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RCorley00's avatar
RCorley00
Initiate
May 16, 2022
Solved

Connect ORBI RB753S to AT&T Wifi gateway

I just upgraded from Xfinity to AT&T fiber.  With Xfinity, I had a surfboard modem that was wired to my Orbi RB753S and all works fine.  AT&T installed their wireless gateway, which is also fine.  But I need to fix the dead spots in my house.  Can I connect the Orbi to the AT&T gateway as if it was my old surfboard modem, i.e. ethernet cable to the "internet" port on the orbi?  Should that work, plug and play?  Thanks

  • Can you connect it? Sure. 

    but you'll need (want? ) to fix the double nat it causes. 

    A double nat happens when you cascade more than 1 router.
    https://kb.netgear.com/30186/What-is-Double-NAT
    Fixes? There’s 3 options but only use 1.
    1. Put the modem/gateway in modem only/pass through mode. This disables its routing functions. ATT gateways haven't always worked that well in passthrough mode. 
    2. Leave the modem/gateway in router mode but put the Netgears IP address into its DMZ. This forwards the data to the netgear. You can either leave the modem/gateway’s wireless enabled or disabled. Just make sure its using a different wifi channel to prevent interference
    3. Put the Netgear into access point mode. This disables its routing functions. Wifi/ethernet still works but it does disable some features.
    https://kb.netgear.com/26765/Which-features-are-disabled-on-my-NETGEAR-router-when-it-is-set-to-AP-Mode

3 Replies

  • Can you connect it? Sure. 

    but you'll need (want? ) to fix the double nat it causes. 

    A double nat happens when you cascade more than 1 router.
    https://kb.netgear.com/30186/What-is-Double-NAT
    Fixes? There’s 3 options but only use 1.
    1. Put the modem/gateway in modem only/pass through mode. This disables its routing functions. ATT gateways haven't always worked that well in passthrough mode. 
    2. Leave the modem/gateway in router mode but put the Netgears IP address into its DMZ. This forwards the data to the netgear. You can either leave the modem/gateway’s wireless enabled or disabled. Just make sure its using a different wifi channel to prevent interference
    3. Put the Netgear into access point mode. This disables its routing functions. Wifi/ethernet still works but it does disable some features.
    https://kb.netgear.com/26765/Which-features-are-disabled-on-my-NETGEAR-router-when-it-is-set-to-AP-Mode

    • RCorley00's avatar
      RCorley00
      Initiate

      Thanks.  I still have the two orbi satellites I plan to use.  Does that make any option better than the others?  Is any option preferred from a performance standpoint or should they all work about the same (assuming the gateway works ok in passthrough mode)?