Microsoft Technology Licensing, LLC

Vikrant Arora

Abhishek Gupta

Shivakumar Thangapandi

Ning Wei

Mohit Kumar Garg

Ashok Kumar Nandoori

Deepak Narula

Amit Kumar Nanda

Nalin Raj Gupta

Yordan Ivanov Rouskov

Abhishek Agarwal

Murli D Satagopan

Anthony Christopher Bloesch

James Charles Kleewein

Titus Constantin Miron

Ashish Bhargava

Robert McKee Howard

Daniel Kershaw

Dmitry Pugachev

Dinesh Kumar Govindasamy

Nicholas David Wood

Sriram Dhanasekaran

Sandeep Bansal

Yina Arenas

Sumit Gupta

Anavi Arun Nahar

Jon Rosenberg

George Kudrayvtsev

Madhan Raj Mookkandy

Akshat Kale

Amol Wate

Nilambari Narayan Deshpande

Simran Rajkumar Nagrani

Raman Deep Singh

Vijaya Manohararaj

Vinaya Natarajan

Marek Rycharski

Arun Venkatachalam

The techniques described herein increase the throughput of a single VPN connection by creating multiple outbound and/or inbound Security Associations (SAs). For instance, two or more different SAs can encrypt outbound data packets to be sent over the VPN connection to a remote device. Moreover, two or more different SAs can decrypt inbound data packets received over the VPN connection from the remote device. Each of the SAs can be bound to a different processing core via the use of a Security Parameter Index (SPI) identifier. Consequently, inbound data packets communicated over a single VPN connection from a remote device to a physical host in a VPN gateway can be distributed amongst multiple processing cores for decryption purposes. Further, outbound data packets to be communicated over the single VPN connection from the physical host to the remote device can be distributed amongst multiple processing cores for encryption purposes.

Throughput for a single VPN connection using multiple processing cores

A virtual private network (VPN) gateway selects a VPN connection, from multiple VPN connections established between a network VPN gateway and a remote VPN gateway, based on performance factors such as throughput. A system may measure throughput in megabytes per second (Mbps). More specifically, a VPN gateway (e.g., a remote VPN gateway or a network VPN gateway) can configure a routing preference that selects a VPN connection that is more performant based on a cryptographic algorithm that is used for the VPN connection. The VPN gateway can update the routing preference to select an alternative VPN connection when the performance of the VPN connection suffers.

Selecting a VPN connection using negotiated cryptographic algorithms to improve throughput

A network interface controller (NIC) associated with a virtual machine (VM) in a cloud computing network is configured to be flexibly attached and detached from a parent NIC to thereby enable the virtual machine to simultaneously be attached to multiple different virtual networks (VNets) and/or subnets that are associated with the same or different subscriptions. The inventive NIC, referred to herein as a flexibly extensible NIC (eNIC), enables a service provider to inject compute instances into an existing VNet using a multi-homing configuration in which the data plane uses a dedicated network interface to connect the customer's VNet, while another dedicated network interface provides management plane connectivity to the service provider. Such multi-VNet homing advantageously provides data plane isolation for the customer's VNet to comply with applicable security policies without disrupting management traffic between the injected resources and the service provider.

Cross-subscription multi-VNet homing

The techniques described herein enable the establishment of two simultaneous virtual private network (VPN) connections for a VPN client operating on a remote computing device. The VPN client can establish first VPN connection with a first VPN server instance of a VPN gateway and a second VPN connection with a second VPN server instance of the VPN gateway. To establish two simultaneous VPN connections, the VPN client is configured to create and/or use two Transmission Control Protocol (TCP) sockets. In one example, a first VPN connection can be a primary VPN connection and a second VPN connection can be a dormant VPN connection configured as a backup in case of a service interruption with the first VPN connection. In another example, a data flow can be split across the first and second VPN connections, or alternate between using the first and second VPN connections, based on performance parameters.

Creating two simultaneous VPN connections for a VPN client

The techniques described herein enable the establishment of two simultaneous virtual private network (VPN) connections between a VPN gateway and a VPN client. The system is configured to update a routing table advertised to network resources when a VPN server instance fails and/or is taken offline. When a first VPN server instance fails and/or is taken offline, the first VPN server instance releases a claim of ownership on its range of IP addresses. After this release occurs, the second VPN server instance is configured to claim ownership of the range of IP addresses that used to be owned by the first VPN server instance. This updated claim of ownership is captured in an updated routing table that can then be advertised to the network resources. Consequently, the network resources use this updated routing table to correctly determine which VPN server instance to send data intended for the VPN client.

Managing data traffic for two simultaneous VPN connections with a VPN client

Techniques of partition abstraction in a wide area network are disclosed herein. In one example, a method includes receiving, at a partition of the wide area network, a request to perform a computing task with a computing resource in the wide area network, the computing resource having a resource identifier. In response to receiving the request, the method also includes determining whether the resource identifier of the computing resource includes a partition embedded globally unique identifier (PEGUID) and in response to determining that the resource identifier includes a PEGUID, extracting the PEGUID from the resource identifier and decoding the PEGUID to identify a partition corresponding to the computing resource.

Partition abstraction in distributed computing systems

Techniques are disclosed for managing gateway switchovers. An indication is received that a primary gateway will be switched to a backup gateway. In response to the indication, a response is made to a periodic health probe that a gateway switchover has been initiated. Incoming data traffic is forwarded from the primary gateway to the backup gateway. Subsequent to an elapsed time delay, a response is made to the periodic health probe that the primary gateway will no longer accept incoming data traffic. The time delay may be based at least in part on one or more of a time interval of the periodic poll and a time to effect the gateway switchover. The forwarding of the incoming data traffic from the primary gateway to the backup gateway is terminated.

Fast failover for gateway instances

Techniques for intelligently managing a virtual private network (VPN) gateway in a cloud computing system are disclosed herein. In one embodiment, an instance of a VPN gateway can query whether a logic lock on a network address is maintained by another instance via periodic renewal. In response to receiving a query result indicating that a logic lock on the network address is lost by the another instance, the instance can migrate a VPN connection originally handled by the another instance from the another instance to the instance such that a private network is connected to the instance via the migrated VPN connection to reduce downtime for accessing computing resources in the cloud computing system.

Virtual private network gateway management

Network services may include data associated with one or more entities. An aggregator service may host respective application programming interfaces (APIs) of the services at a single endpoint of the network such that the entities, including associations and relationships between entities, may be federated. For example, the services may register the entities of which the data of each of the services is associated with through a declarative entity model to establish an API schema for each of the services, which may be published at the aggregator service. In response to receipt of a request for entity related data from a client, the aggregator service may employ the declarative entity model to determine which of the services are associated with the entity related data such that a query may be submitted to the services, and how to aggregate responses to the query received from the services for transmission to the client.

Aggregation and federation of distributed service entities and associations

Methods and devices for load balancing of connections may include receiving, at a management component on a container host on a computer device, at least one data packet based on a destination IP address of the data packet that corresponds to a plurality of container hosts. The methods and devices may include selecting a destination container from at least one container host on the computer device and other computer devices in communication with the computer device over a virtual network to balance a data load and translating the source IP address of the at least one data packet to a local IP address of the container host. The methods and devices may include changing the destination IP address of the at least one data packet to a virtual IP address of the selected destination container so that the at least one data packet is transformed to a proxy data packet.

Non-DSR distributed load balancer with virtualized VIPS and source proxy on load balanced connection

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Redmond, WA, United States of America

Vikrant Arora