Wrong count of visits+ the detected IP is not the user's

I don’t understand why I get such low visits number in Piwik, though I know for certain that this number does not make sense at all. I get few hundreds per day while I know for certain, according to other measurements that there are tens of thousands. Any ideas?
Also, I can see that the detected IP numbers are the net supplier’s rather than the IP that the supplier assigned to the user. If so, and most of my users block their cookies, Piwik can’t count properly the visits??

Hi,

If you see your hosts IP address instead of the user’s that means that your server is behind a reverse proxy and you’ll need to change the configuration:
https://piwik.org/faq/how-to-install/faq_98/