Accessing ActiveDirectory through LDAP with .NET

From: Tim Mavers (webview_at_hotmail.com)
Date: 12/22/04 

Date: Tue, 21 Dec 2004 17:16:52 -0600

I am trying to determine the best way I can authenticate against an
ActiveDirectory using LDAP with .NET. I need to use LDAP because I need to
authenticate across the Internet.

Right now I have code that authenticates (e.g. I pass username/password to
it) via NTLM but the problem is I am accessing this via a domain user
account that has access to the domain controller (e.g. it's the account that
IIS is running under).

Obviously this doesn't work over the Internet and the only temporary
solution is for my client to set up a VPN and have a trust relationship,
which is really not something they want to do.

I read somewhere (brief blurb) that I could access this information via
LDAP.

Essentially I am building sort of a single-sign on application where the
user enters their name/password in my app and it is authenticated against an
ActiveDirectory instance.

Any ideas on how I can do this in a secure manner over the Internet without
the need for a VPN?

Thanks,

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