Dear Expert, I'm using: - Squid Cache: Version Squid Cache: Version 2.7.STABLE6 My question is. When i put the following headers to (my iis 6.0 )web site cache-control stale-if-error=1800, stale-while-revalidate=600 squid always misses asp pages here is the refresh pattern from squid refresh_pattern -i www\.xxxxxxxx\.xxx\/ 180 100% 320 reload-into-ims override-expire ignore-no-cache ignore-private override-lastmod ignore-reload thanks in advance