NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.

Forum Discussion

MikeMike's avatar
MikeMike
Aspirant
May 28, 2018

Nighthawk M1 (MR1100) / DD-WRT Double NAT

Hi All,   I am experieincing a double NAT condition with my Nighthawk M1 in IP pass through mode as described in this post: https://community.netgear.com/t5/Nighthawk-WiFi-Routers/Nighthawk-M1-MR...
Before You Buy
Features
Firmware
Mobile Routers
Share
TheEther's avatar
TheEther
Guru
May 28, 2018

According to the manual, there is a IP Passthrough option.  Go to SETTINGS > Setup > Router Setup to enable it.

MikeMike's avatar
MikeMike
Aspirant
May 28, 2018
Thanks for the reply. I'm already in IP passthrough mode on the M1 and the WAN interface on the DD-WRT successfully gets the internet facing IP, gateway and DNS. The problem seems to be that that doesn't disable the NAT on the M1 and double NAT results... That's what I'm trying to solve.

Thanks,

Mike.
  • TheEther's avatar
    TheEther
    Guru
    May 28, 2018

    Most mobile Internet providers use CGNAT.  If your Internet facing IP is any of the following, then it's not a public IP address.  You won't be able to avoid double NAT.

    • 192.168.x.x
    • 10.x.x.x
    • 172.16.x.x through 172.31.x.x
    • 100.64.x.x through 100.127.x.x