SynOptics 3395 Programming manual

Software Management Guide
for the Model 3395/3395A
Terminal Server
Supplement 5.2
SynOptics Communications, Inc.
4401 Great America Parkway
Santa Clara, CA 95052-8185
[phone]
893-763-A July 1994

ii 893-763-A
© 1994 by SynOptics Communications, Inc. All rights reserved.
Trademarks
SynOptics, SynOptics Communications, and LattisNet are registered trademarks of SynOptics
Communications, Inc. Lattis System 3000 and SynOptics Press are trademarks of SynOptics
Communications, Inc.
Other brand and product names are registered trademarks or trademarks of their respective holders.
Statement of Conditions
In the interest of improving internal design, operational function, and/or reliability, SynOptics
Communications, Inc. reserves the right to make changes to the products described in this document
without notice.
SynOptics Communications, Inc. does not assume any liability that may occur due to the use or
application of the product(s) or circuit layout(s) described herein.
Federal Communications Commission (FCC) Statement
Note: This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy. If it is not installed and used in accordance with the
instruction manual, it may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference, in which case users will be required to
take whatever measures may be necessary to correct the interference at their own expense.
Electromagnetic Emissions
Meets requirements of
FCC Part 15, Subparts A and B, Class A
En 55 022 (CISPR 22:1985), Class A
General License VDE 0871, Class B (AmtsblVfg No. 243/1991 and Vfg 46/1992)
VCCI Class 1 ITE
This supplement contains new pages and replacement pages for the Software Management Guide for the
Model 3395/3395A Terminal Server, 893-158-C. Follow these instructions to add and replace pages in this
manual: Replacement Pages
The following new pages: Replace these existing pages:
i through xiii i through xi
Chapter 5 Chapter 5
index-1 through index-6 index-1 through index-6
Addendum Pages
Add these pages: Following this page:
Chapter 20 Setting Up SecurID 19-9
Chapter 21 Setting Up ARAP 20-4

Software Management Guide
for the Model 3395/3395A
Terminal Server
Version 5.2
SynOptics Communications, Inc.
4401 Great America Parkway
Santa Clara, CA 95052-8185
[phone]
893-763-A July 1994

ii 893-763-A
© 1994 by SynOptics Communications, Inc. All rights reserved.
Trademarks
SynOptics, SynOptics Communications, and LattisNet are registered trademarks of SynOptics
Communications, Inc. Lattis System 3000 and SynOptics Press are trademarks of SynOptics
Communications, Inc.
Other brand and product names are registered trademarks or trademarks of their respective holders.
Statement of Conditions
In the interest of improving internal design, operational function, and/or reliability, SynOptics
Communications, Inc. reserves the right to make changes to the products described in this document
without notice.
SynOptics Communications, Inc. does not assume any liability that may occur due to the use or
application of the product(s) or circuit layout(s) described herein.
Federal Communications Commission (FCC) Statement
Note: This equipment has been tested and found to comply with the limits for a Class A digital device,
pursuant to Part 15 of the FCC rules. These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy. If it is not installed and used in accordance with the
instruction manual, it may cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference, in which case users will be required to
take whatever measures may be necessary to correct the interference at their own expense.
Electromagnetic Emissions
Meets requirements of
FCC Part 15, Subparts A and B, Class A
En 55 022 (CISPR 22:1985), Class A
General License VDE 0871, Class B (AmtsblVfg No. 243/1991 and Vfg 46/1992)
VCCI Class 1 ITE

893-763-A iii
Table of Contents
Preface
Conventions xvi
Ordering SynOptics Publications..............................................................................................xvii
SynOptics Customer Support..................................................................................................xvii
Chapter 1 - Introducing the Model 3395 Terminal Server
Obtaining Operating Software and Parameters.............................................................................1-2
Compatibility Issues..............................................................................................................1-2
Terminal Server Software Management Tools.............................................................................1-3
Software Management Tools .............................................................................................1-3
Standard DEC Software Installation and Management Tools ....................................................1-3
Chapter 2 - Setting Up the Terminal Server
Setting Up the Terminal Server................................................................................................2-1
Changing Operational Parameters.......................................................................................2-2
Assigning Basic Internet Characteristics.....................................................................................2-2
Assigning an Internet Address and Subnet Mask....................................................................2-2
Configuring Domain Name Server Support..........................................................................2-2
Related Commands and Server Characteristics.......................................................................2-3
Selecting Protocols and Features ..............................................................................................2-5
Chapter 3 - Setting Up Terminal Devices
Basic Procedures....................................................................................................................3-1
Preparing the Host for Local Access Connections........................................................................3-2
LAT Services .................................................................................................................3-2
TCP/IP Connections........................................................................................................3-2
Preparing Specific Types of Terminal and Ports ..........................................................................3-4
Setting Up Standard Terminals...........................................................................................3-4
Using Personal Computers as Terminals..............................................................................3-5
Setting Up Hard Copy (Printing) Terminals .........................................................................3-5
Setting Up Dedicated Services............................................................................................3-5
Setting Up Multisessions Terminals...................................................................................3-6
Using the Menu Feature ...................................................................................................3-6

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Chapter 4 - Setting Up Printers
How to Set Up Shared Printers ................................................................................................4-2
Setting Up a UNIX Shared Printer Service .................................................................................4-3
Installing the Shared Printer Output Filter............................................................................4-3
Defining a Printer to the UNIX Printer Subsystem ................................................................4-5
Operating the Shared Printer..............................................................................................4-6
Error Conditions .............................................................................................................4-6
Restrictions....................................................................................................................4-8
UNIX Shared Printer Protocol Description ...........................................................................4-8
Setting Up a UNIX PostScript Printer Service............................................................................4-10
Setting Up a VMS/Ultrix Printer Service...................................................................................4-12
VMS Hosts....................................................................................................................4-13
Ultrix Hosts...................................................................................................................4-14
Setting Up Services and Queues for Remote Access Connections ...................................................4-15
The Server Connection Queue............................................................................................4-16
Chapter 5 - Setting Up Modems
Setting Up Dial-In Modems ....................................................................................................5-1
Setting Up Dial-Back Modems.................................................................................................5-3
Using Dial-Back Scripts on the Terminal Server....................................................................5-3
Configuring PORT Characteristics .....................................................................................5-4
Setting Up a Dial-Back Script Server ..................................................................................5-5
Script File Structure and Guidelines....................................................................................5-7
Setting Up a Dial-Out Modem.................................................................................................5-9
Basic Procedure...............................................................................................................5-9
Configuring a LAT Application Port at a VMS Host.............................................................5-11
Modem Control Operation ......................................................................................................5-12
Device Types..................................................................................................................5-12
Supported Modem Control Signals.....................................................................................5-13
Information About Model 3395 Cabling Methods..................................................................5-13
Modem-Related PORT Characteristics.................................................................................5-14
Server Modem Disconnect Sequence....................................................................................5-16
Modem Control Signal Interaction......................................................................................5-17
Using Signal Check...............................................................................................................5-26
Flow Control .......................................................................................................................5-27
Software Flow Control.....................................................................................................5-27
Hardware Flow Control ....................................................................................................5-28
Chapter 6 - Setting Up TN3270 Terminals
Enabling the TN3720 Protocol ................................................................................................6-1
Enabling Extended Attributes.............................................................................................6-2
Defining TN3270 Devices.......................................................................................................6-2
Creating a New Device Type .............................................................................................6-3
Defining a TN3270 Terminal Type.....................................................................................6-3
Defining the TN3278 Type ...............................................................................................6-4
Modifying the Keymap.....................................................................................................6-4
Modifying the Screenmap .................................................................................................6-5
Assigning a TN3270 Device to a Port.................................................................................6-9
Other Commands That Affect TN3270 Devices.....................................................................6-11
Defining TN3270 Translation Tables ........................................................................................6-11
Creating a New Translation Table.......................................................................................6-12
Entering New Values Into the Table....................................................................................6-13
Assigning a Translation Table to a Port...............................................................................6-15
Other Commands that Affect Translation Tables....................................................................6-16

893-763-A v
Local Printer Support.............................................................................................................6-17
Chapter 7 - Using TCP/IP Features
Configuring Internet Routes....................................................................................................7-1
Dynamic Routing ...........................................................................................................7-1
Static Routing................................................................................................................7-2
Related Commands and Terminal Server Characteristics..........................................................7-2
Configuring Rotary Connections..............................................................................................7-3
Rotary Configuration Procedure .........................................................................................7-4
Domain Name Storage .....................................................................................................7-5
Associated Commands......................................................................................................7-5
Configuring RLOGIN Support ................................................................................................7-6
Associated Commands......................................................................................................7-7
Remote Network Management Support .....................................................................................7-7
Using SNMP .................................................................................................................7-7
Associated Commands......................................................................................................7-9
Using Telnet to Gain Access to Remote Console Ports ..........................................................7-10
Associated Commands......................................................................................................7-11
Loading With Internet Protocols...............................................................................................7-11
Loading Images and Parameter Files....................................................................................7-13
Configuring Protocols on Servers with NVR........................................................................7-13
Directed TFTP Request.....................................................................................................7-14
Merit Value of Responses.................................................................................................7-14
Filenames in NVR ..........................................................................................................7-14
Eliminating TFTP Broadcasts............................................................................................7-14
Saving Parameters in the Permanent Database.......................................................................7-15
Dump Transmission ........................................................................................................7-15
Associated Commands......................................................................................................7-16
Using the Terminal Server as a Domain Name Server...................................................................7-16
Associated Commands......................................................................................................7-17
Configuring the Terminal Server to Use SLIP ............................................................................7-18
Terminal Server and Port Configuration...............................................................................7-18
SLIP Sessions................................................................................................................7-20
Associated Commands......................................................................................................7-20
Using IP Reassembly.............................................................................................................7-21
Associated Commands......................................................................................................7-21
Using TCP Resequencing .......................................................................................................7-21
Associated Commands......................................................................................................7-23
Chapter 8 - Managing Terminal Server Resources
How the Terminal Server Allocates Memory ..............................................................................8-1
Strategies for Managing Memory .............................................................................................8-2
Select Only Features and Protocols Necessary at Your Site......................................................8-2
Alter Operating Parameters for the Enabled Features or Protocols .............................................8-5
Use a Terminal Server With More Memory..........................................................................8-5
Accept Less Than Optimal Performance or Less Functionality.................................................8-6
Parameters that Directly Affect Memory Allocation .....................................................................8-6
Identifying Memory Problems ...........................................................................................8-7
Adjusting Parameters .......................................................................................................8-8
Server Node Limit...........................................................................................................8-8
Server Queue Limit .........................................................................................................8-9
Server Session Limit .......................................................................................................8-9
Server Service Groups......................................................................................................8-9
Server Textpool Size........................................................................................................8-9
Server Packet Buffers .......................................................................................................8-10

vi 893-763-A
Parameter Server Limit.....................................................................................................8-10
Port Typeahead Size.........................................................................................................8-10
Port Internet TCP Window Size.........................................................................................8-11
Helpful Displays...................................................................................................................8-11
The SHOW|MONITOR SERVER COUNTERS Display........................................................8-11
The SHOW|MONITOR SERVER STATUS Display.............................................................8-11
The SHOW|MONITOR SERVER ALTERNATE STATUS Display.........................................8-13
Chapter 9 - Using Terminal Server Security Features
Controlling Access to the Terminal Server.................................................................................9-1
Terminal Server Passwords................................................................................................9-1
Privilege Levels..............................................................................................................9-3
The Kerberos Security System...........................................................................................9-4
Controlling Access to Resources on the Network ........................................................................9-8
The Port Access Characteristic...........................................................................................9-8
Limited View Protection for Network Resources ...................................................................9-8
Authorized LAT Service Groups.........................................................................................9-9
Password Protection for LAT Services.................................................................................9-9
Using the Internet Security Table .......................................................................................9-9
Default Values for the Internet Security Table.......................................................................9-11
Using Scripts to Enhance Network Security ...............................................................................9-16
Dedicated Services ...........................................................................................................9-16
Dial-back Modem Scripts..................................................................................................9-17

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Chapter 10 - Using the Accounting Feature
Enabling the Accounting Feature on the Terminal Server..............................................................10-1
Enabling the syslogd Daemon..................................................................................................10-2
About Information in the Account Log......................................................................................10-2
Enabling the Verbose Account Log —The Default Account Log ..............................................10-4
Specifying a Verbose Priority Number and Log File Location..................................................10-4
Clearing the Account Log.................................................................................................10-5
Commands Associated With the Accounting Feature....................................................................10-6
Chapter 11 - Using Scripts
How the Script Feature Works.................................................................................................11-1
Setting Up the Script Servers ..................................................................................................11-2
Developing a Script File...................................................................................................11-4
Directory Requirements ....................................................................................................11-5
Setting Up the Terminal Server to Use Scripts............................................................................11-6
Associated Commands......................................................................................................11-7
Script File Execution and Processing ..................................................................................11-7
Examples of Scripts...............................................................................................................11-9
Chapter 12 - Model 3395 Support for the Xremote Protocol
Terminal Server Support for Xremote Features............................................................................12-1
Starting Up the XDM Host.....................................................................................................12-3
Configuring the Terminal Server for Xremote Support.................................................................12-5
Enabling the Xremote Protocol on the Terminal Server ..........................................................12-5
Defining Remote Font Servers...........................................................................................12-5
TFTP Security on Font Servers .........................................................................................12-7
Defining Xremote Characteristics at Terminal Server Ports......................................................12-8
Establishing an Xremote Session .......................................................................................12-9
Using a Script to Configure the Terminal Server for Xremote Support......................................12-12
Enhancing Security for Xremote Users ................................................................................12-14
Notes on Memory Requirements for Xremote .............................................................................12-15
How Xremote Can Affect Terminal Server Performance..........................................................12-15
Memory Requirements for Sessions and Windows .................................................................12-15
Notes and Restrictions......................................................................................................12-16
Chapter 13 - Model 3395 Support for the Point-to-Point Protocol
About the Point-to-Point Protocol............................................................................................13-1
Enabling PPP on the Terminal Server.......................................................................................13-3
Setting Up Terminal Server Ports to Support PPP ......................................................................13-4
Specifying Optional PPP Port Characteristics.......................................................................13-5
Configuring a PPP Port for Modem Support........................................................................13-6
Assigning Local and Remote PPP Addresses to PPP Ports......................................................13-6

viii 893-763-A
Examples of Single-Node Configurations...................................................................................13-7
A PC With an Internet Address Within the LAN Subnet.........................................................13-8
A PC With an Internet Address Outside of the LAN Subnet.....................................................13-9
A PC With No Configured Internet Address..........................................................................13-11
Example of a Two-Node Configuration......................................................................................13-13
Chapter 14 - Configuring Print Services for Novell Users
Using Model 3395 Commands to Configure Novell Printing.........................................................14-2
Configuring a Port to Support Novell Printing.....................................................................14-2
Viewing Available Novell Printer Servers............................................................................14-3
Viewing Status of Xprinter Ports .......................................................................................14-3
Terminating Xprinter Operations........................................................................................14-3
Viewing IPX Protocol Packet Type Setting..........................................................................14-4
Novell Server Configuration....................................................................................................14-5
Adding a New NetWare Print Server....................................................................................14-7
Changing an Existing NetWare Print Server.........................................................................14-15
Chapter 15 - Managing Initialization Records
Viewing Initialization Parameters.............................................................................................15-1
Enabling and Disabling Protocols.............................................................................................15-2
Model 3395 Terminal Servers............................................................................................15-2
Changing Protocols from the Command Interface..................................................................15-2
Using the CARD, NVS, LattisNet, and MOP Protocols.........................................................15-3
Using the BOOTP and RARP Protocols..............................................................................15-4
Using the DTFTP Protocol...............................................................................................15-4
Resetting Initialization Parameters to Default Values ...................................................................15-5
Chapter 16 - Setting Up Server Daemons
Enabling Daemons at the Server...............................................................................................16-2
Using the Finger Daemon (fingerd)...........................................................................................16-2
Using the Route Daemon (routd)..............................................................................................16-6
Using the Rwho Daemon (rwhod).............................................................................................16-7
Chapter 17 - Setting Printers Using the lpd Daemon
Setting Up lpd Shared Printers.................................................................................................17-1
Enable the lpd Daemon at the Terminal Server......................................................................17-1
Set Port Characteristics to Support Shared Printer Connections................................................17-2
Setting up queues for lpd
Setting up Berkeley (BSD) UNIX lpd printers
Configuring the lpd Printer at the UNIX Host.......................................................................17-3
Setting up AT&T System V UNIX lpd printers ....................................................................17-6
Setting up AIX lpd printer ................................................................................................17-7
Operating and Managing the lpd Printer and Print Queue...............................................................17-9

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Chapter 18 - Using Nested Menus
About the Nested Menus Feature..............................................................................................18-1
How the Terminal Server Obtains the Menu File...................................................................18-3
How the Port Obtains the Menus .......................................................................................18-3
Setting Up the Script Servers ..................................................................................................18-4
Creating the Nested Menus File ...............................................................................................18-5
Using Comment Lines in the Menu File .............................................................................18-8
Programming Guidelines ..................................................................................................18-8
Debugging the Menu File.................................................................................................18-8
Configuring the Terminal Server to Support Nested Menus...........................................................18-9
Terminal Server Characteristics..........................................................................................18-9
Port Characteristics..........................................................................................................18-10
Sample Nested Menu Files......................................................................................................18-11
Sample File 1.................................................................................................................18-11
Sample File 2.................................................................................................................18-14
Chapter 19 - Installing and Using the csportd Daemon
Running the Installation Script................................................................................................19-2
csportd Command And Options................................................................................................19-4
Communication Server Port Setup Considerations.......................................................................19-4
Example Applications............................................................................................................19-4
Example csportd Installation Script...........................................................................................19-6
Chapter 20 - Setting Up SecurID
SecurID Client Features..........................................................................................................20-1
SecurID Client Setup.............................................................................................................20-2
Configuring the SecurID Client at the UNIX Host.................................................................20-2
Install the Model 3395 Load Image Which Contains the SecurID Client ....................................20-2
Enable The Server SecurID Feature.....................................................................................20-3
Specify Server-Related SecurID Characteristics......................................................................20-3
Configure Ports To Require SecurID Authentication ....................................................................20-4
Chapter 21 - Setting Up ARAP
ARAP Features.....................................................................................................................21-2
ARAP Setup21-5
Overview.......................................................................................................................21-5
Install the Model 3395 Load Image for the Remote Access Server.............................................21-5
Verify Port Cabling.........................................................................................................21-6
Enable the server ARAP Protocol.......................................................................................21-8
Specify SERVER Characteristics .......................................................................................21-9
Specify PORT Characteristics............................................................................................21-10
Install CCL Cripts ..........................................................................................................21-12

x893-763-A
Using ARAP with Authentication and Dial-Back Features.............................................................21-15
Modifying CCL Scripts for Macintosh Computers ......................................................................21-20
Basic Format of a CCL Script ...........................................................................................21-20
Modify a CCL Script.......................................................................................................21-22
Example Model 3395 CCL Extensions................................................................................21-23
Example of a Typical CCL Script ......................................................................................21-26
Modifying Dial-Back Scripts for ARAP Ports.............................................................................21-32
ARAP Planning Considerations...............................................................................................21-33
Appendix A - Shared Printer Source Code
Sample UNIX Output Filter File..............................................................................................A-1
Sample BSD UNIX Printcap File.............................................................................................A-19
Sample AT&T UNIX System V Interface File............................................................................A-20
Shared UNIX Printer Daemon File............................................................................................A-22
Appendix B - OPCOM Messages
Appendix C - DECserver Software Difference Data
Appendix D - Notes on Local and Remote Parameter Storage
Concurrent Local and Remote Parameter Storage.........................................................................D-1
Index

Figures
893-763-A xi
Figure 1-1. Network configuration with terminal servers..........................................................1-1
Figure 3-1. A sample terminal server menu...........................................................................3-6
Figure 4-1 Shared printer topology .....................................................................................4-1
Figure 4-2. Shared printer protocol overview .........................................................................4-8
Figure 4-3. Registration data..............................................................................................4-9
Figure 4-4. Example VMS print queue command file..............................................................4-4
Figure 5-1. Example script server directory structure ...............................................................5-6
Figure 5-2. State diagram for dial-in modems that support RNG................................................5-18
Figure 5-3. State diagram for dial-in modems that do not support RNG......................................5-20
Figure 5-4. State diagram for dial-out modems.......................................................................5-22
Figure 5-5. State diagram for dial-in/out modems that support RNG..........................................5-24
Figure 5-6. State diagram for dial-in/out modems that do not support RNG.................................5-26
Figure 7-1. Rotary connections...........................................................................................7-3
Figure 7-2. A connection to a host with RLOGIN..................................................................7-6
Figure 7-3. Sample SNMP application.................................................................................7-9
Figure 7-4. Telnet connection to remote console ports.............................................................7-10
Figure 7-5. Loading with an Internet router ...........................................................................7-12
Figure 7-6. SLIP connections to remote netowrk, remote PC ...................................................7-19
Figure 9-1. A Kerberos realm .............................................................................................9-5
Figure 9-2. Kerberos password verification............................................................................9-6
Figure 9-3. An Internet network..........................................................................................9-12
Figure 10-1. A sample SHOW SERVER ACCOUNTING display ..............................................10-3
Figure 10-2. A sample verbose account log.............................................................................10-4
Figure 11-1. Example script server directory structure ...............................................................11-3
Figure 12-1. Conventional Xremote implementation................................................................12-2
Figure 12-2. An Xterminal connected to a System 3000 with a Model 3395 Terminal Server ...........12-3
Figure 12-2. Font servers ....................................................................................................12-6
Figure 13-1. PPP single-node configuration............................................................................13-2
Figure 13-2. A two-node configuration...................................................................................13-3
Figure 13-3. A PC with an Internet address within the LAN subnet.............................................13-8
Figure 13-4. A PC with an Internet address outside of the LAN subnet.........................................13-9
Figure 13-5. A PC with no configureed Internet address.............................................................13-11
Figure 13-6. Two terminal servers in a back-to-back gateway .....................................................13-12

xii 893-763-A
Figure 14-1. Example SHOW XPRINTER display...................................................................14-3
Figure 14-2. Example SHOW|LIST XPRINTER PORTS display ...............................................14-3
Figure 14-3 Example LIST|MONITOR|SHOW SERVER CHARACTERISTICS display...............14-4
Figure 14-4. Network printing environments...........................................................................14-6
Figure 15-1. A SERVER LOADDUMP characteristics display of a Model 3395 Terminal Server......15-1
Figure 18-1. A three-level menu structure...............................................................................18-2
Figure 18-2. A sample menu................................................................................................18-3
Figure 18-3. Example of script server directory structure............................................................18-4
Figure 21-1. Standard remote access configuration....................................................................21-2
Figure 21-2. Remote access configuration using Model 3395 Terminal Servers..............................21-3
Figure 21-3. Modular cables for connecting a modem................................................................21-6
Figure 21-4. Modular cables for connecting a Macintosh computer..............................................21-7
Figure 21-5. Operation of authentication and security methods..................................................21-16

Tables
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Table 2-1. Memory usage for Model 3395 Terminal Server features and protocols.......................2-7
Table 3-1. Model 3395 Terminal Server commands and menu items .........................................3-8
Table 6-1. IBM display station functions.............................................................................6-4
Table 6-2. Screenmap actions............................................................................................6-6
Table 6-3. Special values for escape sequences......................................................................6-8
Table 6-4. EBCDICTOSASII portion of the USENGLISH translation table...............................6-14
Table 6-5. ASCIITOEBCDIC portion of the USENGLISH translation table...............................6-15
Table 7-1. Initial settings for PORT INTERNET SLIP characteristics.......................................7-21
Table 8-1. Memory usage for Model 3395 Teminal Server features and protocols........................8-3
Table 8-2. Memory usage for various sesstion types..............................................................8-5
Table 8-3. Value ranges for node limit, parameter server limit, queue limit, and identification
size for all products.....................................................................................8-6
Table 8-4. Value ranges for server session limit and server text pool size...................................8-7
Table 8-5. PORT characteristics that affect memory usage ......................................................8-8
Table 10-1. Priority numbers for messages from UNIX daemons ...............................................10-5
Table 12-1. Default files ....................................................................................................12-4
Table 12-2. Settings for port characteristics ...........................................................................12-11
Table 15-1. Default and available protocols for loading and dumping ..........................................15-2
Table 15-2. Default load image names ..................................................................................15-3

Preface
893-763-A xv
This manual describes the configuration, setup, and management of a terminal server software
communication package, supplied by SynOptics Communications®. It is intended that this manual will be
read by network, terminal server, and UNIX and VAX system managers.
This manual is organized as follows:
Chapter 1 Introduces the Model 3395 software package, and describes some basic terminal server
management options.
Chapter 2 Describes how to configure the server to operate on the Internet, operate with a Domain
Name Server, and select the protocols and features that will be available on the server.
Chapter 3 Describes how to configure ports to operate with basic terminal devices.
Chapter 4 Describes how to configure UNIX and VMS shared printers, and UNIX shared PostScript
printers.
Chapter 5 Describes how to configure and troubleshoot dial-in, dial-back, and dial-out modems.
Chapter 6 Describes how you set up a port so that the terminal connected to the port emulates a
TN3270 device.
Chapter 7 Describes how to set up and manage terminal server TCP/IP Telnet features, configure the
server to operate with a Domain Name Server, establish Internet routes, manage Internet
security entries, create an Internet rotary group, and use the Serial Line Internet Protocol
(SLIP).
Chapter 8 Describes how you can allocate some portions of the memory in a server. This chapter also
describes how to identify problems with how this memory is allocated and how to adjust
parameters to correct these problems.
Chapter 9 Describes terminal server security features, and some of the issues you may want to consider
before you implement them at your site.
Chapter 10 Describes how to set up and use the session accounting feature. This feature records
information about successful and attempted connections made to or from the unit, as well as
information about sessions that are disconnected.
Chapter 11 Describes the Network Command Script feature, which provides the server manager with the
ability to create a script file which contains one or more Model 3395 commands to be
executed when the user logs in at a port.
Chapter 12 Describes Model 3395 support for the Xremote protocol.
Chapter 13 Describes Model 3395 support for the Point-to-Point protocol.
Chapter 14 Describes how to configure print services for Novell users.
Chapter 15 Describes how to manage initialization records from the command interface on terminal
servers that support the commands.
Chapter 16 Explains how to enable certain UNIX daemons on the terminal server and describes the
function of each daemon.

Preface
xvi 893-763-A
Chapter 17 Describes how to set up shared printers using the lpd daemon.
Chapter 18 Describes the Nested Menu feature and how to create nested menu files. This chapter
includes two sample nested menu files.
Chapter 19 Describes how to set up connections between a UNIX host and a communication server port
using the csportd daemon.
Chapter 20 Describes how to set up the server to use the SecurID authentication system.
Chapter 21 Describes how to set up the server to support connections using the AppleTalk Remote
Access Protocol (ARAP).
Appendix A Provides listings of “template” C language shared printer filter programs, a BSD UNIX
printcap file, and an AT&T UNIX System V interface file.
Appendix B Lists OPCOM messages that may be displayed by the Model 3395 software, and describes
the cause of the condition.
Appendix C Summarizes the differences between Model 3395 software and the LAT software for a
DECserver 200 terminal server unit.
Appendix D Notes on Local and Remote Parameter Storage.
Conventions
This manual uses the following conventions:
1. Keys that you press on the keyboard are represented using left and right angle bracket characters (< and
>, respectively). For example, the notation <CTRL> means that you press the CTRL key on the
keyboard, <A> means that you press the letter A key, and <Return> means that you press the
RETURN key on the keyboard.
2. The <CTRL> key on the keyboard provides alternate functions when used with some keyboard keys.
Notation such as <CTRL>/<A> indicates that you press both the <CTRL> key and the letter A key at
same time. The terminal server will echo this control character as ^A.
3. Unless otherwise specified, commands are executed when you press the <RETURN> key on the
keyboard.
4. The manual uses the following typographical conventions:
Monospace Typeface indicates text displayed at a terminal (displays, messages,
system responses, etc.).
italics indicates variables in commands and procedures.
5. The following typeface indicates user input in response to system prompts:
TS3395> connect
6. The server prompt for secure users is this:
TS3395>
The server prompt for non-privileged and privileged users is this:
TS3395>>
This is the default terminal server user interface prompt; the server manager can specify a different
prompt, so the prompt in use at your site may be different.

Preface
893-763-A xvii
7. The following default user prompts will be shown (different prompt may be in use at your site):
VMS $
UNIX/ULTRIX %
UNIX/Ultrix Superuser #
DOS C:\
Ordering SynOptics Publications
To purchase additional copies of this document or other SynOptics® product publications, order by part
number from SynOptics Press™ at the following numbers. You may also request a free catalog of
SynOptics Press product publications.
• Phone: [phone]
• FAX: U.S./Canada: 1-800-582-8000, International: 1-916-939-1010
SynOptics Customer Support
For assistance with installing and configuring your SynOpticssystems or for post-installation questions or
problems, contact your local reseller. If you cannot contact your local reseller, call the SynOptics Technical
Response Center (TRC) Contract Hotline.
To contact the TRC Contract Hotline, call:
• U.S. and Canada: 1-800-473-4911
• Europe: 011-31-3480-31616
• Rest of the world: 408-764-1000

Preface
xviii 893-763-A
Technical information is available from the SynOptics InfoFACTS fax-on-demand system by calling:
• U.S. and Canada: 1-800-786-3228
• International: 408-764-1002
You can also access technical information in the SynOptics forum on CompuServe.
For information about our education services, contact the SynOptics Training Coordinator at 1-800-473-
4911 or 408-764-1018.

Chapter 5
Setting Up Modems
893-763-A 5-1
This chapter describes how to configure the terminal server to support several different types of modems. It also
describes how modem control operates. You can use this information for trouble shooting.
This chapter includes information about the following topics:
• Setting up dial-in modems
• Setting up dial-back modems
• Setting up dial-out modem (also dial-in/dial-out modems)
• Modem control operation
• Using signal check
• Flow control
In the examples in this chapter, port options that are a matter of personal preference are not discussed. For
each device type, only the options that must be changed are listed.
Setting Up Dial-In Modems
Dial-in modems provide local access connections to services on the network. Most of the default values for
port characteristics support dial-in modems, but you do need to change the defaults for these characteristics:
• Specify the following modem-related characteristics:
TS3395>> define port 8-12 modem control enabled
TS3395>> define port 8-12 dsrlogout disabled
Some ports can also use concurrent hardware flow control. Refer to the section "Information about
Model 3395 Cabling Methods" for more information.
• Specify the type of access allowed to the port. If you want the port to originate connections only (local
access connections), but not accept connections that originate from a remote location on the network, use
LOCAL access, which is the default.
If you want the port to both originate connections and accept connections which originate on the network,
such as for a modem that can also dial-out, set the port access to DYNAMIC:
TS3395>> define port 8-12 access dynamic
• Specify a DTRWAIT value for the DTRWAIT. Specify the conditions in which the port should assert
the DTR modem control signal. Use the command:
TS3395>> DEFINE PORT n DTRWAIT value