https://bugzilla.wikimedia.org/show_bug.cgi?id=53806

--- Comment #3 from Toby Negrin <[email protected]> ---
From Mark Bergsma:

Hi Diederik,

On Sep 5, 2013, at 12:13 PM, Diederik van Liere <[email protected]>
wrote:
> We are seeing some odd tagging of Zero traffic where requests are being 
> tagged as Zero traffic while it does not fall within the cidr range of a 
> mobile carrier.
>
> Example:
>
> cp3011.esams.wikimedia.org        198278752        2013-07-30T06:47:59        
> 0.000113249        178.115.XXX.XXX        hit/200        345        GET       
>  
> http://ru.m.wikipedia.org/w/api.php?format=json&search=%D0%A1&action=opensearch&namespace=0&limit=15
>         -        application/json; charset=utf-8        
> http://ru.m.wikipedia.org/wiki/%d0%a8%d0%b2%d0%b5%d1%86%d0%b8%d1%8f        -  
>       Mozilla/5.0 (compatible; MSIE 9.0; Windows Phone OS 7.5; Trident/5.0; 
> IEMobile/9.0; NOKIA; Lumia 610)        de-AT        zero=250-99

[snip]

> P.S.: As the examples show, the issue is not simply the X-Forwarded-For 
> header, as for example for [1], neither 66.54.XXX.XXX, nor 1.38.XXX.XXX is in 
> the ranges of Aircell India, and the Beeline example above comes without a 
> X-Forwarded-For setting.
>
> [1] Here is a recent example for Aircell India:
> cp1046.eqiad.wmnet      4331766631      2013-09-04T06:31:38     0.000135422   
>   66.54.XXX.XXX     hit/200 20      GET     
> http://meta.m.wikimedia.org/wiki/Special:RecordImpression?result=hide&reason=empty&country=IN&uselang=en&project=wikipedia&db=enwiki&bucket=0&anonymous=true&device=unknown
>     -       image/png     http://en.m.wikipedia.org/wiki/Sexy      
> 1.38.XXX.XXX      Mozilla/5.0 (Series40; Nokia206/03.58; Profile/MIDP-2.1 
> Configuration/CLDC-1.1) Gecko/20100401 S40OviBrowser/2.2.0.0.36        en     
>  zero=404-01

Thanks for flagging this. I'll investigate it when I get an opportunity.

I've already looked into the XFF header, which might be the culprit still. We
(almost) always add an XFF header at the start of a request. However,
unfortunately it's not being logged, as the logging program just checks what
headers were received from the client, not what we add in VCL...

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