With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cikeTunRemoteName
Cisco IKE Tunnel Remote Name
1.3.6.1.4.1.9.9.171.1.2.3.1.9
The DNS name of the remote IP address of IPsec Phase-1 IKE Tunnel. If the DNS name associated with the remote tunnel endpoint is not known, then the value of this object will be a NULL string.
Back to CISCO-IPSEC-FLOW-MONITOR-MIB MIB page.
IPHost Network monitor allows you to monitor cikeTunRemoteName on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.