With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swPortSecPort
Switch Port Sec Port
1.3.6.1.4.1.171.12.63.3.4.1.3
Indicates the port.
Back to PORT-SECURITY-MIB MIB page.
IPHost Network monitor allows you to monitor swPortSecPort on D-Link device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring D-Link VPN routers right now.