IBM OS-390 User Manual

OS/390 IBM

Security Server (RACF) Planning: Installation and Migration

GC28-1920-03

OS/390 IBM

Security Server (RACF) Planning: Installation and Migration

GC28-1920-03

Note

Before using this information and the product it supports, be sure to read the general information under “Notices” on page vii.

Fourth Edition, September 1997

This is a major revision of GC28-1920-02. This edition applies to Version 2 Release 4 of OS/390 (5647-A01) and to all subsequent releases and modifications until otherwise

indicated in new editions. Order publications through your IBM representative or the IBM branch office serving your locality. Publications are not stocked at the

address below. IBM welcomes your comments. A form for readers' comments may be provided at the back of this publication, or you may address

your comments to the following address:

International Business Machines Corporation Department 55JA, Mail Station P384 522 South Road Poughkeepsie, NY 12601-5400 United States of America

FAX (United States & Canada): 1+914+432-9405 FAX (Other Countries):

Your International Access Code +1+914+432-9405

IBMLink (United States customers only): KGNVMC(MHVRCFS) IBM Mail Exchange: USIB6TC9 at IBMMAIL Internet e-mail: mhvrcfs@vnet.ibm.com

World Wide Web: http://www.s390.ibm.com/os390 If you would like a reply, be sure to include your name, address, telephone number, or FAX number. Make sure to include the following in your comment or note:

 Title and order number of this book  Page number or topic related to your comment

When you send information to IBM, you grant IBM a nonexclusive right to use or distribute the information in any way it believes appropriate without incurring any obligation to you.

Note to U.S. Government Users — Documentation related to restricted rights — Use, duplication or disclosure is subject to restrictions set forth in GSA ADP Schedule Contract with IBM Corp.

Contents

Notices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

About This Book .................................... xi

Who Should Use This Book ............................... xi

How to Use This Book .................................. xi

Where to Find More Information ......................... xii

IBM Systems Center Publications ......................... xiii

Other Sources of Information ........................... xiv

To Request Copies of IBM Publications ..................... xv

Summary of Changes ................................ xvii

Chapter 1. Planning for Migration ......................... 1

Migration Planning Considerations ........................... 1

Installation Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Customization Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Administration Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Auditing Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Application Development Considerations ....................... 3

General User Considerations .............................. 3

Chapter 2. Release Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

New and Enhanced Support .............................. 5

RACF/DB2 External Security Module ........................ 5

Enhancements to Support for OpenEdition Services ............... 6

Run-Time Library Services .............................. 7

Password History Enhancements .......................... 7

Tivoli Management Environment (TME) 10 Global Enterprise Management

User Administration Service ............................ 8

Program Control by System ID ........................... 8

New FMID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

OW24966 Enhancements to TARGET Command ................ 9

Enable/Disable Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

OW26237 Enhancements of Global Access Checking ............. 10

Chapter 3. Summary of Changes to RACF Components for OS/390

Release 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Callable Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Class Descriptor Table (CDT) ............................ 12

Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Data Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Exits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Macros . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

New Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Changed Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Deleted Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

 Copyright IBM Corp. 1994, 1997 iii

SYS1.SAMPLIB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Publications Library . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Chapter 4. Planning Considerations . . . . . . . . . . . . . . . . . . . . . . . 21

Migration Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Migration Paths for OS/390 Release 4 Security Server (RACF) ......... 21

Hardware Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

OpenEdition MVS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Program Control by System ID .......................... 23

RELEASE=2.4 Keyword on Macros ....................... 23

Chapter 5. Installation Considerations . . . . . . . . . . . . . . . . . . . . . . 25

RACF Storage Considerations ............................ 25

Virtual Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Templates for RACF on OS/390 Release 4 ..................... 27

Chapter 6. Customization Considerations . . . . . . . . . . . . . . . . . . . 29

Customer Additions to the Router Table and the CDT .............. 29

RACF/DB2 External Security Module Customization ............... 29

Exit Processing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Chapter 7. Administration Considerations . . . . . . . . . . . . . . . . . . . 31

The TMEADMIN Class ................................. 31

Password History Changes .............................. 31

Program Control by System ID ............................ 31

Enhancements of Global Access Checking ..................... 32

Chapter 8. Auditing Considerations . . . . . . . . . . . . . . . . . . . . . . . 33

SMF Records . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Chapter 9. Application Development Considerations ............. 35

Programming Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

RELEASE=2.4 Keyword on Macros ......................... 35

FASTAUTH Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

Chapter 10. General User Considerations .................... 37

Password History Changes .............................. 37

Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

How to Get Your RACF CD ............................. 47

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

iv OS/390 V2R4.0 Security Server (RACF) Planning: Installation and Migration

Figures

1. New Callable Services ............................. 11

2. Changed Callable Services ........................... 12

3. New Classes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

4. Changes to RACF Commands ......................... 13

5. Changes to PSPI Data Areas ......................... 16

6. Changed Executable Macros .......................... 17

7. New Panels for RACF .............................. 19

8. Changed Panels for RACF ........................... 19

9. Change to SYS1.SAMPLIB ........................... 19

10. Changes to the RACF Publications Library .................. 20

11. RACF Estimated Storage Usage ....................... 25

12. Changes to SMF Records ........................... 33

 Copyright IBM Corp. 1994, 1997 v

vi OS/390 V2R4.0 Security Server (RACF) Planning: Installation and Migration

Notices

References in this publication to IBM products, programs, or services do not imply that IBM intends to make these available in all countries in which IBM operates.

Any reference to an IBM product, program, or service is not intended to state or imply that only IBM's product, program, or service may be used. A functionally equivalent product, program, or service which does not infringe on any of IBM's intellectual property rights may be used instead of the IBM product, program, or service. Evaluation and verification of operation in conjunction with other products, programs, or services, except those expressly designated by IBM, is the user's responsibility.

IBM may have patents or pending patent applications covering subject matter in this document. The furnishing of this document does not give you any license to these patents. You can send license inquiries, in writing, to:

IBM Director of Licensing

IBM Corporation

500 Columbus Avenue Thornwood, NY 10594

USA Licensees of this program who wish to have information about it for the purpose of

enabling: (i) the exchange of information between independently created programs and other programs (including this one) and (ii) the mutual use of the information which has been exchanged, should contact:

IBM Corporation Mail Station P300 522 South Road Poughkeepsie, NY 12601-5400 USA Attention: Information Request

Such information may be available, subject to appropriate terms and conditions, including in some cases, payment of a fee.

 Copyright IBM Corp. 1994, 1997 vii

viii OS/390 V2R4.0 Security Server (RACF) Planning: Installation and Migration

Trademarks

The following terms are trademarks of the IBM Corporation in the United States or other countries or both:

 AIX/6000  BookManager  CICS  CICS/ESA  DB2  DFSMS  FFST  FFST/MVS  IBM  IBMLink  IMS  Library Reader  MVS/ESA  MVS/XA  NetView  OpenEdition  OS/2  OS/390  Parallel Sysplex  RACF  RETAIN  S/390  SOMobjects  System/390  SystemView  TalkLink  VM/ESA  VM/XA

UNIX is a registered trademark in the United States and other countries licensed exclusively through X/Open Company Limited.

Windows is a trademark of Microsoft Corporation. Other company, product, and service names, which may be denoted by a double

asterisk (**), may be trademarks or service marks of others.

 Copyright IBM Corp. 1994, 1997 ix

x OS/390 V2R4.0 Security Server (RACF) Planning: Installation and Migration

About This Book

This book contains information about the Resource Access Control Facility (RACF), which is part of the OS/390 Security Server. The Security Server has two components:

 RACF

 OpenEdition DCE Security Server

For information about the OpenEdition DCE Security Server, see the publications related to that component.

This book provides information to guide you through the migration process from OS/390 Release 3 Security Server (RACF) or RACF to OS/390 Release 4 Security Server (RACF).

The purpose of this book is to ensure an orderly transition to a new RACF release. It is release prior to Security Server (RACF) Release 3. First-time RACF customers should read directory shipped with the product when they are ready to install the product.

not

intended for customers installing RACF for the first time or installing a

OS/390 Security Server (RACF) Introduction

and use the program

Who Should Use This Book

This book is intended for experienced system programmers responsible for migrating from OS/390 Release 3 Security Server (RACF) to OS/390 Release 4 Security Server (RACF). This book assumes you have knowledge of OS/390 Release 3 Security Server (RACF).

If you are migrating from a RACF 2.2, or earlier, or from an OS/390 Security Server release prior to OS/390 Release 3, you should also read previous versions of this book, as described in “Migration Paths for OS/390 Release 4 Security Server (RACF)” on page 21.

How to Use This Book

This book is organized in the following order:

 Chapter 1, “Planning for Migration” on page 1, provides information to help you

plan your installation's migration to the new release of RACF.

 Chapter 2, “Release Overview” on page 5, provides an overview of support in

the new release.

 Chapter 3, “Summary of Changes to RACF Components for OS/390 Release

4” on page 11, lists specific new and changed support for the new release.

 Chapter 4, “Planning Considerations” on page 21, describes high-level

migration considerations for customers upgrading to the new release of RACF

from previous levels of RACF.

 Chapter 5, “Installation Considerations” on page 25, highlights information

about installing the new release of RACF.

 Copyright IBM Corp. 1994, 1997 xi

 Chapter 6, “Customization Considerations” on page 29, highlights information

about customizing function to take advantage of new support after the new release of RACF is installed.

 Chapter 7, “Administration Considerations” on page 31, summarizes changes

to administration procedures for the new release of RACF.

 Chapter 8, “Auditing Considerations” on page 33, summarizes changes to

auditing procedures for the new release of RACF.

 Chapter 9, “Application Development Considerations” on page 35, identifies

changes in the new release of RACF that might require changes to an installation's existing programs.

 Chapter 10, “General User Considerations” on page 37, summarizes new

support that might affect general user procedures.

Where to Find More Information

Where necessary, this book references information in other books. For complete titles and order numbers for all products that are part of OS/390, see

Information Roadmap

OS/390

Softcopy Publications

The OS/390 Security Server (RACF) library is available on the following CD-ROMs. The CD-ROM collections include the IBM Library Reader, a program that enables customers to read the softcopy books.

 The

OS/390 Security Server (RACF) Information Package

This softcopy collection kit contains the OS/390 Security Server (RACF) library. It also contains the RACF/MVS Version 2 product libraries, the RACF/VM 1.10 product library, product books from the OS/390 and VM collections, International Technical Support Organization (ITSO) books, and Washington System Center (WSC) books that contain substantial amounts of information related to RACF. The kit does not contain any licensed publications. By using this CD-ROM, you have access to RACF-related information from IBM products such as OS/390, VM, CICS, and NetView without maintaining shelves of hardcopy documentation or handling multiple CD-ROMs. To get more information on the the advertisement at the back of the book.

OS/390 Collection Kit

This softcopy collection contains a set of OS/390 and related product books. This kit contains unlicensed books.

OS/390 Security Server (RACF) Information Package

, SK2T-6700

Online Library Omnibus Edition MVS Collection Kit,

This softcopy collection contains a set of key MVS and MVS-related product books. It also includes the RACF Version 2 product libraries.

Server (RACF) Messages and Codes

is also available as part of

Productivity Edition Messages and Codes Collection,

, SK2T-2180

, see

SK2T-0710

OS/390 Security

Online Library

SK2T-2068.

xii OS/390 V2R4.0 Security Server (RACF) Planning: Installation and Migration

RACF Courses

The following RACF classroom courses are also available:



Effective RACF Administration,



MVS/ESA RACF Security Topics,



Implementing RACF Security for CICS/ESA,

IBM provides a variety of educational offerings for RACF. For more information on classroom courses and other offerings, see your IBM representative,

Mainframe Training Solutions

(1-800-426-8322).

IBM Systems Center Publications

IBM systems centers produce “red” and “orange” books that can be helpful in setting up and using RACF.

These books have not been subjected to any formal review nor have they been checked for technical accuracy, but they represent current product understanding (at the time of their publication) and provide valuable information on a wide range of RACF topics. They are not shipped with RACF. You must order them separately. A selected list of these books follows:

H3927

H3918

H3992

IBM

, GR28-5467, or call 1-800-IBM-TEACH

| 



Systems Security Publications Bibliography,



Elements of Security: RACF Overview - Student Notes,



Elements of Security: RACF Installation - Student Notes,



Elements of Security: RACF Advanced Topics - Student Notes,



RACF Version 2 Release 2 Technical Presentation Guide,



RACF Version 2 Release 2 Installation and Implementation Guide,



Enhanced Auditing Using the RACF SMF Data Unload Utility,



RACF Macros and Exit Coding,



RACF Support for Open Systems Technical Presentation Guide,



DFSMS and RACF Usage Considerations,



Introduction to System and Network Security: Considerations, Options, and

Techniques,



Network Security Involving the NetView Family of Products,



System/390 MVS Sysplex Hardware and Software Migration,



Secured Single Signon in a Client/Server Environment,



Tutorial: Options for Tuning RACF,

GG24-3451

GG24-3984

GG22-9396

OS/390 Security Server Audit Tool and Report Application

G320-9279

GG24-3970

GG24-3971

GG24-3972

GG24-2539

SG24-4580

GG24-4453

GG26-2005

GG24-3378

GG24-3524

GC28-1210

GG24-4282

, SG24-4820

Other books are available, but they are not included in this list, either because the information they present has been incorporated into IBM product manuals, or because their technical content is outdated.

About This Book xiii

Other Sources of Information

IBM provides customer-accessible discussion areas where RACF may be discussed by customer and IBM participants. Other information is available through the Internet.

IBM Discussion Areas

Two discussion areas provided by IBM are the MVSRACF discussion and the SECURITY discussion.

 MVSRACF

MVSRACF is available to customers through IBM's TalkLink offering. To access MVSRACF from TalkLink:

1. Select S390 (the S/390 Developers' Association).

2. Use the fastpath keyword: MVSRACF.

 SECURITY

SECURITY is available to customers through IBM's DialIBM offering, which may be known by other names in various countries. To access SECURITY:

1. Use the CONFER fastpath option.

2. Select the SECURITY CFORUM.

Contact your IBM representative for information on TalkLink, DialIBM, or equivalent offerings for your country and for more information on the availability of the MVSRACF and SECURITY discussions.

Internet Sources

The following resources are available through the Internet:

 RACF home page

You can visit the RACF home page on the World Wide Web using this address:

http://www.s39ð.ibm.com/products/racf/racfhp.html

http://www.s39ð.ibm.com/racf

 RACF-L discussion list

Customers and IBM participants may also discuss RACF on the RACF-L discussion list. RACF-L is not operated or sponsored by IBM; it is run by the University of Georgia.

To subscribe to the RACF-L discussion, so you can receive postings, send a note to:

listserv@uga.cc.uga.edu

Include the following line in the body of the note, substituting your first name and last name as indicated:

subscribe racf-l first_name last_name

To post a question or response to RACF-L, send a note to:

racf-l@uga.cc.uga.edu

Include an appropriate Subject: line.

 Sample code

xiv OS/390 V2R4.0 Security Server (RACF) Planning: Installation and Migration

You can get sample code, internally-developed tools, and exits to help you use

RACF. All this code works in our environment, at the time we make it available,

but is not officially supported. Each tool or sample has a README file that

describes the tool or sample and any restrictions on its use.

The simplest way to reach this code is through the RACF home page. From the

home page, click on System/390 FTP Servers under the topic, “RACF Sample

Materials.”

The code is also available from lscftp.pok.ibm.com through anonymous ftp.

To get access:

1. Log in as user anonymous.

2. Change the directory (cd) to /pub/racf/mvs to find the subdirectories that contain the sample code. We'll post an announcement on RACF-L, MVSRACF, and SECURITY CFORUM whenever we add anything.

Restrictions

Because the sample code and tools are not officially supported,

 There are no guaranteed enhancements.  No APARs can be accepted.

The name and availability of the ftp server may change in the future. We'll post an announcement on RACF-L, MVSRACF, and SECURITY CFORUM if this happens.

However, even with these restrictions, it should be useful for you to have access to this code.

To Request Copies of IBM Publications

Direct your request for copies of any IBM publication to your IBM representative or to the IBM branch office serving your locality.

There is also a toll-free customer support number (1-800-879-2755) available Monday through Friday from 6:30 a.m. through 5:00 p.m. Mountain Time. You can use this number to:

 Order or inquire about IBM publications  Resolve any software manufacturing or delivery concerns  Activate the Program Reorder Form to provide faster and more convenient

ordering of software updates

See the advertisement at the back of the book for information about the

Security Server (RACF) Information Package.

OS/390

About This Book xv

xvi OS/390 V2R4.0 Security Server (RACF) Planning: Installation and Migration

Summary of Changes

| Summary of Changes | for GC28-1920-03 | OS/390 Version 2 Release 4

| This book contains primarily new information for OS/390 Version 2 Release 4 | Security Server (RACF). When any information appeared in an earlier release, the | information that is new is indicated by a vertical line to the left of the change.

Summary of Changes for GC28-1920-02 OS/390 Release 3

This book contains new information for OS/390 Release 3 Security Server (RACF).

Summary of Changes for GC28-1920-01 OS/390 Release 2

This book contains new information for OS/390 Release 2 Security Server (RACF).

Summary of Changes for GC28-1920-00 OS/390 Release 1

This book contains information previously presented in

and Migration

This book includes terminology, maintenance, and editorial changes.

, GC23-3736, which supports RACF Version 2 Release 2.

RACF Planning: Installation

xviii OS/390 V2R4.0 Security Server (RACF) Planning: Installation and Migration

Chapter 1. Planning for Migration

This chapter provides information to help you plan your installation's migration to the new release of OS/390 Security Server (RACF). Before attempting to migrate, you should define a plan to ensure a smooth and orderly transition. A well thought-out and documented migration plan can help minimize any interruption of service. Your migration plan should address such topics as:

 Identifying which required and optional products are needed  Evaluating new and changed functions  Evaluating how incompatibilities affect your installation  Defining necessary changes to:

– Installation-written code – Operational procedures – Application programs

– Other related products

 Defining education requirements for operators and end users  Preparing your staff and end users for migration, if necessary  Acquiring and installing the latest service level of RACF for maintenance

The content and extent of a migration plan can vary significantly from installation to installation. To successfully migrate to a new release of RACF, you should start by installing and stabilizing the new RACF release without activating the new functions provided. Installing the new RACF release without initially exploiting new functions allows you to maintain a stable RACF environment. The program directory shipped with the new OS/390 release gives detailed information about the correct software required for installation.

When defining your installation's migration plan, you should consider the following:  Migration

 Installation  Customization  Administration  Auditing  Operation  Application development  General users

Migration Planning Considerations

Installations planning to migrate to a new release of RACF must consider high-level support requirements such as machine and programming restrictions, migration paths, and program compatibility.

For more information, see Chapter 4, “Planning Considerations” on page 21.

Installation Considerations

Before installing a new release of RACF, you must determine what updates are needed for IBM-supplied products, system libraries, and non-IBM products. (Procedures for installing RACF are described in the program directory shipped with OS/390, not in this book.)

Be sure you include the following steps when planning your pre-installation activities:

 Obtain and install any required program temporary fixes (PTFs) or updated

versions of the operating system. Call the IBM Software Support Center to obtain the preventive service planning

(PSP) upgrade for RACF. This provides the most current information on PTFs for RACF. Have RETAIN checked again just before testing RACF. Information for requesting the PSP upgrade can be found in the program directory. Although the program directory contains a list of the required PTFs, the most current information is available from the support center.

 Contact programmers responsible for updating programs.

Verify that your installation's programs will continue to run, and, if necessary, make changes to ensure compatibility with the new release.

For more information, see Chapter 5, “Installation Considerations” on page 25.

Customization Considerations

In order for RACF to meet the specific requirements of your installation, you can customize function to take advantage of new support after the product is installed. For example, you can tailor RACF through the use of installation exit routines, class descriptor table (CDT) support, or options to improve performance. This book lists changes to RACF that might require the installation to tailor the product, either to ensure that RACF runs as before or to accommodate new security controls that an installation requires.

For more information, see Chapter 6, “Customization Considerations” on page 29.

Administration Considerations

Security administrators must be aware of how changes introduced by a new product release can affect an installation's data processing resources. Changes to real and virtual storage requirements, performance, security, and integrity are of interest to security administrators or to system programmers who are responsible for making decisions about the computing system resources used with a program.

For more information, see Chapter 7, “Administration Considerations” on page 31.

2 OS/390 V2R4.0 Security Server (RACF) Planning: Installation and Migration

Auditing Considerations

Auditors who are responsible for ensuring proper access control and accountability for their installation are interested in changes to security options, audit records, and report generation utilities.

For more information, see Chapter 8, “Auditing Considerations” on page 33.

Application Development Considerations

Application development programmers must be aware of new functions introduced in a new release of RACF. To implement a new function, the application development personnel should read this book and the following books:



OS/390 Security Server External Security Interface (RACROUTE) Macro Reference



OS/390 Security Server (RACF) Data Areas



OS/390 Security Server (RACF) Macros and Interfaces

To ensure that existing programs run as before, the application programmers should be aware of any changes in data areas and processing requirements. This book provides an overview of the changes that might affect existing application programs.

For more information, see Chapter 9, “Application Development Considerations” on page 35.

General User Considerations

RACF general users use a RACF-protected system to:

 Log on to the system  Access resources on the system  Protect their own resources and any group resources to which they have

administrative authority

This book provides an overview of the changes that might affect existing procedures for general users. For more information, see Chapter 10, “General User Considerations” on page 37.

Chapter 1. Planning for Migration 3

+ 53 hidden pages

IBM OS-390 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual