Hi fellows! @jarod5001 @wbk
I have news for you. After some back and forth communication with my new ISP, finally, I managed to communicate directly with a technical staff.
It turns out that they use a CGNAT system to deliver the clients’ IPs through an IP pool where all ports are blocked automatically for external access. And I am in one of their CGNAT pool, hence it is not possible to access ports such as 443, 80 etc., unless I pay for a static IP address.
So, now it is obvious that this issue has nothing to do with the yunohost system. Neverthless, I’d like to thank you again for taking your time and try to help me.
By the way, I would appreciate if you have any suggestions as a work around for this situtation, any suggestion but static IP please. 