With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cueLoginUsernameFailures
cue Login Username Failures
1.3.6.1.4.1.9.9.420.1.3.1.2
Number of GUI logins rejected for unknown username.
Back to CISCO-UNITY-EXPRESS-MIB MIB page.
IPHost Network monitor allows you to monitor cueLoginUsernameFailures on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.