Jason Kevin Preston

US Patent:

8024802, Sep 20, 2011

Filed:

Jul 30, 2008

Appl. No.:

12/182262

Inventors:

Jason D. Preston - Austin TX, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G06F 11/00

US Classification:

726 22, 726 23

Abstract:

Methods and systems are provided for using state ranges for processing regular expressions in intrusion-prevention systems. In an embodiment, in an intrusion-prevention system for examining network traffic and identifying therein the presence of signature data patterns, a state-transition table is provided. The state-transition table is representative of a predetermined data pattern, and includes states each having one or more egress events defining transitions to other states. A subject is received for evaluation for the presence of the predetermined data pattern. While using the state-transition table for said evaluation, the presence of a first egress event of a first state is detected in the subject, resulting in a transition from the first state to a second state. A second-state range in the subject is calculated, and the second-state range is searched for the presence of at least one of the second state's egress events.

US Patent:

8307440, Nov 6, 2012

Filed:

Jul 31, 2008

Appl. No.:

12/183394

Inventors:

Rodney S. Canion - West Lake Hills TX, US
Jason D. Preston - Austin TX, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

H04L 29/06

US Classification:

726 23

Abstract:

A system includes a plurality of deep packet inspection engines for performing deep packet inspection on packets in a network. The deep packet inspection engines share at least some state. One of the deep packet inspection engines is assigned responsibility for writing data to the shared state. For one of the deep packet inspection engines to write data to the shared state, the deep packet inspection write provides a write request to the assigned “writer” deep packet inspection engine, which queues the request on a write queue. The writer deep packet inspection engine may queue multiple write requests from multiple deep packet inspection engines. The writer deep packet inspection engine dequeues the write requests and processes them serially, thereby avoiding the need to manage contention using locks.

US Patent:

8347384, Jan 1, 2013

Filed:

Jul 29, 2008

Appl. No.:

12/181400

Inventors:

Jason D. Preston - Austin TX, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

H04L 29/06

US Classification:

726 23

Abstract:

Methods and systems are provided for using incremental operation for processing regular expressions in intrusion-prevention systems. In an embodiment, a state-transition table is provided, said table representative of a predetermined data pattern, and including states each having one or more egress events defining transitions to other states. A first portion of a subject is received, where the subject is to be evaluated for the presence of the predetermined data pattern. While using the state-transition table for said evaluation, a first state is transitioned into, after which it is determined that a set of restart information should be saved for the first state, said determination including identifying a tail to save from an end of the first portion of the subject. The restart information is saved, along with at least the identified tail.

US Patent:

8448249, May 21, 2013

Filed:

Jul 29, 2008

Appl. No.:

12/181511

Inventors:

Jason D. Preston - Austin TX, US

Assignee:

Hewlett-Packard Development Company, L.P. - Houston TX

International Classification:

G06F 12/14
G06F 15/177
G08B 23/00

US Classification:

726 24, 709223, 713187, 713188, 713189, 726 25

Abstract:

Methods and systems are provided for using lambda transitions for processing regular expressions in intrusion-prevention systems. In an embodiment, a state-transition table is provided, said table being representative of a predetermined data pattern, and including states having egress events defining transitions to other states. A subject is received for evaluation for the presence of the predetermined data pattern. While using the state-transition table for said evaluation, a first state is transitioned into, the first state having an egress event defining a transition to a second state, a state count corresponding to a number of times the first state has been transitioned into, a state-count threshold, and a state-count condition. After transitioning into the first state, the state count is incremented. Responsive to determining that the state-count condition is satisfied by comparing the incremented state count with the state-count threshold, the transition to the second state is taken.

US Patent:

20130114589, May 9, 2013

Filed:

Dec 28, 2012

Appl. No.:

13/729398

Inventors:

Jason D. Preston - Austin TX, US
Kenneth RYON - Leander TX, US

Assignee:

VOXPATH NETWORKS, INC - Austin TX

International Classification:

H04L 12/66

US Classification:

370352

Abstract:

A system and method for IP telephony are disclosed. The system includes an IP telephone (IPT) and a Service Gateway (SG). The SG receives an identifier, e.g., a vendor class identifier, included in a DHCP discover message from the IP telephone and determines if the identifier is valid. If so, the SG issues a DHCP offer comprising DHCP lease information to the IP telephone, including a range of port numbers assigned to the IP telephone based on the identifier, where the range of port numbers comprises ports which are not reserved for use by other IP protocols. The DHCP lease information includes information indicating operational software for the IP telephone which the IP telephone executes to enable IP communications. The SG mediates IP communications between the IP telephone and an IP device, where the IP telephone uses at least a subset of the range of port numbers to send or receive IP communications.

US Patent:

20170091235, Mar 30, 2017

Filed:

Apr 29, 2016

Appl. No.:

15/143339

Inventors:

- Sunnyvale CA, US
Kris Allen Meier - Cedar Park TX, US
Jason Dillard Preston - Austin TX, US
Derek William Beard - Austin TX, US

International Classification:

G06F 17/30

Abstract:

To leverage the attributes of object storage for applications/systems created to interface with a network files system, an object storage backed file system can accept the defined file system commands from the applications/systems and transform the file system commands into requests that target object storage. The file system is “backed” by object storage because attributes and content of file system entities are stored in objects. For instance, content data and metadata of a file are stored in objects in object storage. This object storage backed file system can be considered a bridge between a client perceived hierarchical file system namespace and a flat namespace of an object storage.

US Patent:

20170091296, Mar 30, 2017

Filed:

Sep 25, 2015

Appl. No.:

14/866793

Inventors:

- Sunnyvale CA, US
Guy Sirton - Delta, CA
Garret Lance Hayes - Austin TX, US
Jason Dillard Preston - Austin TX, US

International Classification:

G06F 17/30

Abstract:

To leverage the attributes of object storage for applications/systems created to interface with a network files system, an object storage backed file system can accept the defined file system commands from the applications/systems and transform the file system commands into requests that target object storage. The file system is “backed” by object storage because attributes and content of file system entities are stored in objects. For instance, content data and metadata of a file are stored in objects in object storage. This object storage backed file system can be considered a bridge between a client perceived hierarchical file system namespace and a flat namespace of an object storage.

US Patent:

20150066847, Mar 5, 2015

Filed:

Aug 27, 2013

Appl. No.:

14/011719

Inventors:

- Sunnyvale CA, US
Greg Althaus - Austin TX, US
Duen-Wen Hsiao - Austin TX, US
Jason Preston - Austin TX, US
Damon Fleury - Cedar Park TX, US

Assignee:

NetApp, Inc. - Sunnyvale CA

International Classification:

G06F 17/30

US Classification:

707613

Abstract:

A system for migrating data from a source file system to a destination file system while the source file system is in active use, in part by transitioning the client's use of the source file system to that of the destination file system without unmounting the client from the source file system