With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cpaeWebAuthHostSessionTimeLeft
Cisco Port Access Entity Web Authentication Host Session Time Left
1.3.6.1.4.1.9.9.220.1.9.8.1.4
Indicates the leftover time of the current Web Proxy Authenticated session for this host.
Back to CISCO-PAE-MIB MIB page.
IPHost Network monitor allows you to monitor cpaeWebAuthHostSessionTimeLeft on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco routers right now.