I am trying to extend my home wifi using an Airport Extreme as base station plus an Airport Express as the extender. I have my base station setup for DHCP and NAT. Unfortunately, my ISP is Spectrum (Time Warner) and the equipment they installed is a modem+router combination so I get a Double NAT error with this configuration. I tried eliminating the Double NAT by changing the base station to "bridge-mode" but when I do this the Airport Express no longer works as an extender. Is my only option to have Spectrum send someone to set their device to "bridge-mode" or would that even apply here?