With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ons15501SysDateAndTime
ons15501 Sys Date And Time
1.3.6.1.4.1.1869.11.11.1.25
The date and time of the System. The write will not succeed if the administrative state for NTP (ons15501NTPAdminStatus) is 'enabled'. Setting this attribute will autmatically change values for ons15501TrapLogEntryDateAndTime and ons15501ActAlarmDateAndTime.
Back to ONS15501-MIB MIB page.
IPHost Network monitor allows you to monitor ons15501SysDateAndTime 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.