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SLAC Remote Access and Citrix XPe

Detailed overview of SLAC's remote access and Citrix XPe system, including VPN, Citrix functionalities, server configurations, encryption protocols, communication mechanisms, and application access. Learn about the transition from MetaFrame to XPe.

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SLAC Remote Access and Citrix XPe

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  1. SLAC Remote Access and Citrix XPe Brian Scott SLAC May 2004

  2. Windows Remote Access Solutions • Citrix • Allows access to a full Windows desktop and/or various applications • VPN/PPTP • Provides encrypted tunnel between remote system and SLAC internal network • Remote Desktop Protocol • Unencrypted access to Windows XP system • Requires use of VPN before using RDP

  3. File Access • Citrix provides access to all internal resources to which you have permissions • VPN access available to central Windows file servers • No longer allowing access to Windows file sharing to desktops via VPN

  4. E-mail • Microsoft Outlook access available via several mechanisms • Citrix (full thick client access) • Outlook Web Access (OWA), new version coming with Exchange 2003 migration this summer • Old version https://www-mail.slac.stanford.edu • New version coming soon • VPN and use of Outlook thick client

  5. Citrix XPe • April 2004 - Finished rollout of Citrix XPe farm • Farm running Windows 2000 with Citrix XPe • Support for Windows Systems and Linux (private build to support Secure ICA over SSL) • 900+ accounts • May 2004 - Shutdown Citrix Metraframe 1.8 farm • Farm ran Windows NT TSE with Citrix Metaframe 1.8

  6. Secured Communication Protocols • 128-bit SSL encryption. • Initial communication between Web Portal servers (Citrix MetaFrame NFuse) & client. • Subsequent communication between Application servers (Citrix MetaFrame Presentation server) & client. • Citrix SSL Relay Service. • Server-to-server communication. • Citrix Secure ICA - RSA RC5 128-bit encryption. • ICA session between Application servers & client. • Enforceable to client as minimum requirement.

  7. Redundancy within Citrix Servers • 2 Citrix NFuse Web Portal servers. • http://slaccitrix1.slac.stanford.edu • http://slaccitrix2.slac.stanford.edu • 2 Independent Management Architecture (IMA) Citrix Control servers. • N+2 Citrix Presentation servers in excess of peak capacity in Silo-1 (General Apps). • N+2 Citrix Presentation servers in excess of peak capacity in Silo-2 (Restricted Apps).

  8. 2 Silo’s • Silo 1 • The purpose of the Silo1 servers is to provide access to the common set of applications to all SLAC Citrix users. • Silo 2 • The purpose of Silo2 is to provide metered access to applications with certain licensing restrictions. For example: Certain applications are only licensed to be run by members of certain SLAC departments. Other applications are only licensed to be executed by a limited number of concurrent users.

  9. Server Configuration • Web Portal Servers • The Web servers host the Web Interface for Citrix MetaFrame XP. The Web interface consists of Java objects and Web server-side scripts that reside on the web servers. • Citrix SSL Relay • The Citrix SSL Relay is a service that runs on the MetaFrame XP servers and secures communications between the Web portal servers, the IMA servers, the MetaFrame XP application servers and ICA client PCs. • IMA Servers (Data Collectors) • The data collectors manage server farm dynamic data and client enumeration/resolution. • MetaFrame XP server farm administrator permissions • Citrix MetaFrame XP product licenses • MetaFrame server configuration settings • Published application configuration settings • Application load balancing configuration settings • Printer management information settings • MetaFrame XP server farm policies • MetaFrame Resource Manager configuration settings • Citrix Installation Manager settings • MS SQL Server • Data store for IMA servers • WTS Licensing Server • The WTS Licensing service on the AD domain controllers is responsible for providing WTS licensing tokens for WTS clients (including ICA client PCs).

  10. CITRIXDEMO

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