Short answer
Yes. You can connect your own router to a modem/router combo, usually by running an Ethernet cable from one of the combo’s LAN ports to your router’s internet port. How well it works depends on how you configure the two devices.
Why you might add your own router
- Wi-Fi coverage or speed from the combo is lacking
- You want more settings or features
- You want to use mesh or a newer Wi-Fi standard
For background on what the combo is, see gateway vs router.
Option 1: bridge mode
Bridge mode (some gateways call it IP passthrough) turns off the combo’s routing so your router handles the network. This avoids double NAT. Not all combos or providers support it, and the process varies, so use your provider’s or manufacturer’s instructions. Some gateways also change how their Wi-Fi or Ethernet ports behave when bridged, and some providers need to enable it for you.
Option 2: access point mode
You can do the opposite: leave the combo as it is and set your own device to access point mode, so it only adds Wi-Fi. Your combo keeps routing. Not every router has this mode.
Option 3: leave both routing (double NAT)
Plugging a router in and changing nothing often still works for web browsing and streaming. Double NAT can cause problems with some games, port forwarding and remote access to cameras. If you notice such issues, try option 1 or 2.
General connection steps
- Make sure the combo is online.
- Connect an Ethernet cable from a combo LAN port to your router’s internet (WAN) port.
- Power on the router and complete its setup.
- If you are using bridge or access point mode, apply that setting first or afterward as your devices’ instructions direct, since the order differs.
- Give your router’s Wi-Fi a different name than the combo’s, or turn off the combo’s Wi-Fi if your provider allows it, to avoid devices jumping between the two.
Troubleshooting
- No internet on the new router: check the cable is in the WAN port and restart the combo, then the router.
- Slow or odd behavior: look for double NAT (see whether multiple routers affect speed) and consider bridge or access point mode.
- Can’t reach settings: the two devices may use the same default address; change one.
FAQ
Is a modem router combo better? It is simpler and takes less space, but separate devices can be upgraded individually. Neither is better for everyone.
Can I just buy a router and use it? Often yes, but check your provider’s guidance first. If you only have a router and no modem or combo, see can you have a router without a modem.
Can you have two routers connected to a modem? Yes, with correct setup, though it adds complexity. One router is usually easier.
Can you use a router as a modem? No. A standard router cannot translate your ISP’s cable, DSL or fiber signal.