Method and system for redirecting networked traffic
First Claim
Patent Images
1. A method of redirecting network traffic at an intermediate network device from an uncontrolled network to a controlled network, the method comprising:
- receiving, from a first network element, a plurality of Internet Protocol (IP) packets initially routed to the uncontrolled network;
rewriting IP packet header information of at least one of the plurality of IP packets based on a service class of the first network element, the service class of the first network element being maintained at the intermediate device, wherein rewriting the IP packet header information of the at least one IP packet includes rewriting a type of service field to include a service code indicating that the at least one IP packet cannot access the uncontrolled network, andbased on the rewritten IP packet header information, redirecting the at least one IP packet to the controlled network.
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Abstract
A method of redirecting network traffic from a first, uncontrolled network to a second, controlled network by rewriting the Type of Service field in the header information of an Internet Protocol (IP) packet so as to include a service code indicating that the IP packet cannot access the uncontrolled network, thereby redirecting the network traffic to a second network element.
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Citations
17 Claims
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1. A method of redirecting network traffic at an intermediate network device from an uncontrolled network to a controlled network, the method comprising:
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receiving, from a first network element, a plurality of Internet Protocol (IP) packets initially routed to the uncontrolled network; rewriting IP packet header information of at least one of the plurality of IP packets based on a service class of the first network element, the service class of the first network element being maintained at the intermediate device, wherein rewriting the IP packet header information of the at least one IP packet includes rewriting a type of service field to include a service code indicating that the at least one IP packet cannot access the uncontrolled network, and based on the rewritten IP packet header information, redirecting the at least one IP packet to the controlled network. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of redirecting network traffic at an intermediate network device from an uncontrolled network to a controlled network, the method comprising:
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receiving, from a first network element, a plurality of Internet Protocol (IP) packets initially routed to the uncontrolled network; rewriting IP packet header information of a first one of the plurality of IP packets based on a service class of the first network element, the service class of the first network element being maintained at the intermediate device; rewriting IP packet header information of a second one of the plurality of IP packets based on a service class of a second network element, the service class of the second network element maintained at the intermediate device; rewriting a type of service field of the IP packet header information of the second one of the IP packets to include a service code indicating that the second one of the plurality of IP packets can access the controlled network; and based on the rewritten IP packet header information, redirecting the second one of the plurality of IP packet to the controlled network.
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11. A method of redirecting network traffic at an intermediate network device, from an uncontrolled network to a controlled network, the method comprising:
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receiving an Internet Protocol (IP) packet that designates the uncontrolled network as a destination address; redirecting the IP packet to the controlled network based on a type of service field of IP packet header information of the IP packet; comparing a service code stored in the type of service field to an access control list maintained at the intermediate device; and routing the IP packet through a tunnel interface. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method of redirecting network traffic at an intermediate network device, from an uncontrolled network to a controlled network, the method comprising:
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receiving an Internet Protocol (IP) packet that designates the uncontrolled network as a destination address; redirecting the IP packet to the controlled network based on a type of service field of IP packet header information of the IP packet; and routing the IP packet through a tunnel interface based on a route map directive that causes redirection of the IP packet to the controlled network.
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Specification