Citrix Extranet 2.0Product Overview

Agenda

What is Citrix Extranet 2.0? Architecture System Requirements

Citrix Extranet Features Access Control Identification & Authentication Encryption On-line Registration Citrix Extranet Admin Event Logging

Citrix Extranet Advantages

Commonly Used Terms

What Is Citrix Extranet 2.0?

Citrix Extranet provides a virtual private network (VPN) which allows you to securely deploy the latest business-

critical applications to users around the world, via the Internet – all while maintaining the manageability,

scalability, reliability and control you’ve grown to expect from Citrix.

Citrix Extranet Architecture

Leverage your existing network design

Citrix Extranet System Specifications

Windows NT Microsoft Windows NT

Server operating system 4.0, service pack 5 or 6a

Pentium II processor at 350 MHz

2 or more network adapter cards

64 MB of RAM 10 MB of free hard disk

space

Sun SPARC Sun Solaris 2.6, 7, or 8 20 MB minimum of free hard

disk space All required software

packages 2 or more network adapter

cards

Client Specifications

All Users Internet access Connection to a network using TCP/IP protocol The Citrix Extranet Client software

PC Users Microsoft Windows 95 osr2, 95b, 98, 98 SE, or Windows

NT Workstation 4.0, with service pack 5 or 6a or Windows 2000 SP1(proxy mode only)

2 MB free hard disk space Microsoft Internet Explorer 4.0x, 5.0, or 5.01, or Netscape

Navigator 4.5, 4.5.1, 4.6, 4.61, 4.7, 4.71, 4.72, or 4.73

Client Specifications

Macintosh Users Apple or other Macintosh OS–compatible Power PC

computer 1 MB free disk space Macintosh OS Version 8.1 or later (8.5 or later

recommended) Open Transport 1.3 or later (2.0 or later recommended) Netscape Navigator 4.x or Microsoft Internet Explorer 4.x,

or 5.0

UNIX Users A computer with Sun SPARC Systems running Solaris

2.6 or later 5 MB minimum of free hard disk space A suitable UNIX Web browser (must support forms)

Client Specifications

Windows CE/PocketPC Users CE Devices

Handheld PC (SH3 and MIPS) Handheld PC Professional Edition (SH3, SH4, MIPS,

ARM, and StrongARM) Palm-size PC (SH3 and MIPS)

Citrix Extranet 2.0 Features

Citrix Extranet Features

Encryption

Access Control

EventLogging

On-Line Registration (OLR)

Citrix Extranet

Admin

Identification andAuthentication

Access Control

TCP-based access permissions are defined for individuals or groups

Access Control

Permissions are identified by host name/IP address and the port

TCP – FTP, Telnet, POP3, etc… Web – server and port

Access Control

User-based policy management ensures secure application access

Access Control

Access permissions are received: At the time the Citrix Extranet Client initiates At regular user-defined intervals

Permission sources: User Users’ group “All” users

*Assigning permissions to groups avoids unnecessary duplication and is more efficient than assigning permissions to individual users.

Access Control

Dynamic Configuration

1. Prompts user for Access Code

2. User’s authentication key(s) accessed

3. Citrix Extranet Client contacts every Citrix Extranet Server for which the user has an authentication key and requests the user’s current access permissions

5. User’s access permissions are dynamically updated at startup and at regular intervals as defined by the end user Citrix Extranet Server

w/Dynamic Configuration (DC) Server Or DC Server on a separate machine4. User’s TCP access permissions are read from

sgate.acl and their Web permissions from sweb.acl; the current permissions are then sent to Citrix Extranet Client

NOTE: The Dynamic Configuration Agent always resides on the Citrix Extranet Server

Identification and Authentication

Citrix Extranet Server is the final authority when authenticating session requests:

User authentication Access Management User and group additions

Identification and Authentication

Key exchange methods are flexible for the Administrator

Tokens FIPS token (FIPS 140-1

compliant) VCAT token RADIUS SecurID Entrust/Netrust

Physical Smart Cards MCOS MCOS-B STARCOS 2.1

Smart Card ReadersPCAT Smarty CHIPDRIVE external

PKI (X.509) Certificates

Baltimore Entrust Microsoft Netscape VeriSign

Identification and Authentication

Citrix Extranet uses two authentication factors Access code Token

URL request sent to Server

Identification and Authentication

The session is initiated

Each Client TCP connection uses a unique session key

Shared Secret Key is combination of 1/2 shared secret key generated by client & 1/2 shared secret key generated by server

Encryption

The ticket contents are encrypted Initialization Vector (IVEC) User ID Ticket time/TTL Encryption algorithm Session key Destination MD5

On-line Registration (OLR)

Automated registration of the Citrix Extranet Client is via the Internet

User registers IDs automatically

generated Flexible UID server

assignments

On-line Registration (OLR)

Seamless registration process

Shared Secret Key is combination of 1/2 shared secret key generated by client & 1/2 shared secret key generated by server

Citrix Extranet Admin

Manage individual or groups of servers and users

Assigns Web and TCP permissions

Configures OLR Web form

Specifies management levels

Utilizes database functions like sort, filter and find

Event Logging

Allows for easy troubleshooting by logging critical information

Session start/end User added/deleted User enabled/disabled User key changed Successful/ unsuccessful user login Server up/down

Citrix Extranet 2.0 Advantages

Citrix Extranet Advantages

Flexible system integration

Rapid deployment

Centralized management

Simplicity and ease of use

Cost-effectiveness

Flexible System Integration

Network Connections

Public Network LAN/WAN Corporate

Intranet/Extranet Internet

Client Support

Windows 95/98/NT/2000

Macintosh Solaris Linux Windows CE Windows PocketPC

Token Support

Hard Drive Floppy (FIPS 140-1 or

VCAT) Smart Card Netrust/Entrust/X.509

digital certificate SecurID Radius

MetaFrame servers

Citrix ExtranetInternet

Clients

VPN

Flexible System Integration

Allows ICA Protocol to securely pass through both ends of a connection

When ICA passes through the Client to the Server, Citrix Extranet proxy intercepts the calls

The Client believes the servers are on the same network

Citrix Extranet Client uses TCP traffic on port 443

Flexible System Integration

Export ready for use at any available strength encryption

Triple DES (168-bit) RC4 DES (56-bit)

*Embargoed countries are Cuba, Libya, North Korea, Syria, Sudan, Iran, Iraq

Rapid Deployment

Easy deployment and token enrollment of large user bases via On-line Registration (OLR)

Centralized Management

Powerful GUI allows for local or remote administrator management

Remotely using the Citrix Extranet Client Locally on a Windows NT platform

Ease of Use

Simple 2-step client activation Install Citrix Extranet client software Register online

221 1

Cost-effectiveness

Leverage existing systems

No costly leased lines or modem banks

Minimal client management and user support costs

Connect Business Securely

Permit secure online information exchange via the Internet

Mobile users Suppliers Business partners End-customers Branch and international offices

Citrix Extranet 2.0

Powerful

End-to-end security

Centralized management

Commonly Used Terms

3DES: Cipher that applies the DES cipher three times with either two or three different DES keys. The Citrix Extranet implementation uses three DES keys (2168 combinations).

Access Code: The secret code, similar to a PIN on an ATM card—required to unlock the authentication key stored on the user’s token each time the user accesses a secure service. This code, defined by the user during registration, must be at least four characters in length with a maximum of 16, and can be any combination of letters and numbers.

Access Control: Allowing or denying connections through the use of access permissions.

Access Permissions: The associations between users and connections, as defined by a User ID, group name, service (TCP or Web), or destination. Citrix Extranet access permissions can be either individual user permissions or group permissions.

Authentication: The process of determining the identity of a user attempting to access a system.

Commonly Used Terms

Authentication Key: The key is a 32-character hexadecimal key assigned to a user during installation by the registration server administrator, consisting of the numbers 0 to 9 and letters A to F.

The Citrix Extranet authentication system supports virtual smart cards and ISO-standard smart cards for both authentication and stored data. A user with a physical smart card must use a smart card reader connected to their PC. Virtual smart card information (FIPS or VCAT token) may be stored on either the PC hard drive or a removable (floppy) disk.

The user’s Citrix Extranet authentication key is stored on the smart card, whether physical or virtual. This information is shared with the Citrix Extranet Server, where it is stored in the Citrix Extranet Server’s user database.

Authentication Token: A portable device used for authenticating a user. Authentication tokens operate by challenge/response, time-based code sequences, or other techniques.

Commonly Used Terms

Authenticator: The name assigned to a Citrix Extranet Server through which users can access a particular service. This name can be up to 14 alphanumeric characters in length and it is recommended that it be a derivative of your Citrix Extranet Server hostname.

Domain Name: Identifies a ‘location’ on the Internet (e.g., citrix.com) that has been registered with the Internet Network Information Center (InterNIC). Currently the domain name is limited to 47 characters. Through the use of aliases, however, it is possible to accommodate longer names.

DES: Data Encryption Standard is a NIST-standard encryption algorithm for secure data protection. A binary number is used as an encryption key with 720 quadrillion possible combinations (256). The key is randomly generated for each session (TCP connection).

FIPS Token: (Virtual Smart Card or Soft Token) A software emulation of a hardware authentication token that is in compliance with the FIPS140–1 coding standards. It stores your private information (authentication key) in an single encrypted file, either on a floppy disk or on your hard drive. FIPS Token is the default authentication method.

Commonly Used Terms

OLR: Citrix Extranet provides On-Line Registration (OLR) services which you may wish to implement depending on your system configuration and the functional requirements of your organization.

RC4: Is a stream cipher developed by RSA Data Security, Inc. This variable key-size stream cipher uses byte-oriented operations to perform random permutations. The typical cipher period is greater than 10100. Since eight to sixteen machine operations are required per output byte, the cipher runs very quickly in software. It is commonly used for secure communications, such as encrypting secure web site traffic using the SSL protocol.

VCAT Token: Identical to the FIPS Token, except that it stores your private information (authentication key) in an encrypted file system, rather than a single file.

Virtual Private Network (VPN): A private network created over a public network (e.g., the Internet) by using encryption, where exclusive client and host communications can occur.