SLNet telnet server software turns any Microsoft Windows NT, 2000 or 2003 server into a true multi-user system. SLNet enables an unlimited number of users to work invisibly and simultaneously on any Windows server without interfering with one another or the server console user. Additionally, SLNet optimizes the telnet protocol between Radio Frequency (RF) devices and Windows servers.

Telnet Application Features (see below)

• Remote users can work invisibly and simultaneously on the same Windows NT, 2000 or 2003 server without interfering with the server console user.
• Allows unlimited concurrent connections for any device running terminal emulation, including RF devices.
• Users can drop straight into custom applications or access the Common Command Shell.
• Use existing character-based and DOS applications to run multiple users without modification to Windows NT, 2000 or 2003.
• Written in open Internet standards to work with any telnet client. No proprietary client software is required.
• Features two levels of ‘time-out’ including: the clean up of processes when a connection is dropped and inactivity time-outs to log clients off after a specified period of no activity.
• System administrators can include more information such as security warnings for log-on banners through the multi-line banner support.
• Gives administrators the ability to customize the log-on and password prompts.

 Telnet Security (see below)

• Completely preserves Windows security protocols.
• Requires user authentication by the Windows security authority.
• Gives administrators the ability to configure SLNet permissions on a user-by-user basis.
• Restricts log-on rights to users with “log-on locally” permissions.
• Gives users the same permissions as if they were working at the console.
• Allow only specified users to log on via Telnet.
• Restricts log-on rights to specific IP addresses or address ranges.
• Allows the log-on sequence to be encrypted

 Hand Held RF Device Support (see below)

• SLNet RF allows unlimited concurrent RF devices connections.
• Ready for real-time use with any wireless radio frequency (RF) device that supports the telnet protocol.
• Users can simultaneously gain access to Windows NT, 2000 and 2003 hosts.
• Support small screen sizes.
• No extensive application rewrites or the investment of learning new and cumbersome wireless APIs.
• Use existing character-based and DOS applications to run multi-users without modification to Windows NT, 2000 or 2003.

SLNet Telnet Features Defined

 Multiple Console Windows
SLNet allows you to remotely open multiple console windows on the Windows desktop just as you would if you were sitting at the terminal and needed to run some programs simultaneously. This functionality is designed to be reasonably unobtrusive, displaying a menu of the processes as needed, otherwise remaining completely invisible as you work in the active window.

SLnet Terminal Emulation
SLnet provides ANSI terminal sequences (compatible with the VT-100 and VT-220) for cursor positioning and formatted screen handling.

SLclient32
SLclient is a full-featured, secure 32-bit Telnet client for Windows. The SLclient32 provides secure logon for SLNet users. When a user enters his or her user ID and password, SLclient32 encrypts them and sends them to SLNet where they are decrypted.

Access to Windows' Common Command Shell
Users who Telnet into SLNet can have full access to Windows' Common Command Shell. This command shell is the equivalent of the DOS command prompt, with many additional features. Users can also run OS/2 or POSIX applications from the command shell. (SLNet is completely configurable by the administrator, who can choose to disable access to the Command Shell on a user-by-user basis.)

Direct Access to Custom Applications
SLNet offers you the power to define default custom applications for users as soon as they log in.

Security
Users run in their own appropriate security context, with all their own permissions in place, just as if they had logged in from the main console. This completely preserves all Windows' C2 security features.

Secure Logon
SLclient32 encrypts user IDs and passwords for secure logon over the Internet. With SLNet's AuthTypes registry value you can specify the level of encryption (and the encryption protocol) for the entire system, or on a user-by-user basis.

Logging
SLNet leaves a record in the Windows event log every time a user connects or disconnects, along with a record of what process the user executed and the resulting code from that process.

Remote Administration
SLNet can be remotely administered by using the Run command.

Character Mapping
Full 256-character out-bound character re-mapping. For use in re-mapping European character sets where umlauts and other accented characters above 127 are needed. Note: This is out-bound character re-mapping not keyboard re-mapping.

SLNet Security Features Defined
SLNet abides by all Windows security features. It does not alter nor change any security settings or privilege levels set by normal Windows mechanisms.
When a Telnet user logs into your system via SLNet, they must be a valid user that an administrator created using the Windows User Manager or User Manager for Domains. SLNet sets that user's process to run in the security context appropriate to that user. The user then has exactly the same privileges he would have on your machine if they sat down in front of it and logged into the console.

Specific login authentication
Adding flexibility to the use of SLNet RF, you can now decide to only allow specific authentication types (SLClient, NTLM or Clear text) to logon or you can decide to use different combinations (SLClient and Clear text or NTLM and clear text).

Logon by IP address
IP login adds to your security, allowing you to specify the IP address, user name and password for auto logon. SLNet RF allows you to set up an auto logon using a user account and IP address for authentication. With auto logon anybody connecting to SLNet will automatically be logged on without having to enter their user name or password and will be deposited in the shell specified in the configuration screen for your user.

NTLM Authentication
SLNet RF version 4 supports Microsoft’s NTLM Authentication method. When logging on with a client that supports NTLM such as Microsoft default or Net term, you are automatically authenticated with the user name and password you login on your desktop.

Connection Control:

• Only allow specific IP address or IP address range
• Only allow specific SLNet user accounts
• Run the Telnet service on a different port
• Maximum Connections Limit
• Multi-Line Banner Support: For User access warnings
• Maximum Logon Attempts
• Allow Users to wait for connection, or not
• Secure encrypted logon (our client only)
  

Customizable Prompts
Some hackers use programs to randomly search for open ports and for prompts like Logon. To avoid that, SLNet RF gives administrators the ability to customize the log-on and password prompts. For example, administrators can change the SLNet RF prompts, and use “Yes?” instead of Logon.

SLnet telnet for Radio Frequency Devices (RF)

Seattle Lab listened to its radio frequency (RF) customers and is offering specifically tailored features and benefits to meet the needs of the market. This includes all telnet clients located on wireless devices. Install the SLnet Telnet service on your Windows NT/2000 host and your applications are ready for real-time use with any RF device that supports the Telnet protocol a perfect solution for warehousing, manufacturing, grocery stores and more!

SLnet lets you go wireless today, without the hassle of extensive application rewrites or the investment of learning new and cumbersome wireless APIs. SLnet provides more than just simple Telnet access to your applications.

Supports Serial Devices
SLnet functions to provide other serial devices - such as barcode readers, time clocks and cash registers - with a dedicated computer connection. With SLnet running on a Windows NT/2000 server, users can access the server to perform text mode command-line operations and run any character-based application.

Two Levels of Time Out
SLnet contains two new levels of definable “time-out” features. This includes the clean up of processes when connections drop, as well as inactivity time-outs so that clients are logged off after specified periods of no reported activity.

Smaller Screen Sizes
SLnet supports smaller screen sizes, situations where clients do not handle wrapping, and sending larger packets.

SLNet RF telnet software allows:

• Unlimited concurrent connections for any device running terminal emulation, with a hand-held RF device. The only limitation is your system resources.
• Two configurable levels of time-out, including the clean up of processes when connections drop, as well as inactivity time-outs so that clients are logged off after specified periods of no activity.
• Windows NT to turn into a true multi-user system
• Existing character-based and DOS applications run multiple users without modification to Windows NT or 2000.
• Users the ability to drop straight into custom applications or access NT/2000 Common Command Shell.
• users to work invisibly on the NT or 2000 server without interfering with an NT or 2000 console user.
• System administrators to include more information such as security warnings in log-on banners through multi-line banner support.