Multi-Site Issue after Migrating to NGINX

Your server blocks are probably not set up correctly to not redirect requests for those other sites. See if the accepted answer here gives you better guidance.

bcworkz, I am an utter newbie. A mere Padawan learner, oh Jedi Master!

Here is the server block for

***start***

server {
        listen 80;
        listen [::]:80;

        root /var/www/html/c3/c3summitllc.com;

        # Add index.php to the list if you are using PHP
        index index.html index.htm index.nginx-debian.html index.php;

        server_name c3summitllc.com www.c3summitllc.com;

        if (!-e $request_filename) {
            rewrite /wp-admin$ $scheme://$host$uri/ permanent;
            rewrite ^(/[^/]+)?(/wp-.*) $2 last;
            rewrite ^(/[^/]+)?(/.*\.php) $2 last;
        }

        location / {
                try_files $uri $uri/ /index.php?$args;
        }

        # pass PHP scripts to FastCGI server
        #
        location ~ \.php$ {
                include snippets/fastcgi-php.conf;
        #       # With php-fpm (or other unix sockets):
                fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
        }
}

***end***

This block needs to accomplish three things:

All requests to domain should redirect to another domain

All requests to these paths must open the individual multi-sites (there are two different sites):

These URLs do not work correctly, they are supposed to be sites in themselves:

How would I configure this to work properly now?

Multisites seem to work best in a more narrow config.

I’d probably lose the Nginx in favor of Apache where I know I can make a multisite behave. Multisite loves htaccess and Nginx needs the htaccess ‘toys’ placed in its config instead.

You can later use Nginx for a nice proxy out in front of that multisite… or you can just use Cloudflare instead!

Nothing wrong with Nginx… I love the hosts who give you Apache with an Nginx out front pre-configured as a proxy box.