Netapp Storage only accessible by Hostname and not by IP Address

[kevinartin]

Hello Netapp Community,

I am having a big challenge that just started a week ago. My Netapp Nearstore storage system Model R200 and version 7.2.4 stopped authenticating clients. Whenever a client would try to access a CIFS share using the IP address of the storage system, it would prompt for username and password and still reject the authenticated user, while if the user used the hostname all is well. Kindly advise on what I need to change or do to resolve this.

Much appreciated.

[aborzenkov]

Use of IP address forces NTLM authentication. It is possible that your organization restricted or blocked NTLM. 

[kevinartin]

Hello aborzenkov

However this has been working for more than 5 years without any issue and no policy or modification has been made on both windows and Storage systems. Unless this is a because of an update from Microsoft. Any other options I can look out for as I am new to storage and not sure how to check on the NTLM authentication configurations.

Regards,

Kevin