Hi everybody,
i’ve been searching for this error for a long time, and now iam in the dead end.

Somehow my piwik is not showing IP adresses anymore.
Every single record (for every domain) shows:

Fri 14 Dec - 13:16:32
Provider: Unknown

Fri 14 Dec - 13:02:25
Provider: Unknown

Fri 14 Dec - 13:02:06
Provider: Unknown

OS/Browser detection looks correct, but empty IP’s and ofcourse Visitors Location.

Found this thread 301 Moved Permanently , but that’s from version 1.3…
I was so depressed that i already dropped all tables and did clean install of piwik. No change.

Did anyone experience the same problem?

and an Error from Geolocation Settings:

There is an error. Please report the message (Piwik 1.9.2) and full backtrace in the Piwik forums (please do a Search first as it might have been reported already!).

Notice: geoip_country_code_by_name() [function.geoip-country-code-by-name]: Host xxx.xx.xx.xx, xxx.xx.xx.xx not found in /data/i/v/xxxxx_1/xxx.xx/web/piwik/plugins/UserCountry/LocationProvider/GeoIp/Pecl.php on line 80

Backtrace -->

#0 Piwik_ErrorHandler(…) called at [:]
#1 geoip_country_code_by_name(…) called at [/data/i/v/xxxxx_1/xxx.xx/web/piwik/plugins/UserCountry/LocationProvider/GeoIp/Pecl.php:80]
#2 Piwik_UserCountry_LocationProvider_GeoIp_Pecl->getLocation(…) called at [/data/i/v/xxxxx_1/xxx.xx/web/piwik/plugins/UserCountry/LocationProvider.php:229]
#3 Piwik_UserCountry_LocationProvider::getAllProviderInfo(…) called at [/data/i/v/xxxxx_1/xxx.xx/web/piwik/plugins/UserCountry/Controller.php:40]
#4 Piwik_UserCountry_Controller->adminIndex(…) called at [:]
#5 call_user_func_array(…) called at [/data/i/v/xxxxx_1/xxx.xx/web/piwik/core/FrontController.php:138]
#6 Piwik_FrontController->dispatch(…) called at [/data/i/v/xxxxx_1/xxx.xx/web/piwik/index.php:53]

see: Installation - Analytics Platform - Matomo

Turned out, problem is caused by hosting provider server architecture, specifically by using nginx.
Thx anyway.

This is a new problem i am hearing now…