Patents by Inventor Saibal Adhya

Saibal Adhya has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Systems and methods for providing IIP address stickiness in an SSL VPN session failover environment
    Patent number: 9009327
    Abstract: The SSL VPN session failover solution of the appliance and/or client agent described herein provides an environment for handling IP address assignment and end point re-authorization upon failover. The appliances may be deployed to provide a session failover environment in which a second appliance is a backup to a first appliance when a failover condition is detected, such as failure in operation of the first appliance. The backup appliance takes over responsibility for SSL VPN sessions provided by the first appliance. In the failover environment, the first appliance propagates SSL VPN session information including user IP address assignment and end point authorization information to the backup appliance. The backup appliance maintains this information. Upon detection of failover of the first appliance, the backup appliance activates the transferred SSL VPN session and maintains the user assigned IP addresses. The backup appliance may also re-authorize the client for the transferred SSL VPN session.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: April 14, 2015
    Assignee: Citrix Systems, Inc.
    Inventors: Saibal Adhya, Akshat Choudhary, Shashi Nanjundaswamy, Sergey Verzunov, Arkesh Kumar, Amarnath Mullick
  • Systems and methods for authorizing a client in an SSL VPN session failover environment
    Patent number: 8132247
    Abstract: The SSL VPN session failover solution of the appliance and/or client agent described herein provides an environment for handling IP address assignment and end point re-authorization upon failover. The appliances may be deployed to provide a session failover environment in which a second appliance is a backup to a first appliance when a failover condition is detected, such as failure in operation of the first appliance. The backup appliance takes over responsibility for SSL VPN sessions provided by the first appliance. In the failover environment, the first appliance propagates SSL VPN session information including user IP address assignment and end point authorization information to the backup appliance. The backup appliance maintains this information. Upon detection of failover of the first appliance, the backup appliance activates the transferred SSL VPN session and maintains the user assigned IP addresses. The backup appliance may also re-authorize the client for the transferred SSL VPN session.
    Type: Grant
    Filed: August 3, 2007
    Date of Patent: March 6, 2012
    Assignee: Citrix Systems, Inc.
    Inventors: Saibal Adhya, Akshat Choudhary, Sergey Verzunov, Amarnath Mullick, Shashi Nanjundaswamy, Arkesh Kumar
  • Systems and Methods for Authorizing a Client in an SSL VPN Session Failover Environment
    Publication number: 20090037998
    Abstract: The SSL VPN session failover solution of the appliance and/or client agent described herein provides an environment for handling IP address assignment and end point re-authorization upon failover. The appliances may be deployed to provide a session failover environment in which a second appliance is a backup to a first appliance when a failover condition is detected, such as failure in operation of the first appliance. The backup appliance takes over responsibility for SSL VPN sessions provided by the first appliance. In the failover environment, the first appliance propagates SSL VPN session information including user IP address assignment and end point authorization information to the backup appliance. The backup appliance maintains this information. Upon detection of failover of the first appliance, the backup appliance activates the transferred SSL VPN session and maintains the user assigned IP addresses. The backup appliance may also re-authorize the client for the transferred SSL VPN session.
    Type: Application
    Filed: August 3, 2007
    Publication date: February 5, 2009
    Inventors: Saibal Adhya, Akshat Choudhary, Sergey Verzunov, Amarnath Mullick, Shashi Nanjundaswamy, Arkesh Kumar
  • Systems and Methods for Providing IIP Address Stickiness in an SSL VPN Session Failover Environment
    Publication number: 20090037763
    Abstract: The SSL VPN session failover solution of the appliance and/or client agent described herein provides an environment for handling IP address assignment and end point re-authorization upon failover. The appliances may be deployed to provide a session failover environment in which a second appliance is a backup to a first appliance when a failover condition is detected, such as failure in operation of the first appliance. The backup appliance takes over responsibility for SSL VPN sessions provided by the first appliance. In the failover environment, the first appliance propagates SSL VPN session information including user IP address assignment and end point authorization information to the backup appliance. The backup appliance maintains this information. Upon detection of failover of the first appliance, the backup appliance activates the transferred SSL VPN session and maintains the user assigned IP addresses. The backup appliance may also re-authorize the client for the transferred SSL VPN session.
    Type: Application
    Filed: August 3, 2007
    Publication date: February 5, 2009
    Inventors: Saibal Adhya, Akshat Choudhary, Shashi Nanjundaswamy, Sergey Verzunov, Arkesh Kumar, Amarnath Mullick