How to Set Up a New Router, Step by Step
Short answer
Power down the modem, connect the new router's WAN or Internet port to the modem with ethernet, then power the modem first and the router second, waiting for each to settle. Join the setup network printed on the router's label, open the setup page or app, and change the admin password before anything else. The whole process takes 15–20 minutes.
On this page
Router setup goes wrong in one of two places, and neither of them is the setup wizard. It is the physical order of plugging things in, and the handful of defaults people leave untouched because the wizard said “You’re all set”.
Before you unplug anything, find two things: the Wi-Fi name and password you are currently using, and whether your connection needs a provider username and password. Cable and fibre almost never do. DSL almost always does, and hunting for it after you have dismantled the working setup is an unhappy evening.
What to gather first
| Item | Where it is | Needed when |
|---|---|---|
| Current Wi-Fi name and password | Router label, or a connected device | Always, if you want devices to rejoin silently |
| Provider username and password | Your account paperwork or provider portal | DSL and some fibre connections |
| New router’s default login | Label on the base of the unit | Always |
| An ethernet cable | In the box | Always |
If you cannot find the current Wi-Fi password, your existing devices still have it — reading back a saved Wi-Fi password covers how to get it off a Windows PC or phone before you change anything.
Connect it in this order
The order matters because the modem learns the hardware address of whatever is plugged into it and will often keep handing the connection to that device until it is properly restarted.
- Unplug the modem from power. Not the reset button, the power cable. If your modem has an internal battery, remove it.
- Unplug the old router and disconnect its cables.
- Connect the new router’s WAN port to the modem. The WAN port is usually a different colour and sits apart from the numbered LAN ports. It may be labelled Internet instead. This is the single most common setup mistake.
- Plug in the modem. Wait until its lights are steady, typically 2–3 minutes.
- Plug in the router. Wait another 2 minutes for it to boot fully.
If your provider gave you a combined modem-router and you are adding your own router behind it, the provider box needs to go into bridge mode or you will end up with two routers doing NAT. That produces a working but subtly broken network where some apps, games and VPNs fail for no visible reason.
Run the setup
Every vendor does this differently, but the shape is the same.
Join the setup network. The router broadcasts a temporary Wi-Fi network with the name on its label, or you connect a laptop to a LAN port with ethernet.
Open the setup interface. Either the vendor’s app, or a browser pointed at
the address on the label — commonly 192.168.0.1, 192.168.1.1 or 10.0.0.1,
sometimes a hostname like routerlogin.net. If none of those work,
finding the router’s address from your device
takes about thirty seconds.
Work through the wizard. It will ask for a connection type (leave it on automatic or DHCP unless you have DSL credentials), a Wi-Fi name, a Wi-Fi password and an admin password.
Set the admin password to something that is not the default. This is the one step that matters most and the one wizards most often skip past. The default credentials for every consumer router model are published and searchable. A router with factory admin credentials and remote management enabled is genuinely exposed.
The settings worth changing before you walk away
The wizard finishes and declares success. Four things are usually still wrong.
Firmware. Look for a firmware or update section and apply whatever is available. A router that has been in a warehouse for eight months is eight months behind on security fixes. Turn on automatic updates if the vendor offers them.
Remote management. Find it in the administration or advanced section and confirm it is off unless you specifically need to reach the router from outside your home. On by default is less common than it used to be, but it still happens.
WPS. The button-press pairing method is convenient; the PIN method has a long-standing brute-force weakness. If your router exposes them separately, turn off WPS PIN. If it is one toggle, turning the whole thing off costs you very little.
Band naming. Most routers now present 2.4GHz and 5GHz under one name and decide for you. That is fine for most houses, but devices sometimes cling to the slower band. If you have smart home gear that only works on 2.4GHz, or a streaming box that keeps choosing badly, splitting the bands into separate names gives you control — which band suits which device covers the trade-off.
Reconnect everything
If you reused the old Wi-Fi name and password, almost everything rejoins by itself within a few minutes. Phones, laptops and tablets come back first. Smart plugs, bulbs and older printers are the stragglers.
Devices that need manual attention:
- Smart home devices on 2.4GHz only. If your bands share a name, some of these refuse to pair during setup. Temporarily disabling 5GHz while you pair them is the standard workaround.
- Printers with a stored gateway address. If your new router uses a different address range than the old one, a printer with a static IP will vanish. Reset its network settings and let it use DHCP.
- Anything with port forwarding. Game consoles, NAS boxes, security cameras. Those rules live on the router and did not come across.
Check it actually works
Three quick tests before you consider the job done:
- Speed test on ethernet, plugged directly into the router. This should be close to your plan’s rated speed. If it is not, the problem is the line or the plan, not the router.
- Speed test on Wi-Fi, standing next to the router. Expect 30–50% of the ethernet figure. That is normal for a shared, half-duplex medium.
- Walk the house. Check the rooms where the old router struggled. If the new one still struggles there, no setting will fix it and you are looking at a mesh system or a wired access point.
If there is no internet after setup
The most common post-setup failure, and it is almost always one of three things.
The modem is still bound to the old router. Cable modems in particular remember the hardware address of whatever was plugged into them and keep handing the connection to that device. Power the modem off completely for two minutes, then on, and wait for it to settle fully before powering the router.
The cable is in the wrong port. The modem must connect to the port marked WAN or Internet, not one of the numbered LAN ports. It is a thirty second check and it catches a lot of people.
The router has no WAN address. Log into the admin page and find the status
or WAN section. An empty or 0.0.0.0 address means the router is not receiving
a connection from your provider, which is a line, modem or account problem
rather than a configuration one. On DSL, it usually means the provider username
and password are wrong or missing.
If the router does have a WAN address and devices still cannot reach anything, the fault has moved elsewhere, and the triage in Wi-Fi connected but no internet separates a DNS problem from a routing one.
Realistic expectations
A straightforward swap on a cable or fibre connection takes 15–20 minutes, most of which is waiting for boxes to boot. DSL with provider credentials adds ten minutes of hunting for a username.
The upgrade people notice most is coverage and the number of devices that stay connected reliably, not raw speed. If your old router was several years old, expect fewer dropouts and better behaviour with twenty devices online. Expect the speed test to land in the same place it always did, because that number comes from the line, not the box.