Modem or Router First? The Right Restart Order When Internet Fails
First 100 Words Quick-Fix/Triage
Check this first: do you have one combo gateway or separate modem and router boxes?
If you have one gateway, restart that one box. If you have a separate modem and router, restart the modem first, wait for it to come back online, then restart the router.
If the modem or gateway will not come back online, the issue may be modem, ONT, line, account, or ISP-side.
Do not factory reset anything yet.
Contact your provider if the modem, gateway, or ONT stays offline, or if a direct Ethernet test to the modem still fails.
What this symptom usually means
When your internet fails, the restart order matters because the devices do different jobs.
A modem, gateway, or ONT connects your home to the provider side. A router shares that connection with your wired and Wi-Fi devices.
If you have one box from your provider, it may be a gateway. That means the modem and router functions are combined. You restart that one device.
If you have two separate boxes, the common safe order is to restart the modem first. After the modem comes back online, restart the router. This gives the router a working internet connection to pick up.
This is not the same as a factory reset. A restart means unplugging power and plugging it back in. It should not erase your Wi-Fi name, password, or router settings.
A factory reset is different. It can erase important settings and should not be your first move.
Step-by-step troubleshooting checklist
Step 1: Check whether you have one gateway box or separate modem and router boxes.
Step 2: Check that the power cables are firmly connected.
Step 3: Check that the provider cable is connected to the modem, gateway, or ONT.
Step 4: If you have one gateway, unplug its power, wait about 30 seconds, then plug it back in.
Step 5: Wait for the gateway to finish starting up before testing the internet.
Step 6: If you have a separate modem and router, unplug the modem power first.
Step 7: Wait about 30 seconds, then plug the modem back in.
Step 8: Wait until the modem looks online again. Light names and colors vary, so check the label, app, or manual if unsure.
Step 9: After the modem is back online, unplug the router power.
Step 10: Wait about 30 seconds, then plug the router back in.
Step 11: Wait a few minutes for Wi-Fi and wired connections to return.
Step 12: Test the internet on one phone, one laptop, or one wired device.
Step 13: If Wi-Fi still fails but Ethernet works, treat it as a Wi-Fi or router-side problem.
Step 14: If Ethernet directly from the modem also fails, treat it as a modem, line, account, ONT, or ISP-side problem.
Step 15: If you use mesh, restart the main router or gateway first, then restart mesh nodes only if Wi-Fi still does not return.
Only run a direct Ethernet test if your setup allows it. Do not plug into an ONT or change provider equipment unless your provider instructions allow it.
What your results mean
If the internet returns after the modem or gateway restart, do not keep changing settings. Stop and monitor it.
If the modem is online but the router still cannot share internet, check the cable between the modem and router. Also check whether the router app or admin page shows a WAN or internet status warning. Wording varies by router.
If the modem, gateway, or ONT will not stay online, router changes probably will not fix it.
What not to do yet
Do not factory reset the router or modem first.
A factory reset can erase your Wi-Fi name, password, admin settings, and provider-specific setup. Some connections may depend on ISP settings such as PPPoE, VLAN, IPTV, or other account details. Do not erase those settings unless your provider or device documentation tells you to.
Do not change DNS, DHCP, NAT, bridge mode, passthrough mode, or WAN settings during the first restart attempt.
Changing several settings at once makes the problem harder to diagnose.
Do not buy a new router, modem, cable, or mesh system yet.
The issue may be a temporary provider outage, a loose cable, a gateway restart problem, a router handoff issue, or a setup-specific problem.
Do not assume the same restart order applies to every fiber ONT or bridged setup.
For fiber, PPPoE, bridge mode, or ISP-authenticated connections, provider instructions matter. If the ONT or modem status looks abnormal, check the provider app, outage page, or support instructions before changing router settings.
When to contact your provider
Contact your provider when the problem points past your router.
Do that if the modem, gateway, or ONT will not come back online after a safe restart.
Also contact your provider if a direct Ethernet test to the modem or gateway fails. That result can point to the modem, provider line, account, outage, or provisioning branch.
Contact your provider if the provider app shows an outage or account issue.
Before contacting support, write down:
Whether you have one gateway or separate modem and router boxes.
Whether the modem or gateway came back online.
Whether the router came back online after the modem.
Whether Ethernet worked.
Whether Wi-Fi was the only thing still failing.
This saves time and helps support avoid unnecessary resets.
Related HomeNetCompass guides
For broader diagnosis after repeated drops, read Internet Drops Randomly: Router, Modem, Wi-Fi, or ISP?.
If you are not sure which box is which, use Router vs Modem.
For setup basics after your connection returns, read the Router Setup Guide.
FAQ
Should I restart my modem or router first?
If you have separate modem and router boxes, restart the modem first, wait until it looks online again, then restart the router. If you have one gateway box, restart that one device.
Does restarting erase my Wi-Fi settings?
No. A normal restart or power cycle should not erase your Wi-Fi name, password, or settings. A factory reset is different and can erase settings.
What if I have a gateway instead of a modem and router?
Restart the gateway as one device. A gateway combines modem and router functions in one box.
Should I restart my ONT too?
Do not assume one universal ONT restart order. If you have fiber and the ONT looks offline or abnormal, check your provider instructions or contact support.
When should I stop restarting and call my ISP?
Call your ISP if the modem, gateway, or ONT will not come back online, if direct Ethernet to the modem still fails, or if your provider app shows an outage or account issue.
Final takeaway
If you have one gateway, restart that one box. If you have a separate modem and router, restart the modem first, wait until it comes back online, then restart the router. Do not factory reset early. Contact your provider if the modem, gateway, ONT, or direct Ethernet test still fails.