With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cssgServiceType
cssg Service Type
1.3.6.1.4.1.9.9.260.1.3.1.1.3
This attribute indicates the type of service. pass-through - Indicates that the user authentication is not done during logon to this service. This is the default. tunnel - Indicates that this is a L2TP tunneled service. proxy - Indicates that the SSG performs user authentication during logon to this service.
Back to CISCO-SSG-MIB MIB page.
IPHost Network monitor allows you to monitor cssgServiceType on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.