Hello guys, how are you, thanks for the opportunity to work in this community.

I would like to ask you if there is a DEFAULT SERVER BLOCK that works for some reason as default (eventought it is not registered as)

I have an architecture of a single NGINX machine working as a reverse-proxy to other 600 machines

So when you reach my RP Machine IP Requesting a specific domain it works perfectly.

BUT if I access the RP Machine IP only without any request it redirect to specifc server block (altought it hasn't been defined to do so).
By coincidence or failure in my configuration or an nginx problem I still don't know for sure the reason when I access the IP of my reverse-proxy unfortunately it redirects to the first server-block created inside the sites-enabled folder and not to a folder internals of NGNIX as it should (normally /var/www/html or something like that)

Does anyone know how to fix this error or misconfiguration?

Thanks