The URL that works is http://example.com/webpage.aspx?CID=1&MID=12
I know why I get this error and how to fix it my it seems that the person making the request is adding %0D%0A%09%09 for some reason. No where on my site to I add this string to the url. Also the request keeps coming from the same IP address: 188.8.131.52
Some days I can get hundreds of request like this all for different query parameters. Should I ban this ip? When I do a reverse DNS look up it comes up as spider14.yandex.ru which is located in russia.
Any suggestions welcome
[edited by: phranque at 9:59 am (utc) on Nov. 20, 2009] [edit reason] exemplified domains [/edit]