Our Community Forum will be shutting down on June 27, 2024. Please visit att.com/support for all your support needs.
Get superfast AT&T Fiber internet
grootfollow's profile

New Member

 • 

1 Message

Sunday, March 6th, 2022 6:52 AM

Double NAT even after setting bgw210-700 in passthrough

Hi,

I have following settings on my bgw210-700

IP Passthrough

Allocation mode - passthrough

passthrough mode - dhcp fixed

passthrough fixed mac address - AA:BB:CC:DD:EE:FF (netgear orbi's Internet port mac address.)

Home Network Status

Device IPv4 Address 192.168.2.1
DHCPv4 Netmask 255.255.255.0
DHCP Server On
DHCPv4 Start Address 192.168.2.2
DHCPv4 End Address 192.168.2.254
DHCP Leases Available 250
DHCP Leases Allocated 3
DHCP Primary Pool Private
Secondary Subnet Disabled
Public Subnet 
Cascaded Router Status Disabled
IP Passthrough Status On (public IP address)
IP Passthrough Address 70.xxx.xx.xx

My orbi settings:

INTERNET PORT

MAC Address AA:BB:CC:DD:EE:FF (same as mac address entered in passthrough settings)
IP Address 70.xxx.xx.xx (same as IP Passthrough address)
Connection DHCP
IP Subnet Mask 255.255.254.0

Domain Name Server 192.168.2.1

ROUTER INFORMATION

LAN Port 
MAC Address AA:BB:CC:DD:EE:FG
IP Address 10.0.0.1
DHCP On

The following tracert shows double NAT

tracert 8.8.8.8

Tracing route to dns.google [8.8.8.8]
over a maximum of 30 hops:

  1     2 ms     2 ms     2 ms  10.0.0.1
  2     3 ms     4 ms     4 ms  dsldevice.attlocal.net [192.168.2.1]

What is missing in my setup to avoid double NAT here? Can someone please help?

Accepted Solution

Official Solution

ACE - Guru

 • 

9.9K Messages

2 years ago

You don't really have a Double NAT situation despite the appearance of both the BGW and the Orbi in the tracert.  If the Orbi has the public IP as its WAN (and yours does) then the BGW is still involved in moving packets but isn't doing NAT.

ACE - Expert

 • 

35.9K Messages

2 years ago

As tonydi says, a hop does not double NAT make.  The Gateway still appears as a hop, it is maintaining a session state, but it is not performing a NAT operation.

Not finding what you're looking for?
New to AT&T Community?
New to the AT&T Community? Start by visiting the Community How-To.
New to the AT&T Community?
Visit the Community How-To.