Raspberry Pi Router: Hardware, Setup and When It’s Worth It

Yes, you can easily build a Raspberry Pi router or Wi-Fi access point to customize your home network. All you really need is the Pi itself, a second network interface (usually a USB Ethernet adapter), Raspberry Pi OS Lite or router-specific firmware, and some setup for networking, forwarding, and NAT.

For learning, testing, or light home use, it’s a good project because you get to see how everything works under the hood. But if you just want a fast, reliable home router, a Raspberry Pi is probably not the right choice.

A Pi router is just a small Linux box running as a router: handing out IP addresses, doing NAT, maybe serving as a Wi-Fi hotspot.

Lots of guides (of varying quality) explain how to do it, but very few walk you through matching methods to your OS version or troubleshooting when devices connect but don’t get addresses. 

This guide lines up the hardware, OS choices, current setup methods (including headless Wi-Fi setup), and the most common snags.

First, one warning: if you misconfigure routing or firewalls, you can break your own internet access. So, do this project on a spare network or alongside your main router, and keep some way to access your Pi (even if it’s just plugging in a keyboard or using SSH over a different interface).

Testing note: the commands in this guide come from third-party guides and were not tested on live networks. Try them on a spare Pi, and check them against the current Raspberry Pi documentation before using them on anything important.

What Hardware Do You Actually Need?

Start with a Raspberry Pi board with at least one Ethernet port. LinuxBabe (June 2026) says go for a Pi 4 or newer for best results; Adafruit (April 2026) says even the Pi 3 Model B+ is OK for their access point/router how-tos. The key is having two network connections: one for your internet side, one for your devices.

About those kits: A “Raspberry Pi router kit” is usually just a Pi, a case, power supply, and maybe some cables bundled together. 

You don’t have to buy a kit, and they don’t make setup any easier. Just make sure you have a second network interface before you start.

How Fast is a Pi Router?

LinuxBabe puts a Pi 3B at roughly 100–300 Mbps, a Pi 4 at 800 Mbps to 1 Gbps with NAT, and a Pi 5 topping 2 Gbps with the right adapters. 

No detailed tests, so use these as rough ballpark numbers. Real speed depends on your hardware, what the Pi is doing, and how you set it up. 

For example, if you’re on a 500 Mbps plan and only using basic NAT, a Pi 4 can handle it. Toss in VPN or content filters, and your Pi might become the speed limit. Test with your actual setup to know for sure. A free tool such as iperf3 can measure real throughput between two devices.

Which OS Should You Run?

• Raspberry Pi OS Lite (with NetworkManager): Raspberry Pi OS has used NetworkManager since Bookworm (October 2023), and newer Trixie-based images do too. Right now, most guides use NetworkManager’s nmcli for setup. LinuxBabe’s guide uses Raspberry Pi OS Lite, UFW/iptables for NAT, a DHCP server, and Unbound DNS. Flexible, lots of help available.
• RaspAP: This script turns your Pi into an access point/router with a web interface including DHCP, optional VPN, ad-blocking, and more. (I haven’t tested it myself.)
• OpenWrt: This is proper router firmware. SunFounder says OpenWrt isn’t officially supported on Pi, but you can find community builds. Always check the OpenWrt device pages for your model and Wi-Fi chipset before diving in.

If an older guide uses dhcpcd, hostapd, or a standalone dnsmasq setup, those steps may not match a NetworkManager-based image. NetworkManager’s shared mode handles the hotspot and address sharing itself, so follow one method from start to finish.

How to Connect Your Pi to Wi-Fi Without a Monitor

Set up your Wi-Fi connection before first boot. Raspberry Pi Imager lets you configure hostname, user, local settings, Wi-Fi, and enable SSH all before you even write the card. Just enter your Wi-Fi SSID and password, and your Pi will try to connect right away.

Steps:

1. In Raspberry Pi Imager, select OS Lite and open the customisation step. In Imager 2.x, it opens after you choose the storage device; in older versions (1.8), use the gear icon or press Ctrl+Shift+X.
2. Fill out hostname, username, password, Wi-Fi SSID, Wi-Fi country, and enable SSH (or Raspberry Pi Connect). Without a monitor, one of these is your only way in. In Imager 2.x, the Wi-Fi country comes from the Localisation settings.
3. Write the card, plug it into your Pi, and power up.
4. To find the Pi, check your router’s device list, scan your network with nmap -sn, use a phone app like Fing, or just ssh to raspberrypi.local if you’re using Avahi and the default hostname.
5. Connect over SSH and accept the fingerprint warning.

Two Notes: 

• First, the dual-band Pis (3B+ and later) keep networking disabled until you set the WLAN country. Imager usually takes care of this, but you can always set it with raspi-config.
• Second, if you don’t use Imager, putting an empty file named “ssh” and a userconf.txt in the boot partition does the job. On Bookworm and later, the boot partition is mounted at /boot/firmware on the running system. If Wi-Fi isn’t joining, plug in an Ethernet cable.

Setting Up a Pi as a Wi-Fi Access Point (Using NetworkManager)

This method is for Raspberry Pi OS Bookworm and newer NetworkManager-based releases such as Trixie (check yours with cat /etc/os-release). It follows RaspberryTips (November 2023, updated December 2025). I haven’t double-checked against official Pi docs or personally run these commands, so try this on a test Pi first.

Set the Wi-Fi country first (raspi-config, then Localisation Options, then WLAN Country). Connect the Pi to your internet via Ethernet, then:

• Connect the Pi to your internet via Ethernet, then:
• sudo nmcli con add con-name hotspot ifname wlan0 type wifi ssid “YourNetworkName”
• sudo nmcli con modify hotspot wifi-sec.key-mgmt wpa-psk
• sudo nmcli con modify hotspot wifi-sec.psk “a-strong-passphrase”
• sudo nmcli con modify hotspot 802-11-wireless.mode ap 802-11-wireless.band bg ipv4.method shared
• sudo nmcli connection up hotspot
• The last modify command puts wlan0 in access point mode and enables address sharing; the last command starts the hotspot. The setting band bg uses 2.4 GHz; use a for 5 GHz if your hardware supports it.

This usually does the job for home use. Try connecting a phone. Use sudo nmtui for tweaks, and read the logs with:

journalctl -u NetworkManager | grep -i hotspot

For other useful nmcli commands (show, up, down, delete), see Adafruit’s guide.

Wlan0 vs Wlan1: What’s the Difference?

wlan0 is the Pi’s built-in Wi-Fi. Plug in a USB Wi-Fi adapter, and you get wlan1. The basic setup has wlan0 as your access point and Ethernet as your internet connection. 

A single Wi-Fi radio is not designed to be an uplink and an access point at the same time, so if you want Wi-Fi as your internet side, add a second (USB) Wi-Fi adapter and use the correct interface names. Always check your adapter’s Linux compatibility.

From Access Point to Full Router

The setting ipv4.method shared gives clients addresses on a private subnet (NetworkManager’s default is 10.42.0.0/24) and shares your internet connection. If you want extra features (actual LAN separation, firewalling, DNS, etc.), follow LinuxBabe’s approach:

1. Give the LAN side a static address with nmcli (say, 192.168.10.1/24).
2. Enable IP forwarding via sysctl.
3. Add NAT masquerading and forwarding rules with UFW/iptables.
4. Run a DHCP server on the LAN side and use something like Unbound for DNS.
5. Optionally, add hostapd for Wi-Fi, or Pi-hole/AdGuard Home for filtering.

A Couple Notes: LinuxBabe uses the ISC DHCP server, but ISC ended support for it in 2022; try dnsmasq or Kea instead. Also, make the forwarding setting (net.ipv4.ip_forward=1) and your firewall rules persistent, because they can disappear after a reboot.

Troubleshooting: Devices See Your Network, But Don’t Get an IP

If your devices see the Pi network but can’t get addresses or join, start by checking the logs (journalctl, filter with “hotspot” or “wifi”). After changes, reboot at least once; sometimes it takes a couple of restarts. Common causes: DHCP not running, firewall rules blocking traffic, incorrect interface, or missing configuration.

Quick checks:

• Confirm the Wi-Fi country is set.
• Confirm the hotspot is active: nmcli connection show –active
• With NetworkManager’s shared mode, address sharing is built in. With a manual setup, confirm your DHCP server is running.
• Check forwarding: cat /proc/sys/net/ipv4/ip_forward should print 1.
• Make sure firewall rules are not blocking DHCP traffic (UDP ports 67 and 68).

Is a Raspberry Pi Router Really Worth It?

• Good For: learning, network labs, a travel router, running a guest network, or messing with DNS and VPN.
• Not So Great For: your primary home router if you care about reliability, top Wi-Fi speeds, or easy support. SunFounder says a Pi router works for basic or small office/home networks, but not for heavy loads or business use.
• Cost and Efficiency? SunFounder claims lower cost and power use than a store-bought router, but actual numbers depend on what you use and how much your time and effort count.
• Security: You’re in charge of all updates, firewall rules, and Wi-Fi security. Use WPA2/WPA3, never fall back to old stuff like TKIP. Basic hardening: use SSH keys or a strong password, do not expose SSH to the internet side, and keep the system updated with sudo apt update && sudo apt full-upgrade.
• It’s a Single Point of Failure: If your Pi or SD card goes, your network’s down. Always keep your old router as a backup, and back up configs.

In short: A Raspberry Pi router is a fun project and a useful tool for labs or small setups as long as you stick to a single OS method, plan for that second network interface, and test what happens if things fail. For most homes that want fast, reliable, no-hassle Wi-Fi, a standard router will always be simpler.

Next Step: Try it out on a spare Pi, keeping your main router running. Get Wi-Fi and DHCP working first, then build up routing and filtering one piece at a time.

(Usual Disclaimer: This is general info, not personal security advice. All setup commands are from third-party guides and weren’t tested on live networks; always double-check with up-to-date Raspberry Pi docs before you use them on anything important.)

Frequently Asked Questions