With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cbgpPeerPrefixDenied
CISCO BGP4 Peer Prefix Denied
1.3.6.1.4.1.9.9.187.1.2.1.1.2
Counter which gets incremented when a route prefix received on this connection is denied or when a route prefix is denied during soft reset of this connection if 'soft-reconfiguration' is on . This object is initialized to zero when the peer is configured or the router is rebooted
Back to CISCO-BGP4-MIB MIB page.
IPHost Network monitor allows you to monitor cbgpPeerPrefixDenied 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.