How to check IPAddress is proxy address or not using C# in ASP.Net

Refer the below links.

http://stackoverflow.com/questions/6681024/user-ip-address-using-proxy-or-not-some-help

https://www.hanselman.com/blog/AnIPAddressBlockingHttpModuleForASPNETIn9Minutes.aspx

Thanks for the reply.

I am looking for that if users are using proxy ip or use proxysite.com to access my site so they should not be able to access it.

Because they are creating load on the site by using proxy ip and proxysite.com

is there any way to find that if user is hiding behind proxy so visitor cannot access my site

From the above link you are able to check the address is proxy or not. If it is proxy then send them to some error page.

i tried the above code but it is not working for me can you create a demo and check, because i am unable to find the real ip and proxy ip.

please help thanks

Refer the below link for proxy details.

https://msdn.microsoft.com/en-us/library/system.net.webproxy.getproxy%28v=vs.110%29.aspx

https://msdn.microsoft.com/en-us/library/system.net.webproxy.address%28v=vs.110%29.aspx