NTLM authentication against an NT 4.0 Domain

[Zeno Lee]

I'm trying to authenticate username/passwords against an NT 4.0 Domain. My
client is still using NT 4.0 even with Windows XP clients running Framework
1.1 SP1

I've looked through the 1.1 Framework System.Security namespaces, and
there's nothing I can find that will do this.

How can I authenticate against against NT 4.0 Domains?

 

[Nicholas Paldino [.NET/C# MVP]]

Zeno,

All you have to do is call the LogonUser API through the P/Invoke layer,
and it will let you know if the username/password combination is correct.

Hope this helps.