HTTP with NTLM authentication

Hey guys, I’ve been struggling the last couple of days with this subject. My company works with a .NET web api with NTLM authentication and I need to make the ionic app I’ve developed comunicate with this web api.

I’ve tested GET/POST with Postman and it works perfectly, I get authenticated with no problem but when I try to http from the ionic app the response is always 401 - Unauthorized.

Has anyone been through this problem?

Thanks in advance

EDIT: after several days without success my company decided to migrate the app to Xamarin. Anyway if you find a stable solution for this you’re welcome to share. Thanks.

Same problem here.

In my case we have a rest api exported from navision and I have to connect an Ionic app.

In my case with postman and autenticarion Ntlm with user, password and domain configured the response is always 401

Can someone give any help

Thanks

I don’t even know what NTLM is, but you might want to read some CORS documentation. The key point is that there is a “safelist” of headers that are deemed immune to CORS concerns, and if you are relying on headers outside that list, you need to care about CORS.

Did you solved your problems? I would like to build an app that connects to an IIS with NTLM Authentification.

This is no CORS problem.

I’m sorry to say but at the time I did not manage to find a solution for this.

You’re using NTLM and device dont use NTLM but remember the phone have a wireles connection,
you have this problem for that

you would have to try to establish a type of permission in the authentication to specify http as well or another type of authentication…

Tell me a little, in Xamarin are you using HTTP too?
because if so, can you try to share the code of your http request service compared to that of postman?