Avoiding double-NAT when connecting through ISP router

  • Hi,

    I'm trying to figure out what's the best config to have Amplifi obtain its internet connection via my ISPs modem router. Originally I had the ISP modem in bridge mode, however I have connection reliability issues, and have connected a failover 3G USB dongle. Since that doesn't work in bridge mode (xDSL only), I need to route traffic via the modem router.

    There seems to be a few options to avoid double-NAT issues

    • put Amplifi in a DMZ on the modem router
    • DHCP relay from modem router to Amplifi
    • put Amplifi in bridge mode
    • turn off NAT on the modem router??

    Just wondering what the advisable and most network-efficient config would be in this scenario?


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