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  • Subject: RE: Hacker site featuring AS/400...
  • From: eric <eric@xxxxxxxxxx>
  • Date: Wed, 11 Nov 1998 09:20:22 -0800

This is a good sign.  It shows that John Carr has really helped to get the 
word out about the AS/400.  It used to be that the only AS/400 hacker 
information on the net was the default passwords that the AS/400 comes 
with.

Eric Kempter
CommAir Mechanical Services, Inc.


-----Original Message-----
From:   Jim Welsh [SMTP:jimwelsh@ix.netcom.com]
Sent:   Tuesday, November 10, 1998 7:34 PM
To:     MIDRANGE-L@midrange.com
Subject:        Hacker site featuring AS/400...

http://www.genocide2600.com/~tattooman/b4b0/b4b0-5/b4b0-5.txt

> Introduction to AS/400 Computing
> Part 1 - Very Basic Concepts
> tymat@b4b0.org
>
> I. Key Features of the AS/400
>
> AS/400 is a computer platform made by IBM that runs the OS/400 Operating
> System.  The three key features of the AS/400 are:
>
> 1) Integrated Applications - software components such as relational 
database
>    programs, security software, internet applications, and programming
>    environment are part of the Operating System.
> 2) High Availability - like most IBM computing systems (like AIX) the 
AS/400
>    is considered as a high availability system by which most major 
changes
>    to the system do not require an IPL (Initial Program Load or a 
reboot).
> 3) Multiprocessor - an AS/400 machine can have many different processors
>    separate from the system processor which is responsible for a
>    particular I/O device.  Figure 1.1 shows a typical AS/400 
configuration.
>
> Figure 1.1
>
>                      ____________________
>                      | System Processor |   // New models of the AS/400 
can have
>                      |__________________|   // up to 12 64bit processors
>                                |
>                                |
>                    ____________|_____________
>                    |    System Main Bus     |
>                    |________________________|
>                    /                        \
>                   /                          \
>              _____|___________        ________|________
>              | I/O Interface |        | I/O Interface |
>              |_______________|        |_______________|
>                   |                           |
>             ______|________           ________|______
>             | SPD I/O Bus |           | PCI I/O Bus |
>             |_____________|           |_____________|
>             /             \
>         Devices......    Integrated
>                          PC Server
>                          - Novell
>                          - Lotus Domino
>                          - Windows NT
>                          - PC TCP/IP Stack      // This is independent of
>                              - TCP/IP Firewall  // OS/400s own TCP/IP 
stack
>                              - Proxy Server     // and vice-versa.
>                              - Lotus Domino SMTP Mail
>
> Other key features that make the AS/400 an attractive platform to many
> business are:
>
> 4) Single Level Storage Technology - Programs work with objects and 
object
>    names so hardware is always accessed by name and not by its address.
> 5) Large Address Size - With a 64bit addressing space, the AS/400 can 
address
>    up to 18.4 quintillion bytes.
> 6) Fully Object Oriented - All system resources, such as data structures, 
are
>    packaged within an object.  This means that AS/400 instructions can
>    only work on what they are supposed to work on so data will never be
>    treated as executable code.
> 7) Internet Ready - New AS/400 systems have full internet capabilities 
which
>    allows AS/400 machines to act as web servers (with full SSL
>    capabilities).
> 8) Robust Programming Environment - OS/400 comes with several different
>    programming environments such as CL (Control Language), ILE, COBOL, 
RPG
>    III & IV, and Java
>
> II.  TCP/IP Connectivity
>
> The AS/400 supports many different TCP/IP application protocols such as 
FTP,
> SMTP, Telnet, and network printing.  The AS/400 has a complete 
implementation
> of the sockets API which are all integrated into OS/400.
>
> The AS/400 supports many different network interfaces ranging from token 
ring,
> ethernet, x.25, frame relay, fiber distributed digital interface, and
> serial.
>
> III. File Structures
>
> There are 10 different file structures which are divided into 5 main 
categories.
> Each file structure has a corresponding CRTxxxF command which is used to 
create
> these files.  Figure 3.1 is a chart which summarizes these file types.
>
> Figure 3.1
>
> File Type       Subtype         File Description                Create 
Command
>
> Database File   PF              Physical File                   CRTPF
>                 LF              Logical File                    CRTLF
> Source File     PF              Physical Source File            CRTSRCPF
> Device File     DSPF            Workstation Display File        CRTDSPF
>                 PRTF            Printer File                    CRTPRTF
>                 TAPF            Tape File                       CRTTAPF
>                 DKTF            Diskette File                   CRTDKTF
>                 ICFF            Intersystem Communications      CRTICFF
>                                 Function File
> DDM File        DDMF            Distributed Data Management     CRTDDMF
>                                 File
> Save File       SAVF            Save File                       CRTSAVF
>
>
> Ok, that's it for this issue.  From now on there will be an AS/400 
related
> article in every issue of B4B0 and each will depend on previous AS/400
> articles released in this zine.  The purpose of these beginner-level
> articles is to get the reader up to speed on AS/400 basics so in the near
> future I will be able to discuss an overview of AS/400 security and
> probably base these articles for more in-depth lectures on AS/400 
security
> and programming in the future.  It is quite sad but 99% of B4B0 readers
> have no clue about AS/400 and if I started discussing advanced AS/400 
topics
> it would only go to waste.
>
> Next issue we will tackle more about file structures and then I will 
start
> discussing more user-level related tasks such as maneuvering the OS/400
> menu system and customizing commands.
>

We might want to keep an eye on these guys... ;>
--
Jim
http://www.netcom.com/~jimwelsh/welcome/welcome.html
mailto:jimwelsh@ix.netcom.com


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