Device visibility and scanning including network segments

Patent metadata

Field	Value
Publication number	US-11909767-B2
Application number	US-202016924508-A
Country	US
Kind code	B2
Filing date	Jul 9, 2020
Priority date	Mar 26, 2018
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

Device scanning aspects are described. In certain aspects, the method includes configuring a port forwarding policy on a first device based on a network session information, performing a scan of a second device based on a port forwarding policy.

First claim

What is claimed is:

1. A method comprising:
configuring, by a processing device, a port forwarding policy on a first device based on network session information associated with the first device, wherein the network session information comprises a first address identifying the first device and a second address identifying a second device, wherein the second device is configured to communicate through the first device;
generating, by the processing device, an identifier associated with the second device based on a combination of the first address and the second address of the network session information;
scanning, by the processing device, the second device based on the identifier of the second device and the port forwarding policy, including sending, by the processing device, a scan request to the first device, wherein the first device forwards the scan request to the second device according to the port forwarding policy; and
storing, by the processing device, the results of the scanning.

2. The method of claim 1 , further comprising:
performing an action based on the scanning.

3. The method of claim 1 , generating the identifier associated with the second device comprises:
selecting the first device based on the first device performing network address translation (NAT), wherein the first device is communicatively coupled to the second device, and wherein the second device is configured to communicate with a network through the first device;
accessing the network session information associated with the first device, wherein the network session information comprises a private address associated with the second device; and
determining the identifier associated with the second device based on the private address of the network session information, wherein the private address corresponds to the second address.

4. The method of claim 1 , wherein the second device is a NAT device, further comprising:
accessing the network session information associated with the first device, wherein the network session information comprises a third address associated with a third device;
determining, with the processing device, an identifier associated with the third device based on the first address and the third address of the network session information;
configuring an additional port forwarding policy on the first device based on the identifier associated with the first device;
scanning, by the processing device, the third device based on the additional port forwarding policy, including sending, by the processing device, an additional scan request to the first device, wherein the first device forwards the additional scan request to the third device according to the additional port forwarding policy; and
storing the results of the scanning of the third device.

5. The method of claim 1 , wherein the first device is at least one of a router, a firewall, a switch, or a carrier grade (CG) NAT device.

6. The method of claim 1 , wherein the port forwarding policy of the first device is configured using at least one of an application programming interface (API), command line interface (CLI), or a simple network management protocol (SNMP) interface.

7. The method of claim 1 further comprising:
determining an operating system (OS) of the second device based on the network session information.

8. The method of claim 1 , wherein the identifier of the second device comprises a unique identifier comprising an IP address associated with the second device and an IP address associated with the first device.

9. The method of claim 8 , wherein the unique identifier of the second device further comprises a media access control (MAC) address associated with the first device.

10. A system comprising:
a memory; and
a processing device, operatively coupled to the memory, to:
configure a port forwarding policy on a first device based on a network session information associated with the first device, wherein the network session information comprises a first address identifying the first device and a second address identifying a second device, wherein the second device is configured to communicate through the first device;
generate an identifier associated with the second device based on a combination of the first address and the second address of the network session information;
scan the second device based on the identifier of the second device and the port forwarding policy, including to send a scan request to the first device, wherein the first device forwards the scan request to the second device according to the port forwarding policy; and
store the results of the scan in the memory.

11. The system of claim 10 , wherein the processing device further to perform an action based on the scan.

12. The system of claim 11 , wherein the first device is at least one of a router, a firewall, a switch, or a carrier grade (CG) NAT device.

13. The system of claim 11 , wherein the port forwarding policy of the first device is configured using an application programming interface (API).

14. The system of claim 10 , wherein to generate the identifier associated with the second device comprises to:
select the first device, communicatively coupled to a network, based on the first device performing network address translation (NAT), wherein the second device is configured to communicate with a network through the first device;
access the network session information associated with the first device, wherein the network session information comprises a private address associated with the second device; and
determine the identifier associated with the second device based on the private address of the network session information, wherein the private address corresponds to the second address.

15. The system of claim 10 , wherein the processing device further to determine an operating system (OS) of the second device based on the network session information.

16. The system of claim 10 , wherein the identifier of the second device comprises a unique identifier comprising an IP address associated with the second device and an IP address associated with the first device.

17. The system of claim 16 , wherein the unique identifier of the second device further comprises a media access control (MAC) address associated with the first device.

18. A non-transitory computer readable medium having instructions encoded thereon that, when executed by a processing device, cause the processing device to:
configure, by the processing device, a port forwarding policy on a first device based on a network session information associated with the first device, wherein the network session information comprises a first address identifying the first device and a second address identifying a second device, wherein the second device is configured to communicate through the first device;
generate an identifier associated with the second device based on a combination of the first address and the second address of the network session information;
scan the second device based on the identifier of the second device and the port forwarding policy, including to send a scan request to the first device, wherein the first device forwards the scan request to the second device according to the port forwarding policy; and
store the results of the scan.

19. The non-transitory computer readable medium of claim 18 , wherein the instructions further cause the processing device to perform an action based on the scan.

20. The non-transitory computer readable medium of claim 18 , wherein to gene

Assignees

• Forescout Tech Inc

Inventors

• Yang Siying

Classifications

• H04L63/20 Primary

  for managing network security; network security policies in general (filtering policies H04L63/0227) · CPC title

• H04L41/0213

  Standardised network management protocols, e.g. simple network management protocol [SNMP] · CPC title

• H04L47/20

  Traffic policing · CPC title

• H04L61/256

  NAT traversal · CPC title

• H04L63/029

  Firewall traversal, e.g. tunnelling or, creating pinholes · CPC title