attack to site or hacking?

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hi experts
i log into my web site errors and any things. in my logs there is some referral links or request from russian websites ( with respect for Russians and all people ) that when i check these web sites ,there isn't any link or request to my site.
also i got this error in my log from a russian site:

A parameter named 'p__linq__0' already exists in the parameter collection. Parameter names must be unique in the parameter collection. Parameter name: parameter

what is this? are they hacking my web site?
thanks in advance

Posted 21-Sep-13 3:47am

zinajoonjooni

Updated 21-Sep-13 3:48am

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Mike Meinz 21-Sep-13 10:03am

Block their IP Address ranges in your firewall.

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phil.o · Answer 1 · 2013-09-21T04:04:00

Solution 1

This probably has nothing to do with any hacking attempt of some sort.
It seems to be a well know bug in Entity Framework (described here[^] for example, but you can find numerous of them if you just search for "A parameter named 'p__linq__0' already exists in the parameter collection" in any search engine).

Posted 21-Sep-13 4:04am

phil.o

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zinajoonjooni 21-Sep-13 10:10am

its not my code bug.this error was logged at the same time with request from Russians sites