With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cntpPeersPeerAddress
cntp Peers Peer Address
1.3.6.1.4.1.9.9.168.1.2.1.1.3
The IP address of the peer. When creating a new association, a value should be set either for this object or the corresponding instance of cntpPeersPeerName, before the row is made active.
Back to CISCO-NTP-MIB MIB page.
IPHost Network monitor allows you to monitor cntpPeersPeerAddress 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.