Nothing like that under Network Security. So it looks like the feature has been removed from recent firmware versions. Why would they remove it? Strange. Screenshot:

Model : TL-SG2424 Hardware Version : Various Firmware Version : Various ISP : We have 8 TL-SG2424 switches installed, some version 1 and some version 2 hardware. We recently had a rogue DHCP server...

Region : Philippines Model : TL-SG2424 Hardware Version : V1 Firmware Version : ISP : We use a mixture of hard phones and softphones (PC-based SIP clients). For the hardphones, the Voice VLAN...