On 11/08/2013 08:36 AM, Alfredo Rezinovsky wrote: > With squidclient mgr:info I get a "Number of clients accessing cache:" > > This number is always bigger than the different IP addresses in my > access log. I know I can have If you are using multiple workers, please see http://wiki.squid-cache.org/Features/CacheManager#SMP_considerations If you are not using multiple workers, the corresponding table entry at the above URL may still contain useful information for you. > Squid is using the user agent, the X-Forwarded-For or something else to > distinguish one client with another? If I interpret the code correctly, Squid is using the source IP address of the client connection rather than the XFF header value. Please note that ICP clients may also be counted. HTH, Alex.