The eero Outdoor 7 is an access point that depends on an eero gateway elsewhere in the house, so a double NAT on a network that includes an Outdoor 7 is never caused by the Outdoor 7 itself. Double NAT means two devices are both acting as routers, usually the eero gateway sitting behind the internet provider's own router, which makes the eero app report Double NAT and makes games, calls and port forwards unreliable.
The checks in more detail
eero's own guide explains that you fix it by putting the provider's box into bridge or passthrough mode, so the eero gateway gets the public address, or by putting the eero into bridge mode if the provider's box must stay as the router, accepting that eero's security and parental features then stop working. Before doing either, identify which device is the gateway, because the Outdoor 7 can never be one: it has one Ethernet port, which receives power and data from the network side.
If someone plugged the Outdoor 7 straight into a modem, that explains odd results. Check what the eero app says under Settings, Network settings, DHCP and NAT: Automatic mode lets eero choose, and an old Bridge setting might still be on from an earlier fix. Look at the gateway's WAN address in the app and compare it with the public address shown on a what-is-my-IP site; if the gateway's address starts with 192.168, 10 or 172.16 to 172.31, there is a router in front of it.
Then make the change on the provider's box using its manual or the provider's support, restart the modem and then the eero, and recheck the app. A provider that uses carrier-grade NAT gives a private-looking WAN address even without a router in front, and only the provider can change that. The Outdoor 7 itself needs no settings change; once the gateway is right, it carries on working.
Differential
Likely causes of “eero Outdoor 7 shows double NAT or strict NAT”, and how to tell them apart
- 1
The eero gateway behind a provider router
What separates it The app reports Double NAT
How to confirm Put the provider box into bridge or passthrough
- 2
A provider box that cannot bridge
What separates it There is no passthrough option
How to confirm Put the eero into bridge mode
- 3
An old bridge setting
What separates it Features are missing
How to confirm Set DHCP and NAT to Automatic
- 4
The Outdoor 7 plugged into the modem
What separates it Odd results
How to confirm Connect the gateway to the modem instead
- 5
Carrier-grade NAT
What separates it The WAN address looks private
How to confirm Ask the provider
Before you touch a setting
Record this first — changing settings destroys the evidence
- Which device is the gateway
- The gateway's WAN address
- The provider router model
- The DHCP and NAT setting
Try in this order
0 of 6 completedFind the gateway
ReversibleIn the eero app.
Read the WAN address
ReversibleAnd compare with the public one.
Bridge the provider box
ReversibleOr bridge the eero.
Set DHCP and NAT
ReversibleTo Automatic if bridged before.
Restart modem then eero
ReversibleAnd recheck.
Leave the Outdoor 7 alone
ReversibleIt needs no change.
Model-specific
What is true of this model and not of its siblings
- Not a router
- The Outdoor 7 is an access point.
- WAN address
- A private range means another router.
Stop boundary
When this stops being a self-service repair
- !If the provider box cannot bridge and you need eero features, ask about a modem-only service
- !If the WAN address is private on a modem-only connection, ask the provider about carrier-grade NAT
- !Contact eero support for help reading the address
Evidence ledger
Sources behind this answer
Bridge mode and double NAT on an eero network.
Owners' steps for a double NAT on eero.
Reservations and port forwarding in the eero app.
The Outdoor 7's PoE+ power, 2.5 Gigabit port and weather rating.
Exact questions
Common questions
Does the Outdoor 7 cause double NAT?+
No, it is not a router.
How do I fix double NAT?+
Bridge the provider box or the eero.
What does bridge mode cost me?+
eero's security and parental features.
What is carrier-grade NAT?+
The provider shares one public address between customers.