Double NAT
Double NAT happens when two devices in a row, such as a provider gateway and your own router, both do routing, so your traffic passes through two layers of address translation.
What it means for you
It can cause trouble with remote access to cameras, some games and some smart home features. The usual fix is to put the first device in bridge mode, or to run the second device as an access point.
Guides on this topic
- Use Your Own Router With an Xfinity or AT&T Gateway
Add your own router or mesh behind an Xfinity or AT&T gateway without double NAT: Bridge Mode, IP Passthrough and what changes, from the providers' support pages.
- Mesh Wi-Fi vs. a Traditional Router
When one router is enough and when mesh, extenders or wired access points make more sense.
- How to Choose a Wi-Fi Router
Match a router to your home size, internet plan and devices, with Wi-Fi 6, 6E and 7 explained.
Related terms
← All glossary terms · Search all guides for “Double NAT”
Definitions are short and general. For model-specific details, check your device maker’s own documentation.