to interception, some are not.
3. Norm.