Solved

TELNET and XP Pro

Posted on 2004-05-03
12
1,319 Views
Last Modified: 2012-06-27
Is there anyway to block telnet(port23) using security policies in windows xp.  I know that I am able to filter it at the router using an access list but the network admin for our school does not want to mess with the router.  I want to be able to stop the machines in a room from initiating a telnet session, is this possible in XP Pro without the use of a router, zonealarm...ect??  
0
Comment
Question by:akline34
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
  • 2
  • +3
12 Comments
 
LVL 57

Expert Comment

by:Pete Long
ID: 10977347
Remove telnet.exe from the clients, either manually or by login script :) its in c:\windows\system32

Pete
0
 
LVL 67

Expert Comment

by:sirbounty
ID: 10977364
Think you'll have to block it with a firewall like Zone Alarm...
I'm fairly certain system restore will replace telnet.exe if it 'disappears'...
0
 
LVL 49

Expert Comment

by:sunray_2003
ID: 10977377
How about using ICF instead of zonealarm ?
0
Three Reasons Why Backup is Strategic

Backup is strategic to your business because your data is strategic to your business. Without backup, your business will fail. This white paper explains why it is vital for you to design and immediately execute a backup strategy to protect 100 percent of your data.

 

Author Comment

by:akline34
ID: 10977406
I dont wont to completely remove the application I would just like to be able to disable telnet at login, or only allow it through the use of a password?  Is this possible??
0
 
LVL 57

Expert Comment

by:Pete Long
ID: 10977437
This is an outbound TCP port you want to stop enabling ICF will not help (unless we are in active/passive territory here) what are you ultimately trying to stop them doing? ther emust be some ussue you are trying to stamp on? I think we are approaching this from the wrong Angle, do you want them to stop opening telnet to another server?
0
 
LVL 44

Accepted Solution

by:
CrazyOne earned 63 total points
ID: 10977459
HOW TO: Restrict Users from Running Specific Windows Programs in Windows 2000/XP:
http://support.microsoft.com/?kbid=323525 

http://www.winguides.com/registry/display.php/969/

Restrict Users from Running Specific Applications (Windows 2000/Me/XP) Popular

This tweak can be easily applied using WinGuides Tweak Manager. Download Now!
This setting allows you to specify applications and filenames that users are restricted from running.

Open your registry and find the key [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion \Policies\Explorer]

Create a new DWORD value and name it "DisallowRun" set the value to "1" to enable application restrictions or "0" to allow all applications to run.

Then create a new sub-key called [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion \Policies\Explorer\DisallowRun] and define the applications the are to be restricted. Creating a new string value for each application, named as consecutive numbers, and setting the value to the filename to be restriced (e.g. "regedit.exe").

Restart Windows for the changes to take effect.

Registry Settings
User Key: [HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\
Explorer]
System Key: [HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\
Explorer]
Value Name: DisallowRun
0
 

Author Comment

by:akline34
ID: 10977555
OK- the students in my class are constantly opening a telnet on-line game (SimpleMU) I think is what it is called.  I would like to limit there use of the telnet application if that is possible without completely filtering it from use.  I am familiar wih group/local policies, but I am unaware if what I would like to accomplish is possible.  Ulimately if it gets to bad I will just block the games server IP at the firewall.
0
 
LVL 21

Expert Comment

by:gemarti
ID: 10977557
Why don't you just disable the service.

START | RUN | SERVICES.MSC
Locate the Telnet Service
Disable and Stop it.

If you ever need to use it on a machine you just remotely connect to the machine, start the service and then run it.

The suggestion from CO will disable it for all users, including you.
0
 
LVL 21

Assisted Solution

by:gemarti
gemarti earned 62 total points
ID: 10977565
The other thing to try is to right click on telnet.exe
Select security tab
Remove all groups that the students are members of. This will prevent the application from running when a unauthorized user trys to start the application.
0
 
LVL 44

Expert Comment

by:CrazyOne
ID: 10977625
Glenn what I posted can be done on user basis. Persuming akline34 is using a seperate account then don't block that account from using it.
0

Featured Post

Online Training Solution

Drastically shorten your training time with WalkMe's advanced online training solution that Guides your trainees to action. Forget about retraining and skyrocket knowledge retention rates.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Sometimes people don't understand why download speed shows differently for Windows than Linux.Specially, this article covers and shows the solution for throughput difference for Windows than a Linux machine. For this, I arranged a test scenario.I…
This article provides a convenient collection of links to Microsoft provided Security Patches for operating systems that have reached their End of Life support cycle. Included operating systems covered by this article are Windows XP,  Windows Server…
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…
This is my first video review of Microsoft Bookings, I will be doing a part two with a bit more information, but wanted to get this out to you folks.

690 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question