With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
swSingleIPVersion
Switch Single IP Version
1.3.6.1.4.1.171.12.8.1.1.1
This object indicates the version of single IP management supported in the system.
Back to SINGLE-IP-MIB MIB page.
IPHost Network monitor allows you to monitor swSingleIPVersion 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.