On 8.9.2023 0.55, Ullfig, Roberto Alfredo via radiator wrote:

This is what the process looks like:

/usr/bin/ntlm_auth --helper-protocol=ntlm-server-1

so we're using NTLM v1 correct? Is that the proper way to run ntlm_auth?

That is a proper way to run ntlm_auth. What you could do is to add a flag to ntlm_auth parameters. The flag is: --allow-mschapv2

With this flag it's still possible to use MSCHAP based authentication methods even if older authentication methods are otherwise disabled on the Windows server. For more information, see this:

https://files.radiatorsoftware.com/radiator/ref/AuthByNTLM.html#Domain_AuthByNTLM-3

My understanding is that MSCHAP and MSCHAPv2 always require NTLM v1. Parameter --helper-protocol=ntlm-server-1 sets the method Radiator and ntlm_auth communicate with each other. It determines how the information is formatted between the two and it does not set the NTLM version. For more, see here:

https://www.samba.org/samba/docs/current/man-html/ntlm_auth.1.html

Thanks,
Heikki

--
Heikki Vatiainen
OSC, makers of Radiator
Visit radiatorsoftware.com for Radiator AAA server software
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