Lost connection when connecting from Internet

I cannot believe; I was writing a long post but it was not saved; so this time I'll be short;

1 or 2 of June I've installed projeqtor on my home server.
Connection was to localhost; the static IP of the server was not recognized.
From Intranet, everything works like a charm (by the way, great piece of software, so complex !)
From Internet, after login, it gets disconnected in a time frame of 20-30 seconds.

When editing projeqtor config file and changing 127.0.0.1 to local static IP, the login page cannot be found anymore;
Editing mysqld config file, commented # the line bind_address = 127.0.0.1, no success.

What else can I do ?

Sorry to bother; is the answer from this post ?
www.projeqtor.org/en/forum/5-ask-questio...-from-internet#17530