With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
h225RasStatsUnregisterRejectIns
Cisco H255 Ras Stats Unregister Reject Ins
1.3.6.1.4.1.9.9.397.1.2.1.35
The number of Unregister rejects received by this entity.
Back to CISCO-H225-MIB MIB page.
IPHost Network monitor allows you to monitor h225RasStatsUnregisterRejectIns 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.