@JBKB 

your att modem sounds more like a gateway. Most gateways allow you to set it in modem only mode or some type off pass thru or bridge mode which allows you to use the tp link router in router mode.

  @JBKB what is the model of your AT&T modem?

  @nunyabiziz 

BGW 320-500

  @JBKB okay, you have 2 options. Ip pass-through if you would like to maintain the same ip on the Tplink router. Other option is to enable DMZ in the BGW-320. Choose whichever suits your needs. Next unless you really want to get into the weeds, your router(tplink) dhcp server needs to NOT be on a 192.168.1.x. ip range. Take close notes on my last statement. You can set your router to anything else but not 192.168.1.x, few examples(10.0.0.x, 192.168.2.x, 192.168.50.x). Last step, disable all settings under firewall advanced and packet filter on the bgw-320, apply, save, REBOOT. Finally, after you have applied settings and the rebooting of the bgw-320 complete and back online, reboot the tplink router and test your results. If you completed all steps properly and are still having strict on the console, apply port forwarding for the required ports for the console on the tplink router. FYI, these methods are not the only way to achieve your goal, just my suggestions. Hope this helps.