Thank you! with your help and a bit of investigation now I have my Torrent client working with password and I can add “on the fly” torrents from Chrome with Remote Torrent Adder for Chrome plug-in.
I’m going to explain here the procedure for those who wants to do the same or may help them for similar configurations.
First, the Torrent client that i’ve installed haven’t user or password by default. Once you have installed Transmission and you can access to it’s admin web (http://yourwdmycloudIP:9091) the port could be 9092 or any other, you can see where it is configured later.
You’ll need connect by SSH using app like PuTTy:
https://support.wdc.com/knowledgebase/answer.aspx?ID=14946
There is a configuration file (config.json) wich contains user, password, port, and many other configuration parameters of transmission, we need modify this file with the desired parameters.
First of all we should disable Transmission APP in WD MyCloud console (only disable, not uninstall) or disable the service only if you know how to do it. We need it because if the service is running, your changes will be overwritten with the original parameters.
Once you have disabled Transmission, start SSH connection and go to the following path (you can copy-paste, paste with mouse right button in PuTTy) :
cd /mnt/HD/HD_a2/Nas_Prog/Transmission/config/
If you want to see what is in this directory or any other type: ls -als
Now we are going to edit the file config.json, type:
vi settings.json
The file will be appear on the SSH connection, to change to “insert mode” push “i” from your keyboard and escape “Esc” to exit insert mode.
With the keyboard cursor find the line with “rpc-authentication-required”: false, and change to true
Then delete the string in “rpc-password”: "{a5d5b0ef… ", and write your desired password, for example:
“rpc-password”: “mypass001”,
Don’t worry about the encrypted chain, when you re-enable Transmission, will read the configuration file, and when it find the unencrypted pass, will encrypt it automatically. The next time you access to the configuration file after enabling Transmission, you can see your password encripted.
The last one is the user, go to the line with “rpc-username”: “”, and write your desired username, for example:
“rpc-username”: “myCloudUser”,
You could modify any parameter you want (and you know what’s mean) in the file. When you have finished press “Esc” key and then type:
:wq
Then enter. This writes the file and quit from the editor.
Now you can start Transmission from WD MyCloud pannel and test if it works. It shoul show you a windows asking you for your username and password.