Starting the GNS3 version 2.1.10, Solar-Putty is packaged as the default SSH client. However, how to integrate it to GNS3 later? As it was not selected during the GNS3 installation? Follow:
1. Download the Solar Putty application from https://www.solarwinds.com/free-tools/solar-putty. Puty is zipped, therefore after the download has completed, unzip the Solar-PuTTY.exe application file to your preferred application folder. I used the C:\Program Files (x86)\Solar-Putty\ for that.