I’m new on this field and want know if this software support client IP differentiation in case that client use a web proxy like squid. I know that exist an HTTP header that have the real (and not the proxy) client IP, but, this software catch it??
Piwik currently gives precedence to HTTP_CLIENT_IP (which is the header used by some proxies) over X_FORWARDED_FOR (which is used by others), before falling back to REMOTE_ADDR.
This should not be considered reliable in any case since the headers don’t show the order if mixed proxies are used; also proxies may send “unknown”, forge, or suppress information.