server {
        listen 443;
        server_name cm.example.com pdf.example.com;

        ssl on;
        ssl_certificate /etc/nginx/ssl/example.com/wildcard.example.com.pem;
        ssl_certificate_key /etc/nginx/ssl/example.com/wildcard.example.com.key;

        access_log /var/log/nginx/cm.example.com.access.log;
        error_log /var/log/nginx/cm.example.com.error.log;

        location / {
                proxy_pass         https://192.168.0.1:8443/;
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection 'upgrade';
                proxy_set_header Host $host;
                proxy_cache_bypass $http_upgrade;
                proxy_intercept_errors on;


                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $remote_addr;
                proxy_redirect off;
                client_max_body_size 10m;
                client_body_buffer_size 128k;

                proxy_buffer_size 4k;
                proxy_buffers 4 32k;
                proxy_busy_buffers_size 64k;
                proxy_temp_file_write_size 64k;


                error_page 301 302 307 = @handle_redirect;

        }

        location @handle_redirect {
                set $saved_redirect_location '$upstream_http_location';
                proxy_http_version 1.1;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header Connection 'upgrade';
                proxy_set_header Host $host;
                proxy_cache_bypass $http_upgrade;


                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $remote_addr;
                proxy_redirect off;
                client_max_body_size 10m;
                client_body_buffer_size 128k;

                proxy_buffer_size 4k;
                proxy_buffers 4 32k;
                proxy_busy_buffers_size 64k;
                proxy_temp_file_write_size 64k;

                # If IP exists just proxy pass
                if ($saved_redirect_location ~* "192.168.0.1") {
                        proxy_pass $saved_redirect_location;
                }

                # If IP doesnt exist append it first
                if ($saved_redirect_location !~* "192.168.0.1") {
                        proxy_pass https://192.168.0.1:8443/$saved_redirect_location;
                }
        }
}