Have you considered running one of the machines as an NTP server, have the others sync their clock to that? On 4/14/08, Jon Drukman <jsd@xxxxxxxxxxxxx> wrote: > Should I throw an Expires header in there? Yes, explicit 'Expires' headers help squid make smarter decisions. If you know an object is going to be good indefinitely (e.g. a GIF for a logo), then setting a very long expiration date will ensure squid doesn't bother checking with the origin server. You might want to also reconsider 'Cache-Control: max-age=300' Kevin