telnets | User interface to the TELNETS protocol | Telnet library

I wrote a script that telnets to some network equipment and pulls the inventory and places it in a file. I used threading to speed up the script as I have around 160 nodes. I wrote a function that telnets to each node, retrieves the inventory, writes the output to a file, then disconnects the session. The script worked great when I had those three steps under a single function. However, I decided to create a class and break those three steps into different methods. Now when I run the script, it only retrieves data from the first node in the list. I need some help figuring out why the script isn't working.

I am trying to implement a Telnet client in VB.NET. I am following this code as example:

The program I'm implementing works as follows:

1. I click the button "Open Telnet" to open the Telnet session.
2. I write an instruction (string) in the text box on the left and then I click on Button1 to send the message to a Telnet server (an electronic board with an embedded Ethernet port).
3. The answer sent by the Telnet server is displayed in the text box on the left.

The problem I'm having with both the example and the implementation I'm doing is that the messages are displayed delayed. For example, if I send the string 1FFFFFF + vbCrLf I am supposed to receive a message from the server saying Unknown HMI code!. I have checked with Wireshark that the message is sent by the Telnet server just after I sent the instruction with the VB.NET program but it is shown in the text box on the right only if I click Button1 a second time (no matter what is written in the text box on the left).

Could you please tell me if there is something I'm missing in the code?

Below is my code:

I have an excel sheet with parameters that I am trying to export into a text pad.

I have a problem with the basic implementation of telnet client in C#. When I try to connect to the remote computer in local network via command line (telnet 192.168.0.255 23), there are no problems, but with this code, I cannot get for me any logical output
(just chars "??%?? ?? ??'??¬?? ??").

I am working on a "simple" server using a threaded SocketServer in Python 3.

I am going through a lot of trouble implementing shutdown for this. The code below I found on the internet and shutdown works initially but stops working after sending a few commands from the client via telnet. Some investigation tells me it hangs in threading._shutdown... threading._wait_for_tstate_lock but so far this does not ring a bell.

My research tells me that there are ~42 different solutions, frameworks, etc. on how to do this in different python versions. So far I could not find a working approach for python3. E.g. I love telnetsrv (https://pypi.python.org/pypi/telnetsrv/0.4) for python 2.7 (it uses greenlets from gevent) but this one does not work for python 3. So if there is a more pythonic, std lib approach or something that works reliably I would love to hear about it!

My bet currently is with socketserver but I could not figure out yet how to deal with the hanging server. I removed all the log statements and most functionality so I can post this minimal server which exposes the issue:

Ok so here's my problem. I got an array in my "main file" and I need to be able to use that array across other files.

I have a FXML JavaFX Scene with three buttons.

Button 1: Telnet, enter command1 + output Telnet session in TextArea of the JavaFX scene.

Button 2: Telnet, enter command2 + output Telnet session in TextArea of the JavaFX scene.

Button 3: Telnet, enter command3 + output Telnet session in TextArea of the JavaFX scene.

The problem is that after clicking a button, the JavaFX scene freezes when I click a second button.

I've already redirected the output of the Telnet session to the console, but this has the same result. This is the last output in the console:

(110)oxea> #ý

(110)oxea> is the prompt, it is the #ý that are apparently the last characters sent.

If I remove the Telnet action from a button, then it is no problem to click this button after I clicked another with a Telnet action.

If I compile the program the same problem occurs.

I've also tried following: after compiling, I ranthe program two times simultaneously, and as I expected: after I click on a button in the first program, the second program immediatley freezes when clicking a button.

There are no Exeptions thrown, and I can't find any topics which describe and fix this problem.

FXMLController:

I want to connect to a cisco switch via telnet in c#.I want to send commands in cmd with c# and when it asks for password I want to enter it with my program. But my problem is that I can’t send password when it is connected to telnet.And when I used StreamWriter it throws an exception.
Here is my code:

I'm a Java/C programming, struggling to learn Python. (I'm writing in Python 2.4.3 on a Linux machine.) I have a simple program which telnets to a Cisco router, logs in, then captures the config. The router's config is stored in a variable named "output":