roles/nginx/files/snippets/block-exploits.conf

@@ -0,0 +1,136 @@
+## Block SQL injections
+set $block_sql_injections 0;
+
+if ($query_string ~ "union.*select.*\(") {
+	set $block_sql_injections 1;
+}
+
+if ($query_string ~ "union.*all.*select.*") {
+	set $block_sql_injections 1;
+}
+
+if ($query_string ~ "concat.*\(") {
+	set $block_sql_injections 1;
+}
+
+if ($block_sql_injections = 1) {
+	return 403;
+}
+
+## Block file injections
+set $block_file_injections 0;
+
+if ($query_string ~ "[a-zA-Z0-9_]=http://") {
+	set $block_file_injections 1;
+}
+
+if ($query_string ~ "[a-zA-Z0-9_]=(\.\.//?)+") {
+	set $block_file_injections 1;
+}
+
+if ($query_string ~ "[a-zA-Z0-9_]=/([a-z0-9_.]//?)+") {
+	set $block_file_injections 1;
+}
+
+if ($block_file_injections = 1) {
+	return 403;
+}
+
+## Block common exploits
+set $block_common_exploits 0;
+
+if ($query_string ~ "(<|%3C).*script.*(>|%3E)") {
+	set $block_common_exploits 1;
+}
+
+if ($query_string ~ "GLOBALS(=|\[|\%[0-9A-Z]{0,2})") {
+	set $block_common_exploits 1;
+}
+
+if ($query_string ~ "_REQUEST(=|\[|\%[0-9A-Z]{0,2})") {
+	set $block_common_exploits 1;
+}
+
+if ($query_string ~ "proc/self/environ") {
+	set $block_common_exploits 1;
+}
+
+if ($query_string ~ "mosConfig_[a-zA-Z_]{1,21}(=|\%3D)") {
+	set $block_common_exploits 1;
+}
+
+if ($query_string ~ "base64_(en|de)code\(.*\)") {
+	set $block_common_exploits 1;
+}
+
+if ($block_common_exploits = 1) {
+	return 403;
+}
+
+## Block spam
+set $block_spam 0;
+
+if ($query_string ~ "\b(ultram|unicauca|valium|viagra|vicodin|xanax|ypxaieo)\b") {
+	set $block_spam 1;
+}
+
+if ($query_string ~ "\b(erections|hoodia|huronriveracres|impotence|levitra|libido)\b") {
+	set $block_spam 1;
+}
+
+if ($query_string ~ "\b(ambien|blue\spill|cialis|cocaine|ejaculation|erectile)\b") {
+	set $block_spam 1;
+}
+
+if ($query_string ~ "\b(lipitor|phentermin|pro[sz]ac|sandyauer|tramadol|troyhamby)\b") {
+	set $block_spam 1;
+}
+
+if ($block_spam = 1) {
+	return 403;
+}
+
+## Block user agents
+set $block_user_agents 0;
+
+# Disable Akeeba Remote Control 2.5 and earlier
+if ($http_user_agent ~ "Indy Library") {
+	set $block_user_agents 1;
+}
+
+# Common bandwidth hoggers and hacking tools.
+if ($http_user_agent ~ "libwww-perl") {
+	set $block_user_agents 1;
+}
+
+if ($http_user_agent ~ "GetRight") {
+	set $block_user_agents 1;
+}
+
+if ($http_user_agent ~ "GetWeb!") {
+	set $block_user_agents 1;
+}
+
+if ($http_user_agent ~ "Go!Zilla") {
+	set $block_user_agents 1;
+}
+
+if ($http_user_agent ~ "Download Demon") {
+	set $block_user_agents 1;
+}
+
+if ($http_user_agent ~ "Go-Ahead-Got-It") {
+	set $block_user_agents 1;
+}
+
+if ($http_user_agent ~ "TurnitinBot") {
+	set $block_user_agents 1;
+}
+
+if ($http_user_agent ~ "GrabNet") {
+	set $block_user_agents 1;
+}
+
+if ($block_user_agents = 1) {
+	return 403;
+}

roles/nginx/files/snippets/cache-assets.conf

@@ -0,0 +1,31 @@
+location ~* ^.*\.(css|js|jpe?g|gif|png|woff|eot|ttf|svg|ico|css\.map|js\.map)$ {
+	if_modified_since off;
+
+	# use the public cache
+	proxy_cache public-cache;
+	proxy_cache_key $host$request_uri;
+
+	# ignore these headers for media
+	proxy_ignore_headers Set-Cookie Cache-Control Expires X-Accel-Expires;
+
+	# cache 200s and also 404s (not ideal but there are a few 404 images for some reason)
+	proxy_cache_valid any 30m;
+	proxy_cache_valid 404 1m;
+
+	# strip this header to avoid If-Modified-Since requests
+	proxy_hide_header Last-Modified;
+	proxy_hide_header Cache-Control;
+	proxy_hide_header Vary;
+
+	proxy_cache_bypass 0;
+	proxy_no_cache 0;
+
+	proxy_cache_use_stale error timeout updating http_500 http_502 http_503 http_504 http_404;
+	proxy_connect_timeout 5s;
+	proxy_read_timeout 45s;
+
+	expires @30m;
+	access_log  off;
+
+	include conf.d/include/proxy.conf;
+}

roles/nginx/files/snippets/force-ssl.conf

@@ -0,0 +1,3 @@
+if ($scheme = "http") {
+	return 301 https://$host$request_uri;
+}

roles/nginx/files/snippets/letsencrypt-acme-challenge.conf

@@ -0,0 +1,29 @@
+# Rule for legitimate ACME Challenge requests (like /.well-known/acme-challenge/xxxxxxxxx)
+# We use ^~ here, so that we don't check other regexes (for speed-up). We actually MUST cancel
+# other regex checks, because in our other config files have regex rule that denies access to files with dotted names.
+location ^~ /.well-known/acme-challenge/ {
+	# Since this is for letsencrypt authentication of a domain and they do not give IP ranges of their infrastructure
+	# we need to open up access by turning off auth and IP ACL for this location.
+	auth_basic off;
+	allow all;
+
+	# Set correct content type. According to this:
+	# https://community.letsencrypt.org/t/using-the-webroot-domain-verification-method/1445/29
+	# Current specification requires "text/plain" or no content header at all.
+	# It seems that "text/plain" is a safe option.
+	default_type "text/plain";
+
+	# This directory must be the same as in /etc/letsencrypt/cli.ini
+	# as "webroot-path" parameter. Also don't forget to set "authenticator" parameter
+	# there to "webroot".
+	# Do NOT use alias, use root! Target directory is located here:
+	# /var/www/common/letsencrypt/.well-known/acme-challenge/
+	root /data/letsencrypt-acme-challenge;
+}
+
+# Hide /acme-challenge subdirectory and return 404 on all requests.
+# It is somewhat more secure than letting Nginx return 403.
+# Ending slash is important!
+location = /.well-known/acme-challenge/ {
+	return 404;
+}

roles/nginx/files/snippets/proxy.conf

@@ -0,0 +1,7 @@
+add_header       X-Served-By $host;
+proxy_set_header Host $host;
+proxy_set_header X-Forwarded-Scheme $scheme;
+proxy_set_header X-Forwarded-Proto  $scheme;
+proxy_set_header X-Forwarded-For    $remote_addr;
+proxy_set_header X-Real-IP          $remote_addr;
+proxy_pass       $forward_scheme://$server:$port;

roles/nginx/files/snippets/ssl-ciphers.conf

@@ -0,0 +1,9 @@
+ssl_session_timeout 5m;
+ssl_session_cache shared:SSL:50m;
+
+# intermediate configuration. tweak to your needs.
+ssl_protocols TLSv1.2 TLSv1.3;
+ssl_ciphers 'EECDH+AESGCM:AES256+EECDH:AES256+EDH:EDH+AESGCM:ECDHE-RSA-AES256-GCM-SHA512:DHE-RSA-AES256-GCM-SHA512:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-
+ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AE
+S128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES';
+ssl_prefer_server_ciphers on;