Ethernet connection problems: Arduino DUE +wiznet ioshield A

Hello

I have an Arduino DUE+ Wiznet ioshield A, to provide Ethernet.

I want to make Arduino work as a TCP client, so I wanted to test Telnet client Example.

I use wiznet libraries.

The steps I follow are these:

Laptop:
Set the IP to 10.1.3.1, mask 255.255.255.0
Telnet server: in
Follow this instructions, not creating an account, to make telnet server run in windows.

Arduino DUE:
Modify Telnet Client Example sketch:
Modify Server IP to : laptop IP (10.1.3.1)
Modify IP to 10.1.3.200
Modify MAC address to the one that appear in the ioshield
Modify client.connect to port 23, telnet port
if (client.connect(server, 23)) {

Ethernet Library:No change

I have no SD card on the Ethernet shield.

Arduino DUE is powered from the laptop via USB.

Result is:

Connecting…
Connection failed

Disconnected.

Any guess of what the problem is?
Thanks

Are you connecting via an Ethernet switch or directly using a crossover cable?
Does the telnet server work if you try to connect to it from another PC on the network?

Are you using a library compatible with the w5500 IC? This library is from Wiznet and works ok.

Thanks for the replies,
I conect directly to my PC thanks to a crossover cable.
Libraries I donwloaded from wiznet github.

I have seen that there is a problem with Telnet, I'm not being able to run it in my PC I followed the guide to have it running, but when in cmd I write "telnet" it claims that it is not recognized as a command .

I test with AX1, and I was able to connect, but I have problems when trying to send data from client to server. From server (AX1), to client it seems to work.

I need some help, wich server can I use in my Windows laptop, simple and free one, that allows me to test my Arduino code? Seeing data received from the arduino client, etc.

Thank you

You should look into PuTTY. There is a version for Windows and Linux. It has telnet, ssh, and a couple other protocols.