You can login to your shared and reseller hosting account using ssh.
But you must use ssh key to login.
Please follow the method below to do it:
Login the cPanel and choose SSH from security section.
Then select button Manage SSH key
And then select Generate New key
Now fill the form with a strong password. you can take help of password generator.
Now press >> go back >> and authorize the key by click >> Manage
and then authorized the key and go back then Download the key.
You have completed the important server-side task by now.
If you using windows then you need putty download it from here http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
Open putty gen, and click the Load button. and choose the id_rsa key you downloaded.
Now it may ask for Passphrase. Put the strong password you choose on the previous step.
Press OK if any popup open.
Now click the Save private key button to download your private key file.
Finally, it's time to check ssh login
Open Putty, under Connection, click SSH, then Auth.
For the hostname: use your domain name, or server name or shared IP.
And open ticket with us for you ssh port.