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The Freeworld ][.........301-668-7657
Digital Logic............305-395-6906
The Executive Inn........915-581-5146
OSUNY BBS................914-725-4060
-=*< Cosmos Kid >*=-
========================================
===== Phrack Magazine presents Phrack 16 =====
===== File 4 of 12 =====
Hacking the Global Telecommunications Network
Researched and written by: The Kurgan
Compiled on 10/5/87
Network Procedure Differences
The Global Telecommunications Network (GTN) is Citibanks's international data
network, which allows Citicorp customers and personnel to access Citibank's
worldwide computerized services.
Two different sign on procedures exist: Type A and Type B. All users, except
some in the U.S., must use Type B. (U.S. users: the number you dial into
and the Welcome Banner you receive determine what sign-on procedure to
follow.) Welcome banners are as follows:
TYPE A:
WELCOME TO CITIBANK. PLEASE SIGN ON.
XXXXXXXX
@
PASSWORD =
@
TYPE B:
PLEASE ENTER YOUR ID:-1->
PLEASE ENTER YOUR PASSWORD:-2->
CITICORP (CITY NAME). KEY GHELP FOR HELP.
XXX.XXX
PLEASE SELECT SERVICE REQUIRED.-3->
Type A User Commands
User commands are either instructions or information you send to the network
for it to follow. The commands available are listed below.
User Action: Purpose:
@ (CR) To put you in command mode (mode in which you can put
your currently active service on hold and ask the network
for information, or log-off the service). (NOTE: This
symbol also serves as the network prompt; see Type A
messages.)
BYE (CR) To leave service from command mode.
Continue (CR) To return to application from command mode (off hold)
D (CR) To leave service from command mode.
ID To be recognized as a user by the network (beginning of
sign on procedure), type ID, then a space and your
assigned network ID. (Usually 5 or 6 characters long)
Status (CR) To see a listing of network address (only from @
prompt). You need this address when "reporting a
problem."
Type A messages
The network displays a variety of messages on your screen which either require
a user command or provide you with information.
Screen shows: Explanation:
@ Network prompt -- request for Network ID.
BAD PASSWORD Network does not except your password.
<address> BUSY The address is busy, try back later.
WELCOME TO CITIBANK. Network welcome banner. Second line provides address
PLEASE SIGN ON. # to be used when reporting "problems."
XXX.XXX
<address> ILLEGAL You typed in an address that doesn't exist.
<address> CONNECTED Your connection has been established.
DISCONNECTED Your connect has been disconnected.
NOT CONNECTED You're not connected to any service at the time.
NUI REQUIRED Enter your network user ID.