Since a potential DoS attack from the Internet would go over the shared PE, the VPNs
connected to this PE might be affected as well. (Note that this might also be a different VPN
customer.) Theoretically, this offers higher DoS resistance for the customer’s VPN part
because the customer’s own VPN network is separated. In this case, a DoS attack against
the Internet part of the customer would only affect the VPN part if it is strong enough to
affect the PE router. Every other part of the setup is still separated.
The service provider will be able to offer this service at lower cost because only a single PE ...
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