Secure Moodle on Raspberry Pi Model 2, Gentoo Linux and Nginx server

Hi,

I want to share my experiences when I installed Moodle on a Raspberry Pi Model 2 hardware, on which is running Gentoo Linux operating system and the Nginx web server. It can reach here: [1]

First I installed Gentoo Linux on my Raspberry Pi Model 2 hardware by following this guide: [2]

Then I installed and did setup Nginx web server by following these guids: [3] [4]

My nginx.config file is: user nginx nginx; worker_processes 1;

error_log /var/log/nginx/error_log info;

events {

       worker_connections 1024;
       use epoll;

}
http {

       include /etc/nginx/mime.types;
       default_type application/octet-stream;

       log_format main
       '$remote_addr - $remote_user [$time_local] '
       '"$request" $status $bytes_sent '
       '"$http_referer" "$http_user_agent" '
       '"$gzip_ratio"';

       client_max_body_size 15m;
       client_header_timeout 10m;
       client_body_timeout 10m;
       send_timeout 10m;

       connection_pool_size 256;
       client_header_buffer_size 1k;
       large_client_header_buffers 4 2k;
       request_pool_size 4k;

       gzip off;

       output_buffers 1 32k;
       postpone_output 1460;

       sendfile on;
       tcp_nopush on;
       tcp_nodelay on;

       keepalive_timeout 75 20;

       ignore_invalid_headers on;

       index index.html index.php;

       add_header Strict-Transport-Security "max-age=15768000; includeSubDomains" always;

       server {
               listen 443 ssl http2;
               listen [::]:443 ssl http2;

               server_name www.cspl.hu;

               root /var/www/localhost/htdocs;
               location = /KisTechTavOktKulcsosPicike.ico {
               log_not_found off;
               access_log off;
               }

               ssl_certificate /etc/ssl/certs/chained.pem;
               ssl_certificate_key /etc/ssl/private/domain.key;
               ssl_session_timeout 5m;
               ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
               ssl_ciphers ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-S

HA384:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-
AES256-SHA:DHE-RSA-AES128-SHA:EECDH+CHACHA20:EECDH+AES128:RSA+AES128:EECDH+AES256:RSA+AES256:EECDH+3DES:
RSA+3DES:!MD5;

               ssl_session_cache shared:SSL:50m;
               ssl_dhparam /etc/ssl/certs/dhparam.pem;
               ssl_prefer_server_ciphers on;

               access_log /var/log/nginx/localhost.access_log main;
               error_log /var/log/nginx/localhost.error_log info;

               access_log /var/log/nginx/localhost.ssl_access_log main;
               error_log /var/log/nginx/localhost.ssl_error_log info;

               location ~ [^/]\.php(/|$) {
               fastcgi_split_path_info ^(.+?\.php)(/.*)$;
               if (!-f $document_root$fastcgi_script_name) {
               return 404;
               }
               
               fastcgi_pass unix:/var/run/php-fpm/php-fpm.sock;
               fastcgi_index index.php;
               include fastcgi_params;
               include fastcgi.conf;

               location /dataroot/ {
               internal;
               alias /var/www/localhost/moodle/; # ensure the path ends with /
               }
               
               location /moodlelib/ {
               internal;
               alias /var/www/localhost/htdocs/moodle/lib/; # ensure the path ends with /
               }
               
               location /moodlepix/ {
               internal;
               alias /var/www/localhost/htdocs/moodle/pix/; # ensure the path ends with /
               }

               location /moodletheme/ {
               internal;
               alias /var/www/localhost/htdocs/moodle/theme/; # ensure the path ends with /
               }

               server {
                       listen          80;
                       listen          [::]:80;
                       server_name     www.cspl.hu;
                       return          301 https://$server_name$request_uri;
               }

}

I obtain a certificate from here: [5]

My fastcgi.config file is: fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name; fastcgi_param QUERY_STRING $query_string; fastcgi_param REQUEST_METHOD $request_method; fastcgi_param CONTENT_TYPE $content_type; fastcgi_param CONTENT_LENGTH $content_length;

fastcgi_param SCRIPT_NAME $fastcgi_script_name; fastcgi_param REQUEST_URI $request_uri; fastcgi_param DOCUMENT_URI $document_uri; fastcgi_param DOCUMENT_ROOT $document_root; fastcgi_param SERVER_PROTOCOL $server_protocol; fastcgi_param REQUEST_SCHEME $scheme; fastcgi_param HTTPS $https if_not_empty;

fastcgi_param GATEWAY_INTERFACE CGI/1.1; fastcgi_param SERVER_SOFTWARE nginx/$nginx_version;

fastcgi_param REMOTE_ADDR $remote_addr; fastcgi_param REMOTE_PORT $remote_port; fastcgi_param SERVER_ADDR $server_addr; fastcgi_param SERVER_PORT $server_port; fastcgi_param SERVER_NAME $server_name;

PHP only, required if PHP was built with --enable-force-cgi-redirect

fastcgi_param REDIRECT_STATUS 200;

My fastcgi_params file is: fastcgi_param PATH_INFO $fastcgi_path_info;

fastcgi_param QUERY_STRING $query_string; fastcgi_param REQUEST_METHOD $request_method; fastcgi_param CONTENT_TYPE $content_type; fastcgi_param CONTENT_LENGTH $content_length;