KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q231470: SFU Telnet Security Overview

Article: Q231470
Product(s): Microsoft Windows NT
Version(s): 2.0,4.0 SP3,4.0 SP4
Operating System(s): 
Keyword(s): kbnetwork
Last Modified: 10-AUG-2001

-------------------------------------------------------------------------------
The information in this article applies to:

- Microsoft Windows NT Server versions 4.0 SP3, 4.0 SP4 
- Microsoft Windows NT Workstation versions 4.0 SP3, 4.0 SP4 
- Microsoft Windows NT Services for UNIX Add-On Pack 
- Microsoft Windows Services for UNIX, version 2.0 
-------------------------------------------------------------------------------

SUMMARY
=======



MORE INFORMATION
================

Only users who have the "Log on Locally" permission can gain access to the
Telnet server from the local computer's console. The Telnet server included with
the Services for UNIX Add-On Pack enables users to log on to the server over the
network. Users who have the permission to log on locally can make changes to the
computer over the network as though they were actually working on it locally.
The following groups have the "Log on Locally" permission enabled by default on
computers running Windows NT:

- Administrators
- Everyone
- Guests
- Power Users
- Users

NOTE: We recommend that you deny this permission to the Everyone and Guests
groups.

A Windows NT Server configured as a domain controller is configured by default to
give the following groups the "Log on Locally" permission:

- Account Operators
- Administrators
- Backup Operators
- Print Operators
- Server Operators

The "Access this computer from the network" permission enables a user to connect
to the computer over the network. The following groups have this permission
enabled by default on a computer running Windows NT:

- Administrators
- Everyone
- Power Users

The following groups have the "Access this computer from the network" permission
enabled by default on a Windows NT Server configured as a domain controller:

- Administrators
- Everyone

Although you usually start a Telnet session using a network connection, the shell
is running locally on the computer. The users or groups that connect need to
have the "Log on Locally" permission enabled to gain access to the Windows NT
SFU Telnet server. You can create a Telnet User group that has the "Log on
Locally" permission enabled, and then add each user you want to gain access the
Telnet server.

For additional information about permissions, click the article number below to
view the article in the Microsoft Knowledge Base:

  Q231953 How to Restrict Permissions for Telnet Users w/Services for UNIX

For more information about Windows NT Security, please obtain a whitepaper about
securing Windows NT installations at the following Microsoft Web site:

  http://www.microsoft.com/ntserver/security/exec/overview/Secure_NTInstall.asp

Additional query words: SFU telnetd solar coaster

======================================================================
Keywords          : kbnetwork 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNTW400search kbWinNT400search kbWinNTW400sp4 kbWinNTW400sp3 kbWinNTSsearch kbWinNTS400sp4 kbWinNTS400sp3 kbWinNTS400search kbWinNTServicesUnix kbWinServiceUNIX200 kbWinServiceUNIXSearch
Version           : :2.0,4.0 SP3,4.0 SP4
Issue type        : kbinfo

=============================================================================

THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY.