RULE-BASED ROUTING TO RESOURCES THROUGH A NETWORK

• US 20140053237A1
• Filed: 10/24/2013
• Published: 02/20/2014
• Est. Priority Date: 12/10/2003
• Status: Active Grant

• Current Assignee: Aventail LLC
• Original Assignee: Aventail LLC
• Inventors: Hopen, Chris, Sauve, Bryan, Hoover, Paul, Perry, Bill
• Granted Patent: US 9,197,538 B2
• Time in Patent Office: Days
• US Class Current: 726/1
• CPC Class Codes: G06F 21/6218 to a system of files or objects, e.g. local or distributed file system or database
• CPC Class Codes: H04L 12/4641 Virtual LANs, VLANs, e.g. virtual private networks [VPN] LAN interconnection over a bridge based backbone H04L12/462; encapsulation techniques H04L12/4633; routing of packets H04L45/00; packet switches H04L49/00; virtual private networks for security H04L63/0272
• CPC Class Codes: H04L 45/14 Routing performance; Theoretical aspects
• CPC Class Codes: H04L 47/70 Admission control; Resource allocation
• CPC Class Codes: H04L 61/5007 Internet protocol [IP] addresses
• CPC Class Codes: H04L 63/0272 Virtual private networks
• CPC Class Codes: H04L 63/029 Firewall traversal, e.g. tunnelling or, creating pinholes
• CPC Class Codes: H04L 63/10 for controlling access to devices or network resources
• CPC Class Codes: H04L 63/101 Access control lists [ACL]
• CPC Class Codes: H04L 67/63 Routing a service request depending on the request content or context

Abstract

Techniques for determining which resource access requests are handled locally at a remote computer, and which resource access requests are routed or “redirected” through a virtual private network. One or more routing or “redirection” rules are downloaded from a redirection rule server to a remote computer. When the node of the virtual private network running on the remote computer receives a resource access request, it compares the identified resource with the rules. Based upon how the identified resource matches one or more rules, the node will determine whether the resource access request is redirected through the virtual private network or handled locally (e.g., retrieved locally from another network). A single set of redirection rules can be distributed to and employed by a variety of different virtual private network communication techniques.

Claims

1. A method of creating redirection rules for routing resource access requests from a computer to a network, the method comprising:

creating an inclusion redirection rule for at least one existing resource definition defining a resource;

receiving exclusion input with an exclusion resource definition defining at least one exclusion resource; and

creating an exclusion redirection rule for the at least one exclusion resource.

2. The method recited in claim 1, further comprising combining the inclusion redirection rule with the exclusion redirection rule into a redirection rule list.

3. The method recited in claim 1, wherein the existing resource definition is maintained by a policy server for controlling access to the resource defined in the at least one existing resource definition.

4. The method recited in claim 1, further comprising:

receiving input with a second resource definition; and

creating a second inclusion redirection rule for the second resource definition.

5. The method recited in claim 1, wherein the existing resource definition includes an Internet protocol (IP) address for the resource.

6. The method recited in claim 1, wherein the existing resource definition includes a name for the resource.

7. The method recited in claim 6, wherein the name is a domain name.

8. The method recited in claim 6, wherein the name is a host name.

9. The method recited in claim 1, wherein the existing resource definition includes a universal resource locator (URL) address for the resource.

10. The method recited in claim 1, wherein the existing resource definition includes an Internet protocol (IP) address for the resource.

11. The method recited in claim 1, wherein the exclusion resource definition includes a name for the exclusion resource.

12. The method recited in claim 11, wherein the name is a domain name.

13. The method recited in claim 11, wherein the name is a host name.

14. The method recited in claim 1, wherein the exclusion resource definition includes a universal resource locator (URL) address for the exclusion resource.

15. An apparatus for creating a redirection rule list, comprising:

a policy server that maintains a plurality of resource definitions, each resource definition defining a resource, and

a rule redirection server that stores an inclusion redirection rule for each resource in a redirection rule list.

16. The apparatus for creating a redirection rule list recited in claim 15, wherein

the policy server maintains at least one exclusion resource definition defining an exclusion resource, and

the rule redirection server stores an exclusion redirection rule for the exclusion resource in the redirection rule list.

17. The apparatus for creating a redirection rule list recited in claim 15, wherein the policy server receives input with at least one exclusion resource definition.

18. The apparatus for creating a redirection rule list recited in claim 15, wherein the rule redirection server provides the redirection rule list to at least one client in a virtual private network.

19. A method of routing resource access requests based upon a resource name, the method comprising

receiving an name service reply for a resource;

extracting a name for the resource from the name service reply;

determining if the resource name matches a redirection rule;

deriving routing information for the resource from the name service reply when the resource name matches a redirection rule; and

mapping the name against the derived routing information in a look aside table.

20. The method of routing resource access requests based upon a resource name recited in claim 19, further comprising:

receiving a resource access request that identifies a requested resource by name;

determining if the name of the requested resource is in the look aside table;

obtaining the routing information mapped to the name of the requested resource from the look aside table when the name of the requested resource is in the look aside table; and

routing the resource access request using the obtained routing information.

21. The method of routing resource access requests based upon a resource name recited in claim 20, further comprising routing the resource access request using the obtained routing information by providing the obtained routing information to a system routing table.

22. The method of routing resource access requests based upon the resource name recited in claim 19, wherein the name service reply is a domain name service reply or a WINS reply.