Skip to main content
NetApp Knowledge Base

Fpolicy fails to Register on 7-Mode CIFS with KRB5KRB_AP_ERR_MODIFIED due to CrowdStrike

Views:
385
Visibility:
Public
Votes:
0
Category:
data-ontap-8
Specialty:
7dot
Last Updated:

Applies to

  • Data ONTAP 7-Mode
  • CrowdStrike
  • CIFS

Issue

  • Enabling Fpolicy causes latency on CIFS access, the following messages may be seen in etc/messages logs

[fpolicy:cifs.server.errorMsg:error]: CIFS: Error for
server \\<VSERVER>: Error while negotiating protocol with server STATUS_IO_TIMEOUT.
[fpolicy:fpolicy.fscreen.server.connectError:error]: FPOLICY: An attempt to connect to fpolicy server \\<VSERVER> for
policy varonis failed [0xc00000b5].

  • Packet traces show Fpolicy server reporting KRB5KRB_AP_ERR_MODIFIED in response to session setup
    • A Kerberos SMB2 Session Setup Request SMB2 that is encrypted with etype: eTYPE-ARCFOUR-HMAC-MD5 (23) fails with
      KRB Error: KRB5KRB_AP_ERR_MODIFIED

 

Sign in to view the entire content of this KB article.

New to NetApp?

Learn more about our award-winning Support

NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.