What could be the problem with VPN connection?

Question

VPN

Such a problem: they connected the Internet under a new contract. My wife's job is through VPN + RDP.
Right after connection - the connection was cut off. Router: Technicolor CGA2121. Where to look?
The VPN server responds, but does not start up. While connecting: The required server response was not received.

Answer 1

providers do not like PPTP
use Open or other options