With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
alActiveSessionLoginTime
ALTIGA Active Session Login Time
1.3.6.1.4.1.3076.2.1.2.17.2.1.16
time_t value of the concentrator when the session started.
Back to ALTIGA-SESSION-STATS-MIB MIB page.
IPHost Network monitor allows you to monitor alActiveSessionLoginTime 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.