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ASP.Net Comparing String IP address with Request.UserHostAddress.ToString()

I'm trying to compare the user IP address with the one in text format like "192.168.1.1".

Request.UserHostAddress.ToString () return string like "fe80::5161:9f74:13bd:960d%9". Definitely those two strings are not same.

How can I compare those two strings (IPs)? I've tried with NameValueCollection. But I dont' know how to make it work.

Could I please get some suggestions? Thank in advance...
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winmyan
Asked:
winmyan
1 Solution
 
KimpzorCommented:
Try this
Request.ServerVariables["REMOTE_ADDR"].ToString();
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Ajay SharmaCommented:
try
HttpContext.Current.Request.UserHostAddress.ToString();
or
HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];

and also try
HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

then compare which code gives you the correct format of IP address.

I IP still comes in different format than let me know.
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winmyanAuthor Commented:
Thank both of you for the comments,

I've tested all.

Request.ServerVariables["REMOTE_ADDR"].ToString();
HttpContext.Current.Request.UserHostAddress.ToString();
HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];  // Come out nothing

They all came out "fe80::5161:9f74:13bd:960d%9" instead of "192.168.1.1". Any hope?
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prairiedogCommented:
Are you using Windows Vista?
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prairiedogCommented:
It seems that you are using either Windows Vista or Windows Server 2008, in which IPv6 is intalled and enabled by default. So when you run the above code, IPv6 address will be returned instead of IPv4 address. Here is an article that will help you to convert an IPv6 address to an IPv4 address: http://aspnet.4guysfromrolla.com/articles/071807-1.aspx
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winmyanAuthor Commented:
Yes, I'm using Windows Vista. It works fine in production environment, because we all use IPV4.
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