Hi all, First off. I don't have much experience with Nginx. I'll get straight to the point though; Nginx config: user www-data; worker_processes auto; pid /run/nginx.pid; events { worker_connections 2048; multi_accept on; } http { proxy_cache_path /var/nginx_cache levels=1:2 keys_zone=STATIC:10m inactive=24h max_size=10g; upstream server { server blabla (It is correct though, privacy reasons etc); } server { listen 80; server_name (blabla); location / { gzip on; gzip_disable "MSIE [1-6]\.(?!.*SV1)"; gzip_http_version 1.1; gzip_min_length 500; gzip_vary on; gzip_proxied any; gzip_types application/atom+xml application/javascript application/json application/ld+json application/manifest+json application/rss+xml application/vnd.geo+json application/vnd.ms-fontobject application/x-font-ttf application/x-web-app-manifest+json application/xhtml+xml application/xml font/opentype image/bmp image/svg+xml image/x-icon text/cache-manifest text/css text/plain text/vcard text/vnd.rim.location.xloc text/vtt text/x-component text/x-cross-domain-policy text/js text/xml text/javascript; add_header X-Cache-Status $upstream_cache_status; proxy_cache STATIC; proxy_set_header Host $host; proxy_ignore_headers Vary; <- When this enabled, all html pages will cache. If I remove this line, everything but HTML pages are being cached. proxy_cache_key $host$uri$is_args$args; proxy_cache_use_stale error timeout http_500 http_502 http_503 http_504; proxy_pass blabla; } } } I would like that every HTML page gets cached by Nginx even when Vary-headers are being sent by the origin server. Why does Nginx not cache HTML pages when Vary-headers aren't being ignored? I hope you have all the information you need here. Let me know if you need more.