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,

Rick
sadlermdAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

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.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
sammySeltzerCommented:
for us at our prganization, our intranet IP ranges are:

10.0.0.0 … 10.255.255.255
172.16.0.0 … 172.31.255.255
192.168.0.0 ....

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")
OR
Request.ServerVariables("REMOTE_ADDR").ToString.StartsWith("172.16.0.0")
OR
Request.ServerVariables("REMOTE_ADDR").ToString.StartsWith("10.0.0.0") Then

...

0
sadlermdAuthor Commented:
works...
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Microsoft IIS Web Server

From novice to tech pro — start learning today.