How to correctly recognize intranet users from internet users (IIS 7)...

Using: C#, .NetFramework 3.5 and 4, IIS 7

I am trying to determine if the user who is navigating to our site is on our intranet.

Here is what I have, and it works when I test it on my development pc - just not 100% sure this is production ready:

string userTryingToLoginToMyWebApp = Request.UserHostAddress;
string serverHostingMyWebApp = Request.ServerVariables["LOCAL_ADDR"];

if (userTryingToLoginToMyWebApp == serverHostingMyWebApp) { // "intranet user..."; }

Thanks in advance,

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Paul MacDonaldDirector, Information SystemsCommented:
I'd just do something like;

If Request.ServerVariables("REMOTE_ADDR").ToString.StartsWith("192.168.0") Then
End If

Where 192.168.0 is the network number for the internal network.

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for us at our prganization, our intranet IP ranges are: … … ....

So, you will have to put those into consideration.

You have may have to do something like:

If Request.ServerVariables("REMOTE_ADDR").ToString.StartsWith("192.168.0")
Request.ServerVariables("REMOTE_ADDR").ToString.StartsWith("") Then


sadlermdAuthor Commented:
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Microsoft IIS Web Server

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