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Network error Windows cannot access UNC

CycleDude 61 Reputation points
2022-02-09T01:47:53.387+00:00

Hello. I have an issue as follows... I have NetApp resources hosting a few CIFS shares, I am able to access, navigate to the shares by using its NetBIOS UNC path such as \netapname\sharename from some Windows Server 2008 VMs, but there are others where it through an error Windows cannot access \netappname, but ironically, if I use the IP address, it gets there, and I can view the folders with no issues. But using the UNC name it just does not work.. Weird. Thing is that the application relies on and uses the UNC name mapping and obviously using the IP is not an option in this case. Any help is much appreciated.

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  1. Karlie Weng 16,431 Reputation points Microsoft Vendor
    2022-03-14T08:05:44.873+00:00

    Hello @CycleDude

    SMB will use NTLMv2, by default, when using an IP address in the UNC path or the system is not domain joined;
    SMB will try to use Kerberos authentication when a hostname is used and the system is domain joined, In this case Look at the Kerberos traffic on TCP port 88 to make sure there are no Kerberos errors when getting the token.

    Best Regards
    Karlie

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