Thanks but I knew this already.
Webhttrack is the webserver and the webclient, both at the same time, but I
need to have both services running on 2 different machines.
On one side (my NAS) : httrack + webserver (apache/httpd)
On the other side (PC) : webcleint (browser displaying the httrack page from
the NAS.

Webhttrack complains about not finding the LOCAL browser, which is normal
since it runs on my NAS.
I need the NAS to publish the httrack webpage (with apache/httpd) so I can
display it on an external browser (PC)