A method and system for providing a payment network via a plurality of multiprotocol label switching networks using a network interface device are provided. The method includes receiving, a first network message containing financial transaction data from a first one of a plurality of multiprotocol label switching networks, determining a destination of the financial transaction data from the network message, transmitting the financial transaction data to a second one of the plurality of multiprotocol label switching networks using a second network containing the financial transaction data, where at least one of the first one and the second one of the plurality of multiprotocol label switching networks is an Internet-based network that provides back-up access for transmitting the financial transaction data between a payment card interchange network and at least one of an issuer bank and a merchant bank using a Generic Routing Encapsulation (GRE) tunnel inside an IPSec connection.