===== 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.
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
ILLEGAL You typed in an address that doesn't exist.
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. PASSWORD = Request for your assigned password. STILL CONNECTED You are still connected to the service you were using. ? Network doesn't understand your entry. Type B User Commands and Messages Since the Type B procedure is used with GTN dial-ups, it requires fewer commands to control the network. There is only 1 Type B command. Break plus (CR) allows you to retain connection to one service, and connect with another. Screen Shows: Explanation: CITICORP (CITY NAME). Network Welcome banner. Type in service address. PLEASE SELECT SERVICE COM Connection made. DER The port is closed out of order, or no open routes are available. DISCONNECTED You have disconnected from the service and the network. ERR Error in service selected. INV Error in system. MOM Wait, the connection is being made. NA Not authorized for this service. NC Circuits busy, try again. NP Check service address. OCC Service busy, try again. Sign-on Procedures: There are two types of sign on procedures. Type A and Type B. Type A: To log onto a system with type A logon procedure, the easiest way is through Telenet. Dial your local Telenet port. When you receive the "@" prompt, type in the Type-A service address (found later in the article) then follow the instructions from there on. Type-B: Dial the your GTN telephone #, then hit return twice. You will then see: "PLEASE ENTER YOUR ID:-1->" Type in a network ID number and hit return. You will then see "PLEASE ENTER YOUR PASSWORD:-2->" Type in Network Password and hit return. Finally you will see the "CITICORP (city name)" welcome banner, and it will ask you to select the service you wish to log onto. Type the address and hit return. (A list of addresses will be provided later) Trouble Shooting: If you should run into any problems, the Citicorp personnel will gladly help their "employees" with any questions. Just pretend you work for Citibank and they will give you a lot. This has been tried and tested. Many times, when you attempt to log on to a system and you make a mistake with the password, the system will give you a number to call for help. Call it and tell them that you forgot your pass or something. It usually works, since they don't expect people to be lying to them. If you have any questions about the network itself, call 305-975-5223. It is the Technical Operations Center (TOC) in Pompano, Florida. Dial-Ups: The following list of dial-ups is for North America. I have a list of others, but I don't think that they would be required by anyone. Remember: Dial-ups require Type-B log-on procedure. Type-A is available on systems accessible through Telenet. Canada Toronto 416-947-2992 (1200 Baud V.22 Modem Standard) U.S.A. Los Angeles 213-629-4025 (300/1200 Baud U.S.A. Modem Standard) Jersey City 201-798-8500 New York City 212-269-1274 212-809-1164 Service Addresses: The following is a VERY short list of just some of the 100's of service addresses. In a later issue I will publish a complete list. Application Name: Type-A Type-B CITIADVICE 2240001600 CADV CITIBANKING ATHENS 2240004000 :30 CITIBANKING PARIS 2240003300 :33 CITIBANKING TOKYO 2240008100 :81 CITICASH MANAGER INTERNATIONAL 1 (NAFG CORP) 2240001200 CCM1 INTERNATIONAL 7 (DFI/WELLS FARGO) 2240013700 CCM7 COMPMARK ON-LINE 2240002000 CS4 ECONOMIC WEEK ON-LINE 2240011100 FAME1 INFOPOOL/INFOTEXT 2240003800 IP EXAMPLE OF LOGON PROCEDURE: THE FOLLOWING IS THE BUFFERED TEXT OF A LOG-ON TO CITIBANKING PARIS THROUGH TELENET. CONNECT 1200 TELENET 216 13.41 TERMINAL=VT100 @2240003300 223 90331E CONNECTED ENTER TYPE NUMBER OR RETURN TYPE B IS BEEHIVE DM20 TYPE 1 IS DEC VT100 TYPE A IS DEC VT100 ADV VIDEO TYPE 5 IS DEC VT52 TYPE C IS CIFER 2684 TYPE 3 IS LSI ADM 3A TYPE L IS LSI ADM 31 TYPE I IS IBM 3101 TYPE H IS HP 2621 TYPE P IS PERKIN ELMER 1200 TYPE K IS PRINTER KEYBOARD TYPE M IS MAI BASIC 4 TYPE T IS TELEVIDEO 9XX TYPE V IS VOLKER CRAIG 4404 TYPE S IS SORD MICRO WITH CBMP RELEASE BSC9.5 - 06JUN85 FOR 300 BAUD KEY ! AND CARRIAGE RETURN CONFIG. K1.1-I11H-R-C-B128 ENTER TYPE NUMBER OR RETURN K CONNECTED TO CITIBANK PARIS - CBP1 ,PORT 5 Have fun with this info, and remember, technology will rule in the end.