Zscaler, Inc.

Citrix Systems, Inc.

Citrix Application Networking, LLC

Shashidhara Mysore Nanjundaswamy

Kailash Kailash

Amarnath Mullick

Jose Raphel

Jose Kolenchery Rappel

Ajay Soni

Saravana Annamalaisami

Arkesh Kumar

Junxiao He

Prabakar Sundarrajan

Krishna Khanal

Meghashree Iyengar

Sandhya Gopinath

Mahesh Mylarappa

Ashwin Jagadish

A distributed security system includes a plurality of content processing nodes that are located external to a network edge of an enterprise and located external from one of a computer device and a mobile device associated with a user, and a content processing node is configured to monitor a content item that is sent from or requested by the external system; classify the content item via a plurality of data inspection engines that utilize policy data and threat data; and one of distribute the content item, preclude distribution of the content item, allow distribution of the content item after a cleaning process, or perform threat detection on the content item, based on classification by the plurality of data inspection engines; and an authority node communicatively coupled to the plurality of content processing nodes and configured to provide the policy data and the threat data for threat classification.

Distributed cloud-based security systems and methods

A distributed security method is implemented in a processing node of a distributed security system comprising one or more processing nodes and one or more authority nodes, wherein the distributed security system is located external to a network edge of an enterprise and external from one of a computer device and a mobile device associated with a user. The distributed security method includes monitoring a content item sent from or requested by an external system which is external from a network edge of the external system; and responsive to a security policy associated with the external system, performing one of allowing the content item through the processing node; precluding the content item at the processing node; and threat detecting the content item at the processing node and one of allowing or precluding the content item based on the threat detecting.

A distributed security method is implemented in a processing node of a distributed security system comprising one or more processing nodes and one or more authority nodes, wherein the distributed security system is located external to a network edge of an enterprise and external from one of a computer device and a mobile device associated with a user. The distributed security method includes obtaining security policy data associated with the user and the enterprise from an authority node; monitoring data communications between the user, the enterprise, and the Internet in a processing node; and controlling the data communications between the user, the enterprise, and the Internet based on the monitoring to provide security measures between the user, the enterprise, and the Internet.

The present disclosure is directed towards methods and systems for caching packet steering sessions for steering data packets between intermediary devices of a cluster of intermediary devices intermediary to a client and a plurality of servers. A first intermediary device receives a first data packet and determines, from a hash of a tuple of the first packet, a second intermediary device to which to steer the first packet. The first device stores, to a session for storing packet steering information, the identity of the second device and the tuple. The first device receives a second packet having a corresponding tuple that matches the tuple of the first packet and determines, based on a lookup for the session using the tuple of the second packet, that the second device is the intermediary device to which to steer the second packet. The first device steers the second packet to the second device.

Systems and methods to cache packet steering decisions for a cluster of load balancers

The present disclosure is directed generally to systems and methods for changing an application layer transaction timeout to prevent Denial of Service attacks. A device intermediary to a client and a server may receive, via a transport layer connection between the device and the client, a packet of an application layer transaction. The device may increment an attack counter for the transport layer connection by a first predetermined amount responsive to a size of the packet being less than a predetermined fraction of a maximum segment size for the transport layer connection. The device may increment the attack counter by a second predetermined amount responsive to an inter-packet-delay between the packet and a previous packet being more than a predetermined multiplier of a round trip time. The device may change a timeout for the application layer transaction responsive to comparing the attack counter to a predetermined threshold.

Systems and methods for HTTP-body DoS attack prevention with adaptive timeout

Systems, methods and apparatus for a distributed security that provides authentication and authorization management. The system can include a source processor that is used to identify the source associated with a request for authentication or authorization. The source processor can maintain the initial source associated with the request through the use of an association token. The associate token can be transmitted with each subsequent request that includes authentication or authorization data. The source processor can use the associate token to verify that the source associated with the initial request is the same as the source associated with subsequent authentication and authorization requests.

HTTP authentication and authorization management

Systems and methods for HTTP-Body DoS attack prevention with adaptive timeout

Systems, methods and apparatus for a distributed security that provides authentication and authorization management. The system can include an epoch manager that is used to generate authentication and authorization data that remain valid only for an epoch. The epoch manager can generate an epoch key pair that can be used to encrypt and decrypt the authentication and authorization data during the epoch that the key is valid. The epoch manager can also associate the contents of the data with the epoch in which it was created, so that at decrypting the epoch that the data was generated in can be identified.

Systems, methods and apparatus for a distributed security that provides authentication and authorization management. The system can include an epoch processor that is used to validate authentication and authorization data that is valid only for an epoch. The epoch processor can maintain a public key that can be used to decrypt the authentication and authorization data during the epoch that the key is valid. The epoch processor can receive a new public key during each epoch. The epoch processor can also determine if the authentication or authorization data was fraudulently generated based on the contents of the data, and verifying whether the data is valid for the epoch in which it was decrypted.

A system and method for establishing a virtual private network (VPN) between a client and a private data communication network. An encrypted data communication session, such as a Secure Sockets Layer (SSL) data communication session, is established between a gateway and the client over a public data communication network. The gateway then sends a programming component to the client for automatic installation and execution thereon. The programming component operates to intercept communications from client applications destined for resources on the private data communication network and to send the intercepted communications to the gateway via the encrypted data communication session instead of to the resources on the private data communication network.

System and method for establishing a virtual private network

Systems, methods and apparatus for a distributed security that provides authentication and authorization management. The system can include a state manager that is used to identify and maintain the source associated with a client browser that submits requests to the state manager. The state manager can allow requests that are authorized and request authorization for requests that are not. The state manager can maintain the states associated with each domain to reduce the number of transaction needed to authenticate and/or authorize subsequent requests to the same domain or to different domains.

A system and method for establishing a virtual private network (VPN) between a client and a private data communication network. An encrypted data communication session, such as a&#x2014;Secure Sockets Layer (SSL) data communication session, is established between a gateway and the client over a public data communication network. The gateway then sends a programming component to the client for automatic installation and execution thereon. The programming component operates to intercept communications from client applications destined for resources on the private data communication network and to send the intercepted communications to the gateway via the encrypted data communication session instead of to the resources on the private data communication network.

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Bengaluru, India

Shashidhara Mysore Nanjundaswamy