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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72" style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal>Hello<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='mso-margin-bottom-alt:auto;background:white;vertical-align:baseline'><span style='font-size:11.5pt;font-family:"inherit",serif;color:#232629'>I am trying to edit the header of http headers to set the cache_control option to " no-cache" to prevent users from being able to cache the contents even if they are using any type of caching engines. the squid proxy will work in a transparent mode. The traffic is originated from one of our CDNs, also the connection is direct between the clients and the CDN servers, thus the proxy will work in transparent mode with IP spoofing so the in the header the IP address is stays the IP address of the client and not the proxy server. Help is highly appreciated.<o:p></o:p></span></p><p class=MsoNormal style='background:white;vertical-align:baseline'><span style='font-size:11.5pt;font-family:"inherit",serif;color:#232629'>PS: We are an ISP company based in Iraq, Baghdad and we are trying to prevent the clients from caching all HTTP data.<o:p></o:p></span></p><p class=MsoNormal style='background:white;vertical-align:baseline'><span style='font-size:11.5pt;font-family:"inherit",serif;color:#232629'><o:p> </o:p></span></p><p class=MsoNormal style='background:white;vertical-align:baseline'><span style='font-size:11.5pt;font-family:"inherit",serif;color:#232629'>Regards<o:p></o:p></span></p><p class=MsoNormal style='background:white;vertical-align:baseline'><span style='font-size:11.5pt;font-family:"inherit",serif;color:#232629'>Muhanad Abdullah<o:p></o:p></span></p><p class=MsoNormal style='background:white;vertical-align:baseline'><span style='font-size:11.5pt;font-family:"inherit",serif;color:#232629'><o:p> </o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>