With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ctsiAuthenticationFailure
ctsi Authentication Failure
1.3.6.1.4.1.9.9.740.1.9.3
The total number of times that remote peers authentication failed on this device
Back to CISCO-TRUSTSEC-INTERFACE-MIB MIB page.
IPHost Network monitor allows you to monitor ctsiAuthenticationFailure on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.