Identifying bogon address spaces

• US 10,516,586 B2
• Filed: 06/02/2016
• Issued: 12/24/2019
• Est. Priority Date: 06/05/2015
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Gandham, Shashidhar, Prasad, Rohit Chandra, Singh, Abhishek Ranjan, Yadav, Navindra, Deen, Khawar, Malhotra, Varun Sagar
• Primary Examiner(s): Wong, Xavier Szewai
• Application Number:
  US15/171,836
• Publication Number:
  US 20160359699A1
• Time in Patent Office: 1,300 Days
• CPC Class Codes: G06F 16/122 using management policies backup systems G06F11/1446; file migration policies for HSM systems G06F16/185
• CPC Class Codes: G06F 16/137 Hash-based content-based indexing of textual data G06F16/31
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• CPC Class Codes: G06F 9/45558 : Hypervisor-specific management and integration aspects
• CPC Class Codes: G06N 20/00 : Machine learning
• CPC Class Codes: G06N 99/00 : Subject matter not provided for in other groups of this subclass
• CPC Class Codes: G06T 11/206 : Drawing of charts or graphs
• CPC Class Codes: H04J 3/0661 : using timestamps
• CPC Class Codes: H04J 3/14 : Monitoring arrangements for SDH/SONET rings H04J3/085
• CPC Class Codes: H04L 1/242 : by comparing a transmitted test signal with a locally generated replica
• CPC Class Codes: H04L 41/046 : comprising network management agents or mobile agents therefor
• CPC Class Codes: H04L 41/0668 : by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
• CPC Class Codes: H04L 41/0803 : Configuration setting
• CPC Class Codes: H04L 41/0806 : for initial configuration or provisioning, e.g. plug-and-play
• CPC Class Codes: H04L 41/0816 : the condition being an adaptation, e.g. in response to network events
• CPC Class Codes: H04L 41/0893 : Assignment of logical groups to network elements
• CPC Class Codes: H04L 41/0894 : Policy-based network configuration management
• CPC Class Codes: H04L 41/12 : Discovery or management of network topologies
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• CPC Class Codes: H04L 41/22 : comprising specially adapted graphical user interfaces [GUI]
• CPC Class Codes: H04L 41/40 : using virtualisation of network functions or resources, e.g. SDN or NFV entities
• CPC Class Codes: H04L 43/02 : Capturing of monitoring data
• CPC Class Codes: H04L 43/026 : using flow identification
• CPC Class Codes: H04L 43/04 : Processing captured monitoring data, e.g. for logfile generation
• CPC Class Codes: H04L 43/045 : for graphical visualisation of monitoring data
• CPC Class Codes: H04L 43/062 : related to network traffic
• CPC Class Codes: H04L 43/08 : Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
• CPC Class Codes: H04L 43/0805 : by checking availability
• CPC Class Codes: H04L 43/0811 : by checking connectivity
• CPC Class Codes: H04L 43/0829 : Packet loss
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• CPC Class Codes: H04L 43/0858 : One way delays
• CPC Class Codes: H04L 43/0864 : Round trip delays
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• CPC Class Codes: H04L 43/0882 : Utilisation of link capacity
• CPC Class Codes: H04L 43/0888 : Throughput
• CPC Class Codes: H04L 43/10 : Active monitoring, e.g. heartbeat, ping or trace-route
• CPC Class Codes: H04L 43/106 : using time related information in packets, e.g. by adding timestamps
• CPC Class Codes: H04L 43/12 : Network monitoring probes
• CPC Class Codes: H04L 43/16 : Threshold monitoring
• CPC Class Codes: H04L 43/20 : the monitoring system or the monitored elements being virtualised, abstracted or software-defined entities, e.g. SDN or NFV
• CPC Class Codes: H04L 45/306 : Route determination based on the nature of the carried application
• CPC Class Codes: H04L 45/38 : Flow based routing
• CPC Class Codes: H04L 45/46 : Cluster building
• CPC Class Codes: H04L 45/507 : Label distribution
• CPC Class Codes: H04L 45/66 : Layer 2 routing, e.g. in Ethernet based MAN's
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• CPC Class Codes: H04L 47/11 : Identifying congestion
• CPC Class Codes: H04L 47/20 : Traffic policing
• CPC Class Codes: H04L 47/2441 : relying on flow classification, e.g. using integrated services [IntServ]
• CPC Class Codes: H04L 47/2483 : involving identification of individual flows
• CPC Class Codes: H04L 47/28 : in relation to timing considerations
• CPC Class Codes: H04L 47/31 : by tagging of packets, e.g. using discard eligibility [DE] bits
• CPC Class Codes: H04L 47/32 : by discarding or delaying data units, e.g. packets or frames
• CPC Class Codes: H04L 61/5007 : Internet protocol [IP] addresses
• CPC Class Codes: H04L 63/0227 : Filtering policies mail message filtering H04L51/212
• CPC Class Codes: H04L 63/0263 : Rule management
• CPC Class Codes: H04L 63/06 : for supporting key management in a packet data network cryptographic mechanisms or cryptographic arrangements for key management H04L9/08
• CPC Class Codes: H04L 63/0876 : based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint
• CPC Class Codes: H04L 63/1408 : by monitoring network traffic monitoring network traffic per se H04L43/00
• CPC Class Codes: H04L 63/1416 : Event detection, e.g. attack signature detection
• CPC Class Codes: H04L 63/1425 : Traffic logging, e.g. anomaly detection
• CPC Class Codes: H04L 63/1433 : Vulnerability analysis
• CPC Class Codes: H04L 63/1441 : Countermeasures against malicious traffic countermeasures against attacks on cryptographic mechanisms H04L9/002
• CPC Class Codes: H04L 63/145 : the attack involving the propagation of malware through the network, e.g. viruses, trojans or worms
• CPC Class Codes: H04L 63/1458 : Denial of Service
• CPC Class Codes: H04L 63/1466 : Active attacks involving interception, injection, modification, spoofing of data unit addresses, e.g. hijacking, packet injection or TCP sequence number attacks
• CPC Class Codes: H04L 63/16 : Implementing security features at a particular protocol layer
• CPC Class Codes: H04L 63/20 : for managing network security; network security policies in general filtering policies H04L63/0227
• CPC Class Codes: H04L 67/01 : Protocols
• CPC Class Codes: H04L 67/10 : in which an application is distributed across nodes in the network software deployment G06F8/60; multiprogramming arrangements G06F9/46
• CPC Class Codes: H04L 67/1001 : for accessing one among a plurality of replicated servers
• CPC Class Codes: H04L 67/12 : specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04L 67/51 : Discovery or management thereof, e.g. service location protocol [SLP] or web services
• CPC Class Codes: H04L 67/535 : Tracking the activity of the user network monitoring arrangements H04L43/00; recording of computer activity G06F11/34
• CPC Class Codes: H04L 67/75 : Indicating network or usage conditions on the user display
• CPC Class Codes: H04L 69/16 : Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• CPC Class Codes: H04L 69/22 : Parsing or analysis of headers
• CPC Class Codes: H04L 7/10 : Arrangements for initial synchronisation
• CPC Class Codes: H04L 9/0866 : involving user or device identifiers, e.g. serial number, physical or biometrical information, DNA, hand-signature or measurable physical characteristics
• CPC Class Codes: H04L 9/3239 : involving non-keyed hash functions, e.g. modification detection codes [MDCs], MD5, SHA or RIPEMD
• CPC Class Codes: H04L 9/3242 : involving keyed hash functions, e.g. message authentication codes [MACs], CBC-MAC or HMAC
• CPC Class Codes: H04W 72/54 : based on quality criteria
• CPC Class Codes: H04W 84/18 : Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

Systems, methods, and computer-readable media for identifying bogon addresses. A system can obtain an indication of address spaces in a network. The indication can be based on route advertisements transmitted by routers associated with the network. The system can receive a report generated by a capturing agent deployed on a host. The report can identify a flow captured by the capturing agent at the host. The system can identify a network address associated with the flow and, based on the indication of address spaces, the system can determine whether the network address is within the address spaces in the network. When the network address is not within the address spaces in the network, the system can determine that the network address is a bogon address. When the network address is within the address spaces in the network, the system can determine that the network address is not a bogon address.

Claims

1. A method comprising:

obtaining an indication of network address spaces in a network, the indication of network address spaces being based on route advertisements transmitted by a plurality of routers associated with the network, the route advertisements identifying the network address spaces in the network;

receiving a data report generated by a capturing agent deployed on a host in the network, the data report identifying a network flow captured by the capturing agent at the host;

identifying a network address associated with the network flow;

based on the indication of network address spaces, determining whether the network address associated with the network flow is within the network address spaces in the network;

when the network address is not within the network address spaces in the network, determining that the network address is a bogon address and updating the data report identifying the network flow; and

when the network address is within the network address spaces in the network, determining that the network address is not the bogon address and allowing the network flow and the data report to be processed by one or more systems in the network.

2. The method of claim 1, further comprising:

based on the determination that the network address is the bogon address, filtering the network flow.

3. The method of claim 1, wherein the network flow is a first network flow and the data report is a first data report, the method further comprising:

based on the determination that the network address is the bogon address, filtering at least one of a second network flow associated with the network address and a second data report identifying at least one of the first network flow and the second network flow.

4. The method of claim 1, further comprising:

based on the determination that the network address is the bogon address, marking the network flow as a bogon network flow.

5. The method of claim 1, further comprising:

based on the determination that the network address is the bogon address, marking one or more network flows associated with the network address as bogon network flows.

6. The method of claim 1, wherein the plurality of routers comprises border gateway protocol (BGP) routers.

7. The method of claim 1, wherein the capturing agent comprises at least one of a process, a kernel module, or a software driver.

8. The method of claim 7, wherein the capturing agent resides in one of a hypervisor on the host or a virtual machine on the hypervisor, the network flow being sent or received by the one of the hypervisor or the virtual machine.

9. The method of claim 1, wherein the indication of network address spaces associated with the network comprises a mapping of network address spaces in the network, and wherein the network address spaces comprise at least one of:

one or more internet protocol addresses;

one or more internet protocol address ranges; and

one or more prefixes.

10. A system comprising:

one or more processors; and

one or more computer-readable storage devices having stored therein instructions which, when executed by the one or more processors, cause the one or more processors to perform operations comprising;

obtaining an indication of network address spaces in a network, the indication of network address spaces being based on route advertisements transmitted by a plurality of routers associated with the network, the route advertisements identifying the network address spaces in the network;

receiving a data report generated by a capturing agent deployed on a host in the network, the data report identifying a network flow captured at the host by the capturing agent;

identifying a network address associated with the network flow;

based on the indication of network address spaces, determining whether the network address associated with the network flow is within the network address spaces in the network;

when the network address is not within the network address spaces in the network, determining that the network address is a bogon address and updating the data report identifying the network flow; and

when the network address is within the network address spaces in the network, determining that the network address is not the bogon address and allowing the network flow and the data report to be processed by one or more systems in the network.

11. The system of claim 10, the one or more computer-readable storage devices storing additional instructions which, when executed by the one or more processors, cause the one or more processors to perform operations comprising:

based on the determination that the network address is the bogon address, filtering the network flow.

12. The system of claim 10, the one or more computer-readable storage devices storing additional instructions which, when executed by the one or more processors, cause the one or more processors to perform operations comprising:

based on the determination that the network address is the bogon address, filtering at least one of a subsequent network flow associated with the network address and a subsequent data report identifying the subsequent network flow.

13. The system of claim 10, the one or more computer-readable storage devices storing additional instructions which, when executed by the one or more processors, cause the one or more processors to perform operations comprising:

based on the determination that the network address is the bogon address, marking the network flow as a bogon network flow.

14. The system of claim 10, wherein the plurality of routers comprises border gateway protocol (BGP) routers, and wherein the capturing agent resides in one of a hypervisor on the host or a virtual machine on the hypervisor, the network flow being part of traffic sent or received by at least one of the hypervisor and the virtual machine.

15. A computer-readable storage device storing instructions which, when executed by a processor, cause the processor to perform operations comprising:

detecting route advertisements transmitted by a plurality of routers associated with a network, the route advertisements identifying valid network address spaces in the network;

based on the route advertisements, obtaining an indication of network address spaces associated with the network;

receiving, by a system, a data report generated by a capturing agent deployed on a host in the network, the data report identifying a network flow captured at the host by the capturing agent;

identifying, by the system, a network address associated with the network flow;

based on the indication of network address spaces, determining, by the system, whether the network address associated with the network flow is within the network address spaces in the network;

when the network address is not within the network address spaces in the network, determining, by the system, that the network address is a bogon address and updating the data report identifying the network flow; and

when the network address is within the network address spaces in the network, determining, by the system, that the network address is not the bogon address and allowing the network flow and the data report to be processed by one or more systems in the network.

16. The computer-readable storage device of claim 15, wherein the capturing agent comprises at least one of a process, a kernel module, or a software driver, and wherein the capturing agent resides in one of a hypervisor on the host or a virtual machine on the hypervisor, the network flow being sent or received by the one of the hypervisor or the virtual machine.

17. The computer-readable storage device of claim 15, storing additional instructions which, when executed by the processor, cause the processor to perform operations comprising:

based on the determination that the network address is the bogon address, marking one or more network flows associated with the network address as bogon network flows.

18. The computer-readable storage device of claim 15, storing additional instructions which, when executed by the processor, cause the processor to perform operations comprising:

based on the determination that the network address is the bogon address, filtering one or more network flows associated with the network address and one or more data reports identifying the one or more network flows.

19. The computer-readable storage device of claim 15, wherein the plurality of routers comprises border gateway protocol (BGP) routers, and wherein obtaining the indication of network address spaces associated with the network comprises generating a map of address spaces in the network, the address spaces comprising at least one of internet protocol addresses and one or more ranges of internet protocol addresses.