Multitech ProxyServer MTPSR1-100 User manual

Proxy
User Guide
Model MTPSR1-100

User Guide
82083700 RevisionA
ProxyServer (Model No MTPSR1-100)
All rights reserved. Copyright © 1998, by Multi-Tech Systems, Inc.
This publication may not be reproduced, in whole or in part, without prior expressed written permission from
Multi-Tech Systems, Inc. Multi-Tech Systems, Inc. makes no representations or warranties with respect to
the contents hereof and specifically disclaims any implied warranties of merchantability or fitness for any
particular purpose. Furthermore, Multi-Tech Systems, Inc. reserves the right to revise this publication and to
make changes from time to time in the content hereof without obligation of Multi-Tech Systems, Inc. to notify
any person or organization of such revisions or changes.
Record of Revisions
Revision Description
A Manual released.All pages at revisionA.
(6/1/98)
Patents
This Product is covered by one or more of the following U.S. Patent Numbers: 5.301.274; 5.309.562;
5.355.365; 5.355.653; 5.452.289; 5.453.986. Other Patents Pending.
TRADEMARK
The Multi-Tech logo is a trademark of Multi-Tech Systems, Inc.
Windows is a registered trademark of Microsoft.
Multi-Tech Systems, Inc.
2205 Woodale Drive
Mounds View, Minnesota 55112
[phone] or [phone]
Fax [phone]
Tech Support [phone]
BBS [phone] or [phone]
InternetAddress: http://www.multitech.com
Fax-Back [phone]

iii
Contents
Chapter 1 - Introduction and Description
Introduction ................................................................................................................................................ 5
The ProxyServer Utilities............................................................................................................................ 5
ProxyServer Features and Benefits ........................................................................................................... 6
Some ProxyServer FAQs........................................................................................................................... 6
Chapter 2 - ProxyServer Wizard
Introduction ................................................................................................................................................ 7
The ProxyServer Wizard ............................................................................................................................ 8
Step 1: Select the Device you Wish to Configure ................................................................................ 8
Step 2: Set the Device’s IPAddress and Name................................................................................... 8
Step 3: Input your ISP Information for InternetAccess ........................................................................ 9
Step 4: Input your ISP’s DNS Server IPAddress .............................................................................. 10
Step 5: Select Modem and Set Baudrate...........................................................................................10
Step 6: Verify the Setup Configuration................................................................................................11
Final ProxyServer Wizard Notes .............................................................................................................. 12
Chapter 3 - ProxyServer Manager
Introduction .............................................................................................................................................. 13
Running the ProxyServer Manager from Your Desktop ........................................................................... 13
General Settings ...................................................................................................................................... 14
Server IP Address.............................................................................................................................. 14
Server Subnet Mask .......................................................................................................................... 14
External (Port) IPAddress ................................................................................................................. 14
DNS Server IP Address(s) ................................................................................................................. 14
Allow connection to be established by dial-in .................................................................................... 14
CallbackTelephone Number .............................................................................................................. 15
Modem Settings ....................................................................................................................................... 16
Baudrate ............................................................................................................................................ 16
Select Modem and Modem String Setting ......................................................................................... 16
Enable Login Script............................................................................................................................ 17
Writing a Login script................................................................................................................................ 18
StepA) Learn the ProxyServer Login Script Commands Available to you......................................... 18
Step B) Get Login Script Information ................................................................................................. 19
Step C) Make your login Script .......................................................................................................... 20
Dialup/Hangup Settings............................................................................................................................ 22
Individual Port Options....................................................................................................................... 22
DHCP Server ........................................................................................................................................... 23
DHCP Function .................................................................................................................................. 23
IPAddress Pool ................................................................................................................................. 23
IPAddress Mapping Reservation....................................................................................................... 23
Routing Table ........................................................................................................................................... 24
What is the purpose of the routing table? .......................................................................................... 24
Virtual Server Mapping............................................................................................................................. 26
Virtual Server Mapping Example (Web or other Server).................................................................... 26
Client Filter Settings ................................................................................................................................. 27
Server Name and Password .................................................................................................................... 27
Save Settings to File ................................................................................................................................ 28
Load Settings ........................................................................................................................................... 28
Upgrade Firmware ................................................................................................................................... 29
General Diagnostic................................................................................................................................... 29

iv
Chapter 4 - ProxyServer Monitor
ProxyServer Monitor ................................................................................................................................ 31
Test Connection ................................................................................................................................. 32
Event Messages ................................................................................................................................ 32
Terminate Connection ........................................................................................................................ 32
Save to File........................................................................................................................................ 32
TCP/IP Tab ........................................................................................................................................ 33
Connection Time Tab ......................................................................................................................... 33
Status Tab.......................................................................................................................................... 34
Chapter 5 - ProxyServer Clients
Setting Up ProxyServer Clients................................................................................................................ 35
Step 1 - Install TCP/IP Protocol on each ProxyServer Client PC ...................................................... 35
Step 2 - Assign IP Address to Each ProxyServer Client .................................................................... 37
Step 3 - Set InternetApplications to Connect Through LAN .............................................................. 39
Step 4 - Important Notes.................................................................................................................... 40
Chapter 6 - Troubleshooting
Tools for Your ProxyServer....................................................................................................................... 41
Tool A - ProxyServer Monitor ............................................................................................................. 41
Tool B - PING..................................................................................................................................... 41
Tool C - WINIPCFG and IPCONFIG ..................................................................................................42
Tool D - TRACERT............................................................................................................................. 42
Troubleshooting Time ............................................................................................................................... 43
Chapter 7 - Warranty, Service and Technical Support
Introduction .............................................................................................................................................. 45
Limited Warranty ...................................................................................................................................... 45
Online Warranty Registration............................................................................................................. 46
Tech Support ............................................................................................................................................ 46
Recording ProxyServer Information................................................................................................... 46
Service ..................................................................................................................................................... 47
The Multi-Tech BBS ................................................................................................................................. 48
To log on to the Multi-Tech BBS......................................................................................................... 48
To Download a file.............................................................................................................................. 48
About CompuServe.................................................................................................................................. 50
About the Internet..................................................................................................................................... 50
About the Multi-Tech Fax-Back Service ................................................................................................... 50
Glossary

ONE
Chapter 1
5
Introduction and Description
Introduction
If you haven’t already done so, go through your Installation Manual which details how to
install the ProxyServer and the ProxyServer utilities. Be sure to follow all instructions.
Congratulations on purchasing the best in networking technology. The ProxyServer acts
as a central dial-out Internet access point for all of your network clients. The
ProxyServer accomplishes this by allowing all of your network clients to simultaneously
share:
• 1 Modem or ISDN TA
• 1 regular dial-up account from your ISP.
• 1 IP address that can be either dynamic or static
The ProxyServer Utilities
The ProxyServer utilities include:
•ProxyServer Wizard:A step-by-step process that will let you input all the basic
settings that are needed to configure your ProxyServer for general usage. All
settings that are entered here will also be shown in their respective menus in
ProxyServer Manager.
•ProxyServer Manager: ProxyServer Manager is the main program used to
configure all the settings of your ProxyServer.
•ProxyServer Monitor: ProxyServer Monitor is a multipurpose utility that was
designed for letting you know the status of your ProxyServer connection. It provides
a step-by-step event monitor whereby on each event you can point and click to bring
up an on-line help screen that will advise you of any troubleshooting procedures that
are needed.

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6
ProxyServer Features and Benefits
• Built-in DHCP Server can automatically assign your network clients their IP
information and gateway.
• Dial-on-Demand eliminates the need for dial-up utilities and also dials-out only when
needed saving on phone and ISP charges.
• Idle-Time out automatically disconnects the connection if there has been no traffic
for a set period of time.
• Flash ROM allows firmware to be easily upgraded.
• Internal Firewall prevents unauthorized access to your network.
• Client Filter lets you decide which clients on your network are allowed access to
which services (Internet, E-mail, etc.).
• Virtual Server allows you to set up your own Web or FTP (File Transfer Protocol)
server.Also provides support for Internet Telephony, Chat and Video Conferencing.
• 460K bps baud rate easily supports 128K bps ISDN TAs or 56K bps analog
modems.
Some ProxyServer FAQs
Q: Can the ProxyServer support both dynamic and fixed IP addresses?
A: Yes, the ProxyServer supports both dynamic and fixed IP addresses.
Q: How many simultaneous sessions can the ProxyServer handle?
A: The ProxyServer serial port can simultaneously handle 16 FTP sessions plus 32
others (Telnet, mail, etc.).
Q : How many simultaneous clients can the ProxyServer handle?
A: The serial port on the ProxyServer can handle 32 simultaneous clients.
Q : How many workstations on a LAN can the ProxyServer handle?
A: The ProxyServer can handle up to 253 workstations on your LAN.
Q : Can the ProxyServer be used with Novell or other Networks?
A: Yes, for the ProxyServer to work, just install TCP/IP protocol on client computers. The
computers don’t have to interact with Novell or any other servers to access the
ProxyServer.
Its a Proxy
who?

TWO
Chapter 2
7
ProxyServer Wizard
Introduction
ProxyServer Wizard is a program that will let you configure your ProxyServer quickly and
easily. It is a step-by-step process that will let you input all the basic settings that are
needed to configure your ProxyServer for general usage.All settings that are entered
here will also be shown in their respective menus in ProxyServer Manager.
After you have installed the ProxyServer utilities, you will automatically be brought into
ProxyServer Wizard .
To Run ProxyServer Wizard from Windows 95/NT, click Start | Programs | ProxyServer
| ProxyServer Wizard.

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8
The ProxyServer Wizard
The following steps will guide through the installation and setup of your ProxyServer.
Step 1: Select the Device you Wish to Configure
ProxyServer Wizard will automatically check your network for available ProxyServer
servers which will be displayed in the device list. You can click the “Refresh Device List”
button to update this list.
The first thing you must do is select the ProxyServer that you will be configuring from the
Device Name list.
Click Next to continue.
Step 2: Set the Device’s IP Address and Name
The next thing you must do is give your ProxyServer an IP address on your network.
This is NOT the IP address from your ISP but the local, internal LAN IP address.
Note: Please Pick an IP address that won’t conflict with any other PCs or devices on
your network.
The first three octets of every device or computer’s IP address on your network should
be the same. ProxyServer Wizard will help you by automatically detecting the IP
address of your computer and set the first three octets for you. You need only decide the
last octet.
When you are finished, click Next to Continue.

Chapter 2 - ProxyServer Wizard
9
Step 3: Input your ISP Information for Internet Access
The next thing you must do is input your ISP (Internet Service Provider) information
which will be used to dial-up and login to your ISP when your clients use their Internet
applications.
Telephone Number
Enter your ISP’s telephone number in the Telephone Number field.
Note: If in your office or company you must dial a number to get an outside line (For
example this is often the number “9” or “0”), you should enter the number plus a “w”
which will instruct the ProxyServer to wait until a dial-tone is received before dialing. For
example the phone number 555-2323 which uses 9 to get an outside line would be
entered as 9w555-2323. The ProxyServer also supports commas which function as
delay variables. So our example number could also be entered as 9,,5552323. Each
comma will provide around a 3-4 second delay.
Note: ISDN TA Setup
If you would like to bundle your two ISDN B-channels together, you need to enter the two
phone numbers in the Telephone Number field. Usually ISDN TAs support either the “+”
or “&” command so when entering the phone numbers you can enter them as either, for
example, “555-2323 + 555-2121” or “555-2323 & 555-2121”. If your ISDN TA doesn’t
support “+” or “&” you should see your ISDN TA user’s manual to see how it is possible
to enter the two phone numbers.
!!! Extremely Important !!!
Please also make sure you read the ISDN TA Setup note when you get to the “Select
Modem and Baudrate” step of ProxyServer Wizard .
User Name
Enter the user name of your ISP account in the User Name field.
Password
Enter the Password of your ISP account in the Password field and then re-confirm it be
entering it again in the Password Verification field.
When you have finished, click Next to continue
TA

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10
Step 4: Input your ISP’s DNS Server IP Address
Enter the DNS Server IPAddress provided to you by your ISP. This information is usually
provided to you with the information package given to you by your ISP. If you can’t find
your ISP’s DNS Server IP address your easiest solution is to contact someone at your
ISP and ask them for their DNS Server IP address.
When you are finished, click Next to continue.
Step 5: Select Modem and Set Baudrate
Enter the modem that you are using and the baudrate (i.e., the speed of communication
between the ProxyServer and your modem or ISDN TA). This is a very important setting
and determines the communication between your ProxyServer and modem.
Modem
You can use the Select Modem button to select your Modem or ISDN TA. This setting
will configure the initial string in the ProxyServer so that it will know how to communicate
with your modem. If you are using an analog modem but do not see your modem in the
modem selection list, in most cases the default setting of Standard Modem will work.

Chapter 2 - ProxyServer Wizard
11
Note: ISDN TA Setup
!!! Extremely Important !!!
If you do not see your ISDN TA listed, you need to enter the initial string for this TA in
ProxyServer Manager’s Modem Settings menu. Once you have finished ProxyServer
Wizard press the Run Manager button and refer to Chapter 3 - ProxyServer Manager :
Modem Settings for instructions.
Baudrate
In the Baudrate field select the DTE Speed (i.e., the speed of communication between
the ProxyServer and modem or ISDN TA) Normally this can be about 4 times the speed
of your modem for 4 times compression modems.
Note: The absolute maximum you should set the baudrate for a given port on your
ProxyServer is 4 times the speed of your modem. If you set the baudrate too high, the
ProxyServer may not be able to dial-up a connection. For example if you have a 14.4K
bps modem, the highest you should set the baudrate is 57.6K bps.Also note that due to
ISP connections and phone line conditions this maximum speed is theoretical and not
guaranteed.
When you are finished, click Next to continue.
Step 6: Verify the Setup Configuration
The settings that you have just configured will be summarized here. Please check to
make sure that all the settings you have entered are correct.
If you see that you have configured a setting incorrectly, click Back to go back to the
screen with the mistake and correct it.
When you are satisfied with your configuration, click Finish to save your configuration to
the ProxyServer and complete the ProxyServer Wizard.
TA

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12
Final ProxyServer Wizard Notes
Once you have completed the ProxyServer Wizard , the following screen appears:
1) If you need to go into ProxyServer Manager to configure more advanced settings,
you can open the program directly from here by pressing the Run Manager button
on the bottom of your screen.
2) If you don’t need to configure anything else in ProxyServer Manager, click Run
Monitor and then use ProxyServer Monitor’s Test Connection function to see if
your ProxyServer can dial-up a connection with the settings that you have
configured. Please see Chapter 4 - ProxyServer Monitor for instructions.
3) Once Test Connection has verified your connection, go to Chapter 5 – Setting Up
Your ProxyServer Clients and follow all instructions carefully.
Make Sure You Read
These Notes

ProxyServer User Guide
14
General Settings
General Settings contains all the major settings of your ProxyServer. This includes IP
information, DNS IP addresses and ISP information for dial-up Internet access. Most of
the information displayed here was entered in ProxyServer Wizard and does not need to
be entered again.
Server IP Address
The IP address of your ProxyServer is the unit’s LAN Address. In our example network
the IP address of 192.168.2.1, that we gave the ProxyServer in ProxyServer Wizard , is
displayed here.
Server Subnet Mask
The ProxyServer Subnet Mask can usually be left as it’s default entry 255.255.255.0.
External (Port) IP Address
The External (Port) IP address is the IP address that is given to you by your ISP. An IP
address is often dynamically assigned by your ISP (i.e., it changes every time you log-
on). To have this address assigned by the ISP leave this field as it’s default entry 0.0.0.0.
If you have been given a static IP address by your ISP you can enter it in this field.
DNS Server IP Address(s)
The DNS Server IP address that you entered in ProxyServer Wizard will be displayed
here. The ProxyServer supports multiple DNS Servers which can be entered here.
Allow connection to be established by dial-in
This option is usually employed for the Virtual Server function of the ProxyServer.
(Please see Chapter 3 – ProxyServer Manager : Virtual Server). This option does
NOT mean remote access as the ProxyServer does not support remote access.
However, the ProxyServer does support the function of letting your ISP dial-in to the
InternetAccess to establish the connection. If you would like to allow the connection to
be established by dial-in, enable this option.

Chapter 3 - ProxyServer Manager
15
Callback Telephone Number
If you have selected the “Allow connection to be established by dial-in” option, you
can use the Callback Telephone number function of the ProxyServer. You can use this
function if you do not want to have a permanent connection to your ISP up all the time
and your ISP will not support the telephone charge to dial-in to your network when people
try and access your static IP address or domain name.After you have entered your ISP’s
phone number in this field, when anyone calls up the ProxyServer, the ProxyServer will
automatically hang up and dial the ISP’s phone number establishing the Internet
connection. For information on the purpose of this function please see Chapter 3 –
ProxyServer Manager : Virtual Server.

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16
Modem Settings
The Modem Settings let the serial port on your ProxyServer know how to communicate
with the attached modem or ISDN TA.
Baudrate
The baudrate that you entered in ProxyServer Wizard will be displayed here.
Note: The absolute maximum you should set the baudrate for a given port on your
ProxyServer is 4 times the speed of your modem. If you set the baudrate too high, the
ProxyServer may not be able to dial-up a connection. For example if you have a 14.4K
bps modem, the highest you should set the baudrate is 57.6K bps. You should also be
aware of the fact that since some ISP connections and phone lines are not of the
greatest quality, this theoretical maximum speed is not attainable and you should set the
baudrate at a lower speed.
Select Modem and Modem String Setting
The most important modem string is the initial string because the ProxyServer uses it to
establish communication with your modem or ISDN TA. The modem initial string
displayed here was configured automatically when you selected your modem or ISDN TA
in ProxyServer Wizard. If your modem is not listed in the Modem Selection List, the
Standard Modem selection will work with most modems.
Note: ISDN TA Setup
!!! Extremely Important !!!
Unfortunately, unlike most modems, ISDN initial strings vary between different ISDN TAs
and there is no “Standard ISDN TA” initial string. If your ISDN TA is not listed in the
modem selection list you must find out what your ISDN TA initial string is. Your ISDN
TA’s initial string should be listed in your ISDN TA user’s manual. There are probably
many initial strings listed for your ISDN TA. The one you are looking for is Asyn-to-Syn
PPP (Asynchronous to Synchronous PPP). You can enter this initial string if you would
like to use only one channel of your ISDN TA. If you would like to bundle both channels of
your ISDN TA together, you need to use a different initial string called Multilink-PPP. For
example, the initial strings for a Zyxel Omninet ISDN TA are:
1) ATB40: Asyn-to-Syn PPP initial string
2) AT&J3: Multilink-PPP initial string
You should also verify that your ISDN TAsupports the Dialup string ATDT. Most ISDN
TA

Chapter 3 - ProxyServer Manager
17
TAs will support ATDT and usually the rest will support ATD or ATDI.
Please also note that to bundle the two channels of your ISDN TA together, you must
enter the two phone numbers in the Telephone Number field of the Modem settings
menu. See Chapter 3 – ProxyServer Manager : Modem Settings.
Enable Login Script
With the login script you can manually input the communication between your Modem
and ISP. Most ISPs support automatic PPP negotiation but if your ISP does not support
automatic PPP negotiation you will have to enter a login script. You can also use the
login script to enter a second backup ISP or write a script that makes the ProxyServer
redial until a successful connection has been established. To write a login script, first
click on the Enable Login Script option box. The ProxyServer login script commands
and some examples are provided on the next few pages.

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18
Writing a Login script
Step A) Learn the ProxyServer Login Script Commands
Available to you
Example Commands Result
Send and SH
Send “ATZ” Resets Modem
Send “ATDT 555-3636” Dials phone number 555-3636
Send “JohnSmith” Types “JohnSmith” at ISP interface
SH “1234” Types the “1234” at ISP interface but displays **** in
ProxyServer Monitor display to hide password
Send “” Types Enter key at the ISP Interface (Important for ISPs like
Compuserve)
Wait
Wait 5 Modem will wait for 5 seconds before going to next
command
Wait “CONNECT” Modem will wait for “CONNECT” to come onto screen before
going to next command
Wait “CONNECT” 6 Modem will wait for “CONNECT” to come onto screen before
going to next command. If connect does not come onto
screen modem will go back to line 6 of Login Script
Other
Go Begins User Service
Jump 4 Will go back to command line 4
Hangup Hangs up Modem

Chapter 3 - ProxyServer Manager
19
Step B) Get Login Script Information
Because every ISP has a different interface screen when logging in, you must check to
see when and how your ISP requests information from you. The ProxyServer uses PPP
user service so when logging into your ISP find out the selection for PPP Service.
You can get your ISP interface login screen by doing a simple dial-up connection using
the Dialup Networking utility in Windows 95. Your Windows 95 Dial-up Networking
folder is located in the My Computer icon.
For example, the screen below shows the opening display screen for an ISP called
“HINET”. The important parts of the screen where the ISP requests information are
highlighted.
Annex Command Line Interpreter * Copyright (C) 1988, 1995 Xylogics,
Inc.
Checking authorization, Please wait...
Enter username: Jerry
Enter password: ***
Last login: Mon May 19 12:20:53 1998 on 168.95.95.195/42 (022:03/
001:43)
Permission granted
(Welcome to HiNet) *********************************************
1. PPP users service
2. SLIP users service
3. Telnet service
4. Exit
( Please key-in your choice ) ===> 1
..Switching to PPP.

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20
Step C) Make your login Script
Below are two examples of the login scripts for our example ISP. On the left is the actual
inputted login script. On the proceeding page we highlighted the important parts that you
needed to note which are again highlighted below where they are used.
Example 1: Script for Normal Reliable ISP
Login Script Meaning of Each Login Script Command
Send “ATZ” Resets modem
Send “AT S0 = 1” Sends initial string “AT S0 = 1” to modem
Send “ATDT 5552121” Dials phone number 555-2121
Wait “CONNECT” Waits for ISP to send reply “CONNECT”
Wait “username:” Waits for ISP to send reply “username”
SH “Jerry” Sends the user- name “Jerry” to ISP
Wait “password:” Waits for ISP to send reply “password”
Send “1234” Sends password “1234” to ISP”
Wait “ ===>” Waits for ISP to send reply “===>”
Send “1” Selects option 1 (PPP) for this ISP Starts PPP mode
Example 2: Script for Unreliable ISP (Redial until connected)
# Login Script Meaning of Each Login Script Command
1 Send “ATZ” Resets modem
2 Send “AT S0 = 1” Sends initial string “AT S0 = 1” to modem
3 Send “ATDT 5552121” Dials phone number 555-2121
4 Wait “CONNECT” 2 Waits for ISP to send reply “CONNECT” If not will go back to
line 2 to redial
5 Wait “username:” 12 Waits for ISP to send reply “username”. If no response will
go to line 12
6 Send “Jchan” Sends the username “Jchan” to ISP
7 Wait “password:” Waits for ISP to send reply “password”
8 SH “****” Sends password “****” to ISP”
9 Wait “ ===>” Waits for ISP to send reply “===>”
10 Send “1” Selects option 1 (PPP) for this ISP
11 Go Starts PPP mode
12 Hangup Hangs up Modem
13 Jump 2 Goes back to line 2 to redial