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1. 发明申请

WO2011079145A2 SYSTEMS AND METHODS FOR MIXED MODE HANDLING OF IPV6 AND IPV4 TRAFFIC BY A VIRTUAL SERVER 审中-公开
标题翻译：用于通过虚拟服务器混合模式处理IPV6和IPV4流量的系统和方法
公开(公告)号：WO2011079145A2
公开(公告)日：2011-06-30
申请号：PCT/US2010/061634
申请日：2010-12-21
申请人： CITRIX SYSTEMS, INC. , YENGALASETTI, Sreedhar , MUTHIAH, Manikam
发明人： YENGALASETTI, Sreedhar , MUTHIAH, Manikam
IPC分类号： H04L12/28 , H04L12/56
CPC分类号： H04L45/00 , G06F9/5044 , H04L29/06 , H04L29/12915 , H04L47/125 , H04L61/6059 , H04L67/1002 , H04W80/045
摘要： The present invention is directed towards systems and methods for mixed-mode load balancing by a virtual server in a network supporting a plurality of internet protocols. In various embodiments, a mixed-mode virtual server receives service requests based on two or more internet layer protocols. The mixed-mode virtual server is configured to detect an IP address type of the client issuing the service request, and identify the internet protocol of the service request based on the detected IP address type. The mixed-mode virtual server can then forward the request to a server supporting the identified internet protocol. In this manner, the mixed-mode virtual server can bind load balance servers supporting a plurality of internet protocols.
摘要翻译：本发明针对通过支持多种因特网协议的网络中的虚拟服务器进行混合模式负载平衡的系统和方法。在各种实施例中，混合模式虚拟服务器基于两个或更多互联网层协议来接收服务请求。混合模式虚拟服务器被配置为检测发布服务请求的客户端的IP地址类型，并且基于检测到的IP地址类型来识别服务请求的网际协议。混合模式虚拟服务器然后可以将该请求转发到支持所识别的互联网协议的服务器。以这种方式，混合模式虚拟服务器可以绑定支持多种互联网协议的负载均衡服务器。

2. 发明申请

WO2022018466A1 DETERMINING SERVER UTILIZATION USING UPPER BOUND VALUES 审中-公开
公开(公告)号：WO2022018466A1
公开(公告)日：2022-01-27
申请号：PCT/GR2020/000037
申请日：2020-07-22
申请人： CITRIX SYSTEMS, INC. , VARNAVAS, Andreas , TIWARI, Satyendra , MUTHIAH, Manikam , GEORGAKOPOULOS, Nikolaos
发明人： VARNAVAS, Andreas , TIWARI, Satyendra , MUTHIAH, Manikam , GEORGAKOPOULOS, Nikolaos
IPC分类号： G06F9/50 , G06F11/34 , H04L29/08
摘要： Described embodiments provide systems and methods for monitoring server utilization and reallocating resources using upper bound values. A device can determine a value indicative of an upper bound of a processing load of a server using data points detected for the processing load over a first range of time. The upper bound can correspond to a percentage of the processing load during the first range of time. The device can monitor, using the value, the processing load of the server over a second range of time. A determination can be made whether the value of the processing load is greater than a threshold during the second range of time. The device can generate an alert for the device responsive to a comparison of the value of the processing load to the threshold.

3. 发明申请

WO2010068462A1 SYSTEMS AND METHODS FOR APPLYING TRANSFORMATIONS TO IP ADDRESSES OBTAINED BY DOMAIN NAME SERVICE (DNS) 审中-公开
标题翻译：将域名服务（DNS）获取的IP地址进行转换的系统和方法
公开(公告)号：WO2010068462A1
公开(公告)日：2010-06-17
申请号：PCT/US2009/065786
申请日：2009-11-24
申请人： CITRIX SYSTEMS, INC. , DEGAONKAR, Sumedh , MUTHIAH, Manikam
发明人： DEGAONKAR, Sumedh , MUTHIAH, Manikam
IPC分类号： H04L29/12
CPC分类号： H04L45/74 , H04L29/12066 , H04L29/12339 , H04L29/12952 , H04L61/1511 , H04L61/2503 , H04L61/6077
摘要： Described herein are systems and methods for improving networked communication systems by transforming IP addresses. In particular, an intermediary device disposed in a network between a plurality of clients and a plurality of servers can receive a request for a service offered at a specified domain name. The appliance can also receive a DNS-resolved primary address for a server associated with the domain name, and transform the primary address to a secondary address for the server. The address transformation can be done by the intermediary to prevent service interruption between a client and server due, for example, to server maintenance.
摘要翻译：这里描述了通过转换IP地址来改进网络通信系统的系统和方法。特别地，设置在多个客户端和多个服务器之间的网络中的中间设备可以接收对以指定域名提供的服务的请求。设备还可以接收与域名关联的服务器的DNS解析的主地址，并将主地址转换为服务器的辅助地址。地址转换可以由中间人完成，以防止客户端与服务器之间的服务中断，例如服务器维护。

4. 发明申请

WO2010068457A1 SYSTEMS AND METHODS FOR HEALTH BASED SPILLOVER 审中-公开
标题翻译：基于健康的SPILLOVER的系统和方法
公开(公告)号：WO2010068457A1
公开(公告)日：2010-06-17
申请号：PCT/US2009/065775
申请日：2009-11-24
申请人： CITRIX SYSTEMS, INC. , DEGAONKAR, Sumedh , MUTHIAH, Manikam
发明人： DEGAONKAR, Sumedh , MUTHIAH, Manikam
IPC分类号： G06F11/00 , G06F11/20 , G06F11/34 , H04L29/08
CPC分类号： H04L43/08 , G06F11/2025 , G06F11/2028 , G06F11/3495 , H04L41/5012 , H04L43/0817 , H04L43/12 , H04L43/16 , H04L69/40
摘要： The present solution provides a spillover management technique for virtual servers of an appliance based on health. Using a health based spillover technique, a network appliance may direct requests to a backup or second virtual server upon determining that a predetermined percentage of services being load balanced are down. In this manner, the spillover will occur based on a user controlled determination of a level of services being down to the number of services enabled. Instead of waiting for a last service of a virtual server to be marked down to spillover to another virtual server, the spillover may occur based on a user specified percentage. For example, the appliance may spillover from one virtual server to another virtual server when the number of services marked down relative to the number of enabled services falls below a specified percentage.
摘要翻译：本解决方案为基于健康的设备的虚拟服务器提供了溢出管理技术。使用基于健康的溢出技术，网络设备可以在确定负载平衡的预定百分比的服务被关闭之后将请求定向到备份或第二虚拟服务器。以这种方式，溢出将基于用户控制的服务级别的确定下降到启用的服务数量而发生。不要等待要标记为虚拟服务器的最后一个服务来溢出到另一个虚拟服务器，而是可能会根据用户指定的百分比发生溢出。例如，当相对于启用服务数量标记的服务数量低于指定百分比时，设备可能会从一个虚拟服务器溢出到另一个虚拟服务器。

5. 发明申请

WO2010068465A2 SYSTEMS AND METHODS FOR MAINTAINING PERSISTENCE BY A BACKUP VIRTUAL SERVER 审中-公开
标题翻译：用于通过备份虚拟服务器维持持久性的系统和方法
公开(公告)号：WO2010068465A2
公开(公告)日：2010-06-17
申请号：PCT/US2009/065794
申请日：2009-11-24
申请人： CITRIX SYSTEMS. INC. , GANDHEWAR, Dinesh , MUTHIAH, Manikam
发明人： GANDHEWAR, Dinesh , MUTHIAH, Manikam
IPC分类号： H04L29/08
CPC分类号： H04L67/1008 , H04L67/1002 , H04L67/1014 , H04L67/1025 , H04L67/1029 , H04L67/1034 , H04L67/28 , H04L67/2814 , H04L67/2885 , H04L69/40
摘要： The present disclosure presents systems and methods for maintaining persistence of a backup virtual server on connections currently serviced by the backup virtual server. A virtual server operating on an intermediary network device and identified as a primary virtual server for a first connection may receive a request via the first connection. The intermediary device may forward the first request to a backup virtual server of the virtual server in response to identifying that the virtual server is unavailable. The intermediary device may later identify that the virtual server is available. The virtual server may establish a new connection responsive to receiving a connection request while the intermediary device may forward a second request received via the first connection to the backup virtual server instead of the virtual server responsive to identifying that the virtual server is configured not to preempt the backup virtual server from maintaining connections currently maintained by the backup virtual server.
摘要翻译：本公开提出了用于在由备份虚拟服务器当前服务的连接上维持备份虚拟服务器的持久性的系统和方法。在中间网络设备上运行并且被识别为用于第一连接的主虚拟服务器的虚拟服务器可以经由第一连接接收请求。响应于识别出虚拟服务器不可用，中间设备可以将第一请求转发给虚拟服务器的备份虚拟服务器。中间设备稍后可以识别出虚拟服务器可用。响应于接收到连接请求，虚拟服务器可以建立新的连接，而中间设备可以响应于识别出虚拟服务器被配置为不抢先而将经由第一连接接收到的第二请求转发到备份虚拟服务器而不是虚拟服务器备份虚拟服务器维护当前由备份虚拟服务器维护的连接。

6. 发明申请

WO2014186189A1 SYSTEM AND METHOD FOR REDUCING DENIAL OF SERVICE ATTACKS AGAINST DYNAMICALLY GENERATED NEXT SECURE RECORDS 审中-公开
标题翻译：用于减少对动态生成的下一个安全记录进行服务攻击的系统和方法
公开(公告)号：WO2014186189A1
公开(公告)日：2014-11-20
申请号：PCT/US2014/037125
申请日：2014-05-07
申请人： CITRIX SYSTEMS, INC.
发明人： MUTHIAH, Manikam
IPC分类号： H04L29/12 , H04L29/06 , H04L29/08
CPC分类号： G06F21/55 , H04L61/1511 , H04L61/6009 , H04L61/6013 , H04L63/10 , H04L63/1458 , H04L67/2804 , H04L67/2871
摘要： The present disclosure is directed to the reduction of denial of service, DoS, attacks against dynamically generated next secure, NSEC, records. A domain name system, DNS, proxy (602) prevents spoofed IP addresses by forcing clients (600) to transmit DNS queries via transmission control protocol, TCP, by replying (626) to a user datagram protocol, UDP, DNS request (620) with a blank or predetermined resource record with a truncation bit set to indicate that the record is too large to fit within a single UDP packet payload. Under the DNS specification, the client must re-transmit the DNS request via TCP. Upon receipt (634) of the retransmitted request via TCP, the DNS proxy generates (640) fictitious neighbor addresses and a signed NSEC record and transmits (642) the record to the client. Accordingly, the DNS proxy need not waste resources generating and signing records for requests from spoofed IP addresses via UDP.
摘要翻译：本公开旨在减少拒绝服务，DoS攻击动态生成的下一个安全的NSEC记录。域名系统（DNS）代理（602）通过强制客户端（600）通过传输控制协议（TCP）通过回复（626）到用户数据报协议UDP，DNS请求（620）来发送DNS查询来防止欺骗IP地址具有空白或预定的资源记录，其中截断位被设置以指示该记录太大以至于不能容纳在单个UDP分组有效载荷内。在DNS规范下，客户端必须通过TCP重新发送DNS请求。通过TCP接收（634）重发请求后，DNS代理生成（640）虚拟邻居地址和签名的NSEC记录，并将记录发送（642）给客户端。因此，DNS代理不需要通过UDP浪费来自欺骗IP地址的请求的资源生成和签名记录。

7. 发明申请

WO2021113106A1 SYSTEMS AND METHODS FOR PERSISTENCE ACROSS APPLICATIONS USING A CONTENT SWITCHING SERVER 审中-公开
公开(公告)号：WO2021113106A1
公开(公告)日：2021-06-10
申请号：PCT/US2020/061818
申请日：2020-11-23
申请人： CITRIX SYSTEMS, INC.
发明人： MUTHIAH, Manikam , VITTAL, Chiradeep , SN, Raghav , GHAI, Sanchita , SHIVANANDA, Vinay
IPC分类号： H04L29/08
摘要： Disclosed herein includes a system, a method, and a device for providing persistence across applications using a content switching server. A device can receive a first request from a client for a version of an application having different versions provided by one or more servers. The device can provide access to each version of the application via different load balancing virtual servers. A content switching virtual server of the device can select a load balancing virtual server to handle the first request for the version of the application. The content switching virtual server can generate a session identifier for a session between the client and the version of the application to persist the session with the selected load balancing virtual server for subsequent requests from the client for the version of the application.

8. 发明申请

WO2014186189A9 SYSTEM AND METHOD FOR REDUCING DENIAL OF SERVICE ATTACKS AGAINST DYNAMICALLY GENERATED NEXT SECURE RECORDS 审中-公开
公开(公告)号：WO2014186189A9
公开(公告)日：2014-11-20
申请号：PCT/US2014/037125
申请日：2014-05-07
申请人： CITRIX SYSTEMS, INC.
发明人： MUTHIAH, Manikam
IPC分类号： H04L29/12 , H04L29/06 , H04L29/08
摘要： The present disclosure is directed to the reduction of denial of service, DoS, attacks against dynamically generated next secure, NSEC, records. A domain name system, DNS, proxy (602) prevents spoofed IP addresses by forcing clients (600) to transmit DNS queries via transmission control protocol, TCP, by replying (626) to a user datagram protocol, UDP, DNS request (620) with a blank or predetermined resource record with a truncation bit set to indicate that the record is too large to fit within a single UDP packet payload. Under the DNS specification, the client must re-transmit the DNS request via TCP. Upon receipt (634) of the retransmitted request via TCP, the DNS proxy generates (640) fictitious neighbor addresses and a signed NSEC record and transmits (642) the record to the client. Accordingly, the DNS proxy need not waste resources generating and signing records for requests from spoofed IP addresses via UDP.

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