D-Link NetDefend Intrusion Prevention System (IPS), 1Y, f/DFL-860, 1 year(s) D-Link NetDefend Intrusion Prevention System (IPS), 1Y, f/DFL-860. License term in years: 1 year(s) https://www.alphr.com/d-link/d-link-netdefend-dfl-860/30183/d-link-netdefend-dfl-860-review D-Link claims its NetDefend security appliances are unique: along with a complete UTM solution they offer the Zone Defence feature, which allows them to send commands to xStack switches to stop infections from spreading across the network. The DFL-860 ... D-Link offers an impressive range of security features for the price, but configuration is complex ...