Frontier Internet Not Working — Fiber & Router Fixes

Applies to: Frontier Fiber and copper internet, Sagemcom and similar gateway models

1. Check the basics: power and lights

1. Confirm the router is plugged directly into a wall outlet — not a power strip — and the power cord is secure at both ends.
2. Check the Power light is on. If it's off, that's the actual problem, not the internet connection itself.
3. Check the Wireless light is on if you're troubleshooting WiFi specifically.

2. Do a full reboot

1. Unplug the router, gateway, or modem completely.
2. Wait 30 seconds.
3. Plug it back in and give it several minutes to fully power up before testing.

3. Wired device connected but no internet

1. Confirm the Ethernet cable is securely connected at both the router and the device.
2. Try a different Ethernet cable if you have one — a bad cable is a more common cause than people expect.
3. Try a different device on the same cable to isolate whether it's the cable, the port, or the device itself.

4. Try a different wireless device

If one device can't connect to WiFi, try logging in with a different phone, laptop, or tablet. If the second device connects fine, the problem is specific to the first device (its saved network settings, drivers, or hardware) rather than your Frontier connection.

5. Adding your own router alongside Frontier's gateway

If you're connecting a business-grade router (like a Cisco Meraki) or a separate mesh system behind Frontier's own gateway, you generally don't need to put the Frontier gateway into bridge mode for basic internet access to work — though it's worth understanding the tradeoff either way:

• Without bridge mode: both the Frontier gateway and your own router perform NAT (double-NAT). This works for normal browsing, but can cause less obvious problems with things like inbound port forwarding or certain cloud-managed devices that expect a more direct connection.
• With bridge mode: your own router gets the public connection directly, avoiding double-NAT — but not every Frontier gateway model (some Sagemcom models in particular) offers a bridge mode option at all.

If your own router or mesh system seems to work fine for everyday browsing but something more advanced isn't working right, double-NAT is worth ruling out before assuming anything else is broken.

6. Your own router doesn't play well with a mesh system behind Frontier's gateway

If a mesh system's satellite nodes have trouble staying connected specifically after switching to Frontier (having worked fine on a previous provider), this is sometimes down to compatibility between that specific router brand and Frontier's gateway rather than a setup mistake. Trying a different router or mesh brand, bridged the same way, has resolved this for some people when the original combination just wouldn't cooperate.