Hello list, I'm configuring a squid 2.6 (can't upgrade) as reverse proxy and i've some questions about how cache works. Here, how my architecture works: AV Client > GET /file.zip (HTTP/1.1 with Cache-Control: max-age=0 and sometimes, with also If-Modified-Since: date, it depends of the file) => Squid configured with refresh_pattern -i \.zip$ 1440 100% 1440 => Apache server with file.zip hosted with a classic configuration If I try to get the file.zip with IE, it seems to work, I first have a TCP_MISS/200 and then TCP_HIT/200. No request to the Apache server. If I try to get the file.zip with the AV Client, I first have a TCP_MISS/200 but then, I always have a TCP_REFRESH_HIT/200, so Squid ask to the Apache server if the file is modified, Apache says 304. I don't want to have this 304 all the time on my Apache but only when the file is older than 1 day. I think it could come from the cache-control: max-age=0 and I've tried all different refresh_pattern configuration, particulary with override-expires but I still have this TCP_REFRESH_HIT Also, all my 404 ou 403 are relayed to the Apache, even if I've put negative_ttl to 15 minutes... So to resume for all that don't want to read: how not to have TCP_REFRESH_HIT all the time and how not to relay 404 or 403 error to the Apache? If someone have an idea, please, do not hesitate! Regards,
