Systems and methods for identifying the services of a network
First Claim
1. A method for passively and automatically identifying a service running on a network device of a network, comprising:
- reading a packet transmitted by the network device on the network;
decoding the packet into plural protocol fields;
comparing the plural protocol fields to pre-defined protocol fields which collectively identify a service and are stored in a service identifying data structure, the structure and content of the protocol fields being compared, instead of identifying the service from a port of the packet; and
recording a service from the service identifying structure which has protocol fields that match the protocol fields decoded from the packet as the service running on the network device,the plural protocol fields being application protocol fields.
3 Assignments
0 Petitions
Accused Products
Abstract
A packet transmitted on a network is read and decoded. A network device and its operating system are identified by analyzing the decoded packet. If more than one operating system is identified from the decoded packet, the operating system is selecting by comparing confidence values assigned to the operating systems identified. A service running on the network device is identified from the decoded packet or subsequent packets that are read, decoded and analyzed. The network topology of a network is determined by reading, decoding, and analyzing a plurality of packets. A flow between two network devices is determined by reading, decoding, and analyzing a plurality of packets. Vulnerabilities are assigned to operating systems and services identified by reading, decoding, and analyzing packets. Network configuration policy is enforced on operating systems and services identified by reading, decoding, and analyzing packets.
149 Citations
19 Claims
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1. A method for passively and automatically identifying a service running on a network device of a network, comprising:
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reading a packet transmitted by the network device on the network; decoding the packet into plural protocol fields; comparing the plural protocol fields to pre-defined protocol fields which collectively identify a service and are stored in a service identifying data structure, the structure and content of the protocol fields being compared, instead of identifying the service from a port of the packet; and recording a service from the service identifying structure which has protocol fields that match the protocol fields decoded from the packet as the service running on the network device, the plural protocol fields being application protocol fields. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for passively and automatically identifying a service running on a network device of a network, comprising:
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identifying a flow between an initiator network device and a responder network device by reading, decoding, and analyzing two or more packets transmitted on the network; identifying one or more packets of the flow as one or more initiator packets; identifying one or more packets of the flow as one or more responder packets; if plural protocol fields of the one or more initiator packets match predefined initiator protocol fields which collectively identify the service and if protocol fields of the one or more responder packets match predefined responder protocol fields which collectively identify the service, then identifying the service of the matched protocol fields as a service running on one of the initiator network device and the responder network device, the structure and content of the plural protocol fields being compared, instead of identifying the service from a port of the packets, the plural protocol fields being application protocol fields. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method for passively and automatically identifying a service running on a network device of a network, comprising:
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maintaining a service identifying data structure that comprises one or more predefined protocol fields collectively identifying one or more services; identifying a flow between an initiator network device and a responder network device by reading, decoding, and analyzing two or more packets transmitted on the network; comparing plural pre-defined protocol fields, which collectively identify a service, of one or more packets of the flow to the plural protocol fields of the one or more services of the service identifying data structure, the structure and content of the protocol fields being compared instead of identifying the service from a port of the one or more packets; and recording a service from the service identifying structure which has plural protocol fields that match the plural protocol fields of the one or more packets as the service of one of the initiator network device and the responder network device, the plural protocol fields being application protocol fields. - View Dependent Claims (17, 18, 19)
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Specification