With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cshMonProbeTotalRefusedConns
csh Monitoring Probe Total Refused Conns
1.3.6.1.4.1.9.9.508.1.1.2.1.8
This object identifies the number of probes whose connections were refused by the real servers.
Back to CISCO-SLB-HEALTH-MON-MIB MIB page.
IPHost Network monitor allows you to monitor cshMonProbeTotalRefusedConns on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.