Dosen't connect to LoRa Iot STATION Kerlink

Hi all,
i have this problem with LoRa Iot STATION Kerlink i try to connect with putty on SSH port 22 but dosen’ t work the response is lost network connection.

In Windows i try ping ip_address and ping working and response OK.

I read this procedure on:
https://www.thethingsnetwork.org/docs/gateways/kerlink/setup.html

How to resolve this problem?

Best Regards

Can you help me???

Best Regards.