Embodiments of the present application provide a packet processing method, an electronic device and a readable storage medium. The method is applied to an electronic device installed with a Virtual Private Network VPN application, and includes: a non-VPN application in the electronic device sending a packet that is to be sent by the non-VPN application to the VPN application through a hardware network module and a virtual network module in the electronic device; the VPN application receiving and analyzing the packet; if the analysis indicates that the packet contains a Domain Name System (DNS) resolution request, the VPN application redirecting the DNS resolution request packet to a preset secure DNS server through the virtual network module and the hardware network module. With embodiments of the present application, the security of software, hardware, and data of an electronic device can be effectively ensured with a reduced cost.

Some embodiments provide a novel method for load balancing data messages that are sent by a source compute node (SCN) to one or more different groups of destination compute nodes (DCNs). In some embodiments, the method deploys a load balancer in the source compute node's egress datapath. This load balancer receives each data message sent from the source compute node, and determines whether the data message is addressed to one of the DCN groups for which the load balancer spreads the data traffic to balance the load across (e.g., data traffic directed to) the DCNs in the group. When the received data message is not addressed to one of the load balanced DCN groups, the load balancer forwards the received data message to its addressed destination. On the other hand, when the received data message is addressed to one of load balancer's DCN groups, the load balancer identifies a DCN in the addressed DCN group that should receive the data message, and directs the data message to the identified DCN. To direct the data message to the identified DCN, the load balancer in some embodiments changes the destination address (e.g., the destination IP address, destination port, destination MAC address, etc.) in the data message from the address of the identified DCN group to the address (e.g., the destination IP address) of the identified DCN.

A system and method for dynamically altering static parameters on a live network device is disclosed. The system includes a live network device having a plurality of parameters configured thereon that control the application of services to subscriber packet flows and a machine learning device operable to monitor the subscriber packet flows and apply a machine learned model to identify patterns in the monitored subscriber pack flows. The machine learning device is further operable to dynamically alter at least one of the plurality of parameters on the network device based upon the patterns in the monitored subscriber packet flows.

A middlebox system that maintains a load balancing configuration in a large scale IoT deployment is provided. The system performs reverse address translation for a first packet of a particular application from a first server to a first client according to a binding structure that couples a source address indicating the first client with (i) a destination addresses indicating the first server and (ii) an application client marker of the first client for the particular application. The system performs reverse address translation for a second packet of the particular application from a second server to the first client by using the application client marker in the binding structure to determine the source address indicating the first client.

An in-vehicle communication device is an in-vehicle communication device that performs a relay process of relaying data between functional units in an in-vehicle network, and includes a communication unit that performs the relay process using correspondence information indicating a correspondence relation between an Internet protocol (IP) address and a media access control (MAC) address of one or more functional units, an address managing unit that generates the correspondence information, and an authenticating unit that performs an authentication process for the functional unit, in which the authenticating unit performs the authentication process for the functional unit in which an IP address and a MAC address are newly registered in the correspondence information by the address managing unit, and the address managing unit deletes the correspondence relation of the functional unit from the correspondence information when the authentication process for the newly registered functional unit is not successfully performed.

A configuration of a cloud application exposed via a public IP address is duplicated with modifications to include a private IP address to expose the application internally. The original configuration is updated so that external network traffic sent to the application is redirected to and distributed across agents running on nodes of a cloud cluster by which web application firewalls (WAFs) are implemented. A set of agents for which the respective WAFs should inspect the redirected network traffic are selected based on cluster metrics, such as network and resource utilization metrics. The redirected network traffic targets a port allocated to the agents that is unique to the application, where ports are allocated on a per-application basis so each of the agents can support WAF protection for multiple applications. Network traffic which a WAF allows to pass is directed from the agent to the application via its private IP address.

Some embodiments provide a system for implementing a logical network that includes a set of end machines, a first logical middlebox, and a second logical middlebox connected by a set of logical forwarding elements. The system includes a set of nodes. Each of several nodes includes (i) a virtual machine for implementing an end machine of the logical network, (ii) a managed switching element for implementing the set of logical forwarding elements of the logical network, and (iii) a middlebox element for implementing the first logical middlebox of the logical network. The system includes a physical middlebox appliance for implementing the second logical middlebox.

Some embodiments provide a system for implementing a logical network that includes a set of end machines, a first logical middlebox, and a second logical middlebox connected by a set of logical forwarding elements. The system includes a set of nodes. Each of several nodes includes (i) a virtual machine for implementing an end machine of the logical network, (ii) a managed switching element for implementing the set of logical forwarding elements of the logical network, and (iii) a middlebox element for implementing the first logical middlebox of the logical network. The system includes a physical middlebox appliance for implementing the second logical middlebox.

Described herein are systems, methods, and software to enhance connectivity between cloud computing service endpoints and virtual machines. In one implementation, a method of managing data packet addressing in a first namespace includes receiving a data packet at a first interface for the first namespace, wherein the first interface is paired with a second interface of a second namespace. The method also includes identifying if the packet is destined for a service node in an underlay network outside of an overlay network for the second namespace, and if destined for a service node outside of an overlay network for the second namespace, modifying addressing in the data packet to support the underlay network and transferring the data packet over a virtual network interface for the virtual machine.

Described herein are systems, methods, and software to enhance connectivity between cloud computing service endpoints and virtual machines. In one implementation, a method of managing data packet addressing in a first namespace includes receiving a data packet at a first interface for the first namespace, wherein the first interface is paired with a second interface of a second namespace. The method also includes identifying if the packet is destined for a service node in an underlay network outside of an overlay network for the second namespace, and if destined for a service node outside of an overlay network for the second namespace, modifying addressing in the data packet to support the underlay network and transferring the data packet over a virtual network interface for the virtual machine.