Thanks for your reply Ivy. I am using this Modem as a PPPoE connection which is default set by ISP. I think PPPoE mode is more secured and I can actively use the firewall. Also I have multiple PCs...

Region : India Model : TD-8817 Hardware Version : V6 Firmware Version : 3.11.2.175_TC3086 HwVer:T14.F7_6.0 ISP : Bharti Airtel Limited Region : India Model : TD-8817 Hardware Version : V6 Firmware...