topic Re: NDFC 4.1.1g, External Autehentication not working properly. in Nexus Dashboard

NDFC 4.1.1g, External Autehentication not working properly.

dahey — Thu, 30 Oct 2025 10:10:10 GMT

Hi All,

Local users works fine, but we need to use external authentication, our option is only RADIUS or LDAP (=> Windows AD).

RADIUS users can loging to our ND but get only read-only access !? same users/accounts from the same source can login to the old DCNM or directly to the MDS switchecs with correct rights.

LDAP (=> Windows AD) not woriking at all, no matter how we modify the config parameters. (error message: Unable to validate provider. Please check your configuration.)
Applications from other vendors using LDAP works fine in our environment.

Thanks in advance for your advice.
/David

Re: NDFC 4.1.1g, External Autehentication not working properly.

balaji.bandi — Tue, 14 Oct 2025 12:51:50 GMT

For testing, add a different group for READ and ADMIN in LDAP (add test user test-read to the READ Group and test-admin to the ADMIN Group), then test it.

Re: NDFC 4.1.1g, External Autehentication not working properly.

twigs — Wed, 15 Oct 2025 13:55:17 GMT

I have the same problem but with version 3.2.2f,

In this case, to simplify, I am using LDAP port 389 connection. I have created a user in an OU where users have administrator permissions over the domain.

In the Hostname section, I have entered: MyServer.mydomain.com, in Base DN: DC=mydomain,DC=com and in Bind DN: CN=SVC_CISCO-MDS,OU=Service Accounts,OU=Servers,DC=mydomain,DC=com, where SVC_CISCO-MDS is the new user account created.

In Key, I entered the password for the user created, without LDAP Attribute, SSL Disabled, and Filter Type Default.

The user for validation is my nominal domain user that I use for these purposes. I tried with user@domain and domain\user.

The error is the same: Unable to validate provider. Please check your configuration.

I don't know if the data I entered corresponds to what the application expects. I also haven't found any logs to get more information about this.

Re: NDFC 4.1.1g, External Autehentication not working properly.

twigs — Thu, 15 Jan 2026 07:38:14 GMT

Hi Dahey, did you solve the problem?

Thanks

Re: NDFC 4.1.1g, External Autehentication not working properly.

dahey — Thu, 15 Jan 2026 07:51:09 GMT

Hi,
No, the problem is not solved, currently we use local accounts as workaround.
Thx

Re: NDFC 4.1.1g, External Autehentication not working properly.

jauris — Tue, 24 Feb 2026 17:48:21 GMT

In my case it works. I have set LDAP Attribute to "memberOf" and I specified the OU in the Base DN (not sure if this is really necessary). For validation, I only set the user without domain.