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SLAC Remote Access and Citrix XPe. Brian Scott SLAC May 2004. 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 - PowerPoint PPT Presentation
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SLAC Remote Access and Citrix XPe
Brian ScottSLACMay 2004
Windows Remote Access SolutionsCitrix
– Allows access to a full Windows desktop and/or various applications
VPN/PPTP– Provides encrypted tunnel between remote system
and SLAC internal networkRemote Desktop Protocol
– Unencrypted access to Windows XP systemRequires use of VPN before using RDP
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
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
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
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.
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).
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.
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).
ICA Client
WebBrowser
Cl ient PC
4
B o r d e rR o u t e r
Internet SLAC LAN
SLAC Citrix XP Server Farm
3
1
3
1
NFuse Web Serverwtsxp porta l 1
NFu se Web Serverwtsxp porta l 2
IMA Serverslacw tsima02
2
2
slacwtsxp15slacwtsxp03slacwtsxp02slacwtsxp01
2
2
. . .
101 2 3
IMA Data StoreSQL Server
MSSQL1
TS Licensing ServerAD DCs
IMA Serverslacw tsima01
MetaFrame X P App l icat io n Servers
Updated 11/26/03
. . .
User Home Directories &Roaming Profile Storage
ZWINSANs
SLAC WTS XP Server Farm -- Two-Silo, Two-Tier Model
Updated: 11-21-03
Separate images forrapid recovery
Web Portal
WTSXPPORTAL1 WTSXPPORTAL2
Separate images forrapid recovery
Farm Control Servers
SLACWTSIMA01 SLACWTSIMA02
WTS XP Server FarmData Store Database
SQL 2000Database Server
MSSQL1
Silo-1: User Desktop Sessions and Common Applications
Silo1 ReleaseCandidate image:
S1Vn+1
Silo1Staging Server
SLACWTSXP01
Silo1production image: S1_Vn
One load-balanced published desktop for all SLAC WTS users
SLACWTSXP02 SLACWTSXP03 SLACWTSXP04 SLACWTSXP05 SLACWTSXP06 SLACWTSXP07 SLACWTSXP08
Silo-2: Restricted & Metered Applications
Silo2 production image: S2_Vn
Access controlles seamless apps only,No desktops published from Silo2
SLACWTSXP10 SLACWTSXP11 SLACWTSXP12SLACWTSXP09
Silo2 ReleaseCandidate image:
S2Vn+1
CITRIX DEMO