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The CE Telnet Server

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A lot of folks (even in the CE team) don't realize that Windows CE has a telnet server as an optional component.  This is not something that we see you putting in shipping devices.  It is a very cool tool during your initial development of your platform, however.

If your device is hooked up to platform builder (PB) via a debug connection, you can use the target shell of course.  But I prefer telnet server.  Telnet is just a wrapper around CE's cmd.exe.  CE's cmd has builtin file manipulation commands like WinXP cmd, including the capability to do file redirection and run .bat files.  You can also write your own apps that call wprintf() or scanf() and have them interact across a telnet session.  IPConfig, ping, etc... are tools that are command line based.  Yes, you can run them with a '-d' to have the output redirected to the debug console.  But I find it easier using the standard telnet than having to look at all the windows in PB.  Further, if your device isn't hooked up to PB then you're out of luck on that front.

OK I'm biased here since I wrote the telnet server :).  But most people that start using it don't go back..

To get telnet server, add it to your development only platform.  It's SYSGEN_TELNETD.  There are security concerns with any telnet server, so REMOVE IT BEFORE RTM'ng your platform unless you have a very very good reason not to.  If you want to be lazy (development only!) and remove the password check then add these registry entries.

[HKEY_LOCAL_MACHINE\COMM\TELNETD]
    "UseAuthentication"=dword:0
    "IsEnabled"=dword:1

Happy telneting.  Oh, and if it isn't clear already, this isn't something you probably want to ship.

[Author: John Spaith]

Comments

  • Anonymous
    September 30, 2004
    Pardon me for sounding stupid, but what can you DO by telnetting to a CE device?

    I'm just an end-user, but I'm still curious...

    vern
  • Anonymous
    October 01, 2004
    The comment has been removed
  • Anonymous
    January 01, 2006
    I always see telnetd with disabled authentication. What is necessary to use authentication? I have a persistent registry (not hive based) and verified that it's working. But I see authentication failed after reboot.

    /Helge
  • Anonymous
    March 02, 2006
    The comment has been removed
  • Anonymous
    August 08, 2006
    The comment has been removed
  • Anonymous
    August 14, 2006
    No, I'm afraid there is no telnet client for WinCE - at least that MS provides.  There may (?) be 3rd party options out there.

    [John Spaith]
  • Anonymous
    December 25, 2007
    im a newcomer for wince, i add telnet service in my device which run wince4.2, but when i telnet the device the system prompt me login, but i don't know the user name and password. acording the paper above i add the[HKEY_LOCAL_MACHINECOMMTELNETD]   "UseAuthentication"=dword:0   "IsEnabled"=dword:1in platform.reg file, but it isn't work. anyelse i should do ? thanks for your reply.
  • Anonymous
    December 25, 2007
    the problem above mention has  i search find that CE help tell people how to set usrlist but how can i make the usrlist associate with tht password ,can you give some example,thanks.
  • Anonymous
    December 25, 2007
     i search find that CE help tell people how to set usrlist but how can i make the usrlist associate with tht password ,can you give some example,thanks.
  • Anonymous
    December 26, 2007
    Check out NTLMSetUserInfo (http://msdn2.microsoft.com/en-us/library/aa923576.aspx).  It associates a single user with a password.
  • Anonymous
    December 26, 2007
    RE your initial question:[HKEY_LOCAL_MACHINECOMMTELNETD]  "UseAuthentication"=dword:0  "IsEnabled"=dword:1Do you have telnet server included in your image?  Check for telnetd.dll.  If that doesn't help I'd recommend using one of the newsgroups at http://blogs.msdn.com/cenet/archive/2005/12/05/500181.aspx, since they're monitored by a larger group of people.John
  • Anonymous
    February 23, 2010
    Hi,whats is the default login and password for telnet ? how to change username and passowrd in wince device.Thanks with Regards,Anant
  • Anonymous
    December 14, 2010
    1.Can you tell me how to start the telnet session ?Since I dont have the target device is it possible to use emulator and make virtual connection of emulator and my PC?