When a client with a private IP address logs its visit through a proxy, the private IP address is logged, but not the proxy address that will be much more precious: a visitor log showing an IP address as 192.168.x.x is not very useful...
The attached patch directs Piwik to ignore proxy client IP addresses belonging to private networks, thus replacing them in the log by the true proxy address.
Attachment: Patch as described. For Piwik 1.1.1.
Not exactly: what you propose is a global filtering on the headers NAME. I want to enable those, but filter on their VALUE: I don't like to see RFC1918 addresses in the visitor log...
You'll be able to do this kind of filtering via #2055. This is now planned for 1.3.
Thanks for your reply. Will check in 1.3 ... impatiently awaited.