Hi. I am trying to understand why my Squid 3.4 refuses to cache some URLs. Here is an example: curl -I http://guard.cdnmail.ru/GuardMailRu.exe HTTP/1.1 200 OK Server: nginx Date: Mon, 21 Apr 2014 05:02:28 GMT Content-Type: application/octet-stream Last-Modified: Fri, 04 Apr 2014 14:34:09 GMT Accept-Ranges: bytes Content-Length: 6779936 X-Cache: MISS from 1 Connection: keep-alive As you see, response does not have explicit lifetime so it should be cacheable based on Last-Modified and refresh_pattern directive. My config is: cache_effective_user proxy acl clients src X.X.X.X/Y acl CONNECT method CONNECT http_access deny CONNECT http_access allow localhost manager http_access deny manager http_access allow clients http_access allow localhost http_access deny all http_port 3128 http_port 3129 tproxy cache_dir ufs /srv/squid3/1 90000 16 256 cache_dir ufs /srv/squid3/2 90000 16 256 cache_dir ufs /srv/squid3/3 90000 16 256 cache_dir ufs /srv/squid3/4 90000 16 256 cache_dir ufs /srv/squid3/5 490000 16 256 store_dir_select_algorithm round-robin maximum_object_size 100 MB coredump_dir /opt/squid/var/cache/squid refresh_pattern ^ftp: 1440 20% 10080 refresh_pattern ^gopher: 1440 0% 1440 refresh_pattern -i (/cgi-bin/|\?) 0 0% 0 refresh_pattern . 0 20% 86400 via off global_internal_static off dns_nameservers 192.168.0.1 dns_v4_first on forwarded_for transparent visible_hostname 1 unique_hostname 1 store_id_program /opt/squid/etc/helpers/storeid /opt/squid/etc/cacheurl.config store_id_children 1 startup=1 idle=1 concurrency=1000 When I repeatedly request aforementioned URL with wget I consistently get TCP_MISS. What am I doing wrong? :) -- Timur Irmatov