With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
alTelnetStatsInNetCmdOctets
ALTIGA Telnet Statistics In Net Command Octets
1.3.6.1.4.1.3076.2.1.2.11.1.6
The total number of octets that contained Telnet commands or options that were received from the network since the system was booted.
Back to ALTIGA-TELNET-STATS-MIB MIB page.
IPHost Network monitor allows you to monitor alTelnetStatsInNetCmdOctets 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.