Shawn, Thanks, I can reproduce this at my home computer for the sites mentioned. The site in which I'm interested in (www.eindhovensdagblad.nl) doesn't give me anything back ! Any suggestions ? Kind regards. Jos Beunk > Hi Jos, > > Here are answers for those 2 sites you mentioned (cnn.com, anp.com) and also > msnbc.com. > > CNN.com Response Headers: > HTTP/1.1 200 OK > Via: 1.0 MYPROXY > Expires: Fri, 25 Apr 2003 11:49:15 GMT > Date: Fri, 25 Apr 2003 11:48:16 GMT > Content-Type: text/html > Server: Netscape-Enterprise/6.1 AOL > Last-Modified: Fri, 25 Apr 2003 11:48:15 GMT > Cache-Control: private,max-age=60 > > Private in the cache-control header means that a public cache must not cache > it and the max-age means that a private cache (like a browser's) must expire > it after 60 seconds. The time difference between the Date and Expires > headers reinforces that 60 second expiration. My guess is that other > objects sent by CNN have similar cache directives. > > > anp.com Response Headers: > HTTP/1.1 200 OK > Via: 1.0 MYPROXY > Date: Fri, 25 Apr 2003 11:50:17 GMT > Content-Type: text/html; charset=ISO-8859-1 > Server: Apache/2.0.44 (Unix) PHP/4.3.1 > Accept-Ranges: bytes > X-Powered-By: PHP/4.3.1 > > This is a cacheable response, however other objects and pages deeper in the > site may have cache-control directives associated with them. I would be > suspicious of this site without further investigation. > > > Another site, msnbc.com (after following their redirects...): > HTTP/1.1 200 OK > Via: 1.0 MYPROXY > Expires: Thu, 24 Apr 2003 23:59:51 GMT > Date: Fri, 25 Apr 2003 11:59:50 GMT > Content-Type: text/html > Server: Microsoft-IIS/5.0 > P3P: CP="BUS CUR CONo FIN IVDo ONL OUR PHY SAMo TELo" > Pragma: no-cache > Cache-Control: private > Accept-Ranges: none > > Similiar to CNN, public cache must not cache but a private cache can unless > it knows about the Pragma header. If it understands the Pragma header then > it won't cache because of the no-cache directive. The content is set to > expire immediately upon loading (with an Expires header set to a date in the > past) so a private cache will never return anything because its content will > already be expired. I would guess that this is also the norm for the > majority of the content on this site. > > Hope that helps! > > -Shawn > > ----- > Shawn R. Quillman > Robert Bosch Corporation RBNA/CIT1.1 > 38000 Hills Tech Drive > Farmington Hills, MI 48331 > (248) 553-1164 (P) (248) 848-2855 (F) > shawn.quillman@xxxxxxxxxxxx > > > -----Original Message----- > From: J.Beunk@xxxxxxxxxxxxxxx [mailto:J.Beunk@xxxxxxxxxxxxxxx] > Sent: Friday, April 25, 2003 4:53 AM > To: [ISAserver.org Discussion List] > Subject: [isalist] Caching configuration and News Site (cnn.com) > > > http://www.ISAserver.org > > > Hello, > > Since a few months we've been using ISA server. One of my clients is > dependant on information published on news sites like: cnn.com, anp.com > etc. He came up with a question for which i can't provide the answer, so I > share it with the group:) > - Are Newssites like cnn.com, anp.com being cached ? > - Does this mean that we don't see the last content of this site but only > the content in the cache > - What is the refresh frequency of the cache ? > > We use the following cache configuration: > - Enabled HTTP Caching - Less frequently (Reduced network traffic is more > important) > > I hope one of you has an answer tho these questions. > > Kind regards, > > Jos Beunk > > ------------------------------------------------------ > List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist > ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp > ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ > ------------------------------------------------------ > Exchange Server Resource Site: http://www.msexchange.org/ > Windows Security Resource Site: http://www.windowsecurity.com/ > Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com > ------------------------------------------------------ > You are currently subscribed to this ISAserver.org Discussion List as: > shawn.quillman@xxxxxxxxxxxx > To unsubscribe send a blank email to $subst('Email.Unsub')