US 10,652,205 B2 · NAT entry management method and NAT device

Abstract

A NAT entry management method and a NAT device are disclosed. The method includes: receiving and storing, by a NAT device, a connection parameter, where the connection parameter includes an address of a controller; receiving a packet sent by a network device, where a source address of the packet is a private address of the network device and a destination address of the packet is the address of the controller; performing NAT on the packet, where an after-NAT source address of the packet is a public address; and when a static entry condition is met, generating a target static NAT entry, where the static entry condition includes that the destination address of the packet is the address of the controller. This can prevent aging of the NAT entry from affecting communication between the network device and the controller.

Claims9

Dependent claims

A network address translation (NAT) entry management method, comprising:

receiving and storing, by a NAT device, a connection parameter, wherein the connection parameter comprises an address of a controller;
receiving, by the NAT device, a packet sent by a network device, wherein a source address of the packet is a private address of the network device and a destination address of the packet is the address of the controller;
performing, by the NAT device, NAT on the packet, wherein an after-NAT source address of the packet is a public address;
and
when a static entry condition is met, generating, by the NAT device, a target static NAT entry, wherein the target static NAT entry comprises a correspondence between the private address of the network device, a before-NAT source port number of the packet, an after-NAT source port number of the packet, and the address of the controller, and the static entry condition comprises that the destination address of the packet is the address of the controller.

2 more elements

A network address translation (NAT) device, comprising a memory, a processor, and a communications interface, wherein:

the processor is configured to:
receive a connection parameter by using the communications interface and store the connection parameter in the memory, wherein the connection parameter comprises an address of a controller;
receive, by using the communications interface, a packet sent by a network device, wherein a source address of the packet is a private address of the network device and a destination address of the packet is the address of the controller;
perform NAT on the packet, wherein an after-NAT source address of the packet is a public address;
and
generate a target static NAT entry when a static entry condition is met, wherein the target static NAT entry comprises a correspondence between the private address of the network device, a before-NAT source port number of the packet, an after-NAT source port number of the packet, and the address of the controller, and the static entry condition comprises that the destination address of the packet is the address of the controller.

3 more elements

Dependencies are inferred from the claim text.

NAT entry management method and NAT device

Life of this patent

NAT entry management method and NAT device

Life of this patent

Abstract

Claims9