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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">That’s a very interesting scenario. I’ve always wondered about that. I wonder if there’s a way that AD admins can track authentications from CUCM cluster and
apply the lock out rules accordingly? <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">---<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Lelio Fulgenzi, B.A.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Senior Analyst, Network Infrastructure<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Computing and Communications Services (CCS)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">University of Guelph<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">519-824-4120 Ext 56354<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">lelio@uoguelph.ca<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">www.uoguelph.ca/ccs<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Room 037, Animal Science and Nutrition Building<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Guelph, Ontario, N1G 2W1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> cisco-voip [mailto:cisco-voip-bounces@puck.nether.net]
<b>On Behalf Of </b>Charles Goldsmith<br>
<b>Sent:</b> Tuesday, August 08, 2017 11:55 AM<br>
<b>To:</b> voip puck<br>
<b>Subject:</b> [cisco-voip] authentication failed alerts<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">So, a question out to the community about how you deal with this issue. If an organization is using Webex Messenger for IM and end-users are connecting Jabber to it, along with phone services and voicemail locally, jabber is setup with
accounts to authenticate to AD locally. SSO is not in the mix.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">When a user's AD password comes up on their expiration and it's changed, they usually forget to update jabber on their laptop, phone and tablets, generating a lot of authentication alerts. Those can be filtered down by adjusting the thresholds.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I'm not an AD guy, but talking with some, when asking about why this activity is not locking out the AD accounts, I was told that CUCM/CUC uses a read-only connection to AD, so it will not lock out the accounts.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Because of that problem, we can't simply disable the alerts, we need to monitor them in case of brute force via MRA.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Any thoughts on a better way to handle this specific scenario? <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I may wind up writing a script to consolidate the email authentication reports into something to give a report on thresholds per user, like John.Doe had 30 authenticaiton attempts in the last hour, Jane.Smith had 15, and Mark.Jones had
650.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks!<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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