How I optimized NGINX configuration for my several websites. NGINX is yet robust and powerful web server. Below is my optimized nginx.conf file.
user www-data;worker_processes 16;worker_rlimit_nofile 787695;pid /run/nginx.pid;events { worker_connections 8192; multi_accept on; accept_mutex off;}http { ## # Map http agents to block all bots ## map $http_user_agent $limit_bots { default 0; ~*(ahrefsbot|alexibot|appengine|aqua_products|archive.org_bot|archive|asterias|attackbot|b2w|backdoorbot|becomebot|blackwidow|blekkobot) 1; ~*(blowfish|botalot|builtbottough|bullseye|bunnyslippers|ccbot|cheesebot|cherrypicker|chinaclaw|chroot|clshttp|collector) 1; ~*(control|copernic|copyrightcheck|copyscape|cosmos|craftbot|crescent|curl|custo|demon) 1; ~*(disco|dittospyder|dotbot|download|downloader|dumbot|ecatch|eirgrabber|email|emailcollector) 1; ~*(emailsiphon|emailwolf|enterprise_search|erocrawler|eventmachine|exabot|express|extractor|extractorpro|eyenetie) 1; ~*(fairad|flaming|flashget|foobot|foto|gaisbot|getright|getty|getweb!|gigabot) 1; ~*(github|go!zilla|go-ahead-got-it|go-http-client|grabnet|grafula|grub|hari|harvest|hatena|antenna|hloader) 1; ~*(hmview|htmlparser|httplib|httrack|humanlinks|ia_archiver|indy|infonavirobot|interget|intraformant) 1; ~*(iron33|jamesbot|jennybot|jetbot|jetcar|joc|jorgee|kenjin|keyword|larbin|leechftp) 1; ~*(lexibot|library|libweb|libwww|linkextractorpro|linkpadbot|linkscan|linkwalker|lnspiderguy|looksmart) 1; ~*(lwp-trivial|mass|mata|midown|miixpc|mister|mj12bot|moget|msiecrawler|naver) 1; ~*(navroad|nearsite|nerdybot|netants|netmechanic|netspider|netzip|nicerspro|ninja|nutch) 1; ~*(octopus|offline|openbot|openfind|openlink|pagegrabber|papa|pavuk|pcbrowser|perl) 1; ~*(perman|picscout|propowerbot|prowebwalker|psbot|pycurl|pyq|pyth|python) 1; ~*(python-urllib|queryn|quester|radiation|realdownload|reget|retriever|rma|rogerbot|scan|screaming|frog|seo) 1; ~*(scooter|searchengineworld|searchpreview|semrush|semrushbot|semrushbot-sa|seokicks-robot|sitesnagger|smartdownload|sootle) 1; ~*(spankbot|spanner|spbot|spider|stanford|stripper|sucker|superbot|superhttp|surfbot|surveybot) 1; ~*(suzuran|szukacz|takeout|teleport|telesoft|thenomad|tocrawl|tool|true_robot|turingos) 1; ~*(twengabot|typhoeus|url_spider_pro|urldispatcher|urllib|urly|vampire|vci|voideye|warning) 1; ~*(webauto|webbandit|webcollector|webcopier|webcopy|webcraw|webenhancer|webfetch|webgo|webleacher) 1; ~*(webmasterworld|webmasterworldforumbot|webpictures|webreaper|websauger|webspider|webster|webstripper|webvac|webviewer) 1; ~*(webwhacker|webzip|webzip|wesee|wget|widow|woobot|www-collector-e|wwwoffle|xenu) 1; } ## # Basic Settings ## access_log off; sendfile on; sendfile_max_chunk 512k; tcp_nopush on; tcp_nodelay on; server_tokens off; reset_timedout_connection on; send_timeout 15; keepalive_timeout 15; client_body_buffer_size 128k; client_max_body_size 50m; client_body_timeout 15; client_header_timeout 15; open_file_cache_valid 3m; open_file_cache max=262565 inactive=5m; types_hash_max_size 2048; server_names_hash_max_size 2048; # server_names_hash_bucket_size 64; # server_name_in_redirect off; limit_req_status 403; limit_req_zone $binary_remote_addr zone=one:10m rate=1r/s; limit_req_zone $binary_remote_addr zone=wp:10m rate=3r/s; include /etc/nginx/mime.types; include common/headers-http.conf; default_type application/octet-stream; ## # SSL Settings ## ssl_protocols TLSv1.1 TLSv1.2 TLSv1.3; ssl_buffer_size 4k; ssl_session_tickets on; ssl_session_timeout 1d; ssl_session_cache shared:SSL:50m; ssl_dhparam /etc/ssl/dhparam.pem; ssl_ecdh_curve prime256v1:secp384r1:secp521r1; ssl_prefer_server_ciphers on; ssl_ciphers 'ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-CHACHA20-POLY1305:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RS$ ## # Logging Settings ## access_log /var/log/nginx/access.log; error_log /var/log/nginx/error.log; open_log_file_cache max=1000 inactive=30s valid=1m; log_format we_log '$remote_addr $upstream_response_time $upstream_cache_status [$time_local] ' '$http_host "$request" $status $body_bytes_sent ' '"$http_referer" "$http_user_agent"'; ## # Gzip Settings ## gzip on; gzip_disable "msie6"; gzip_vary on; gzip_proxied any; gzip_comp_level 6; gzip_buffers 32 16k; gzip_http_version 1.1; gzip_min_length 250; gzip_types application/atom+xml application/javascript application/json application/rss+xml application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml $ # Brotli Settings brotli on; brotli_comp_level 4; brotli_buffers 32 8k; brotli_min_length 100; brotli_static on; brotli_types image/jpeg image/bmp image/svg+xml text/plain text/css application/json application/javascript application/x-javascript text/xml application/xml application/xml+rss text/javascript image/x-icon; ## # Virtual Host Configs ## include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*;}