How to Share Wi-Fi with Ubuntu: 3 Working Methods (2026)

Sharing the Internet from a laptop or PC Ubuntu — a problem users face in situations where they don't have a router at hand but need to connect a smartphone, tablet, or other computer to the network. Unlike Windows, where the "Mobile Hotspot" function is built into the system, in Ubuntu This process requires manual configuration via the terminal or graphical utilities. But don't be alarmed: with the right approach, distributing Wi-Fi With Ubuntu 22.04 LTS or 24.04 LTS It can be done in 5-10 minutes, even without deep knowledge of Linux.

In this article we will look at three proven methods: the classic one hostapd And dnsmasq, simplified with nmcli (built-in network manager), as well as a graphical method through GNOME Network ManagerWe'll pay special attention to common errors—for example, when an access point is created, but devices don't connect, or the upload speed drops to zero. You'll also learn how to check the compatibility of your Wi-Fi adapter with the regime AP (Access Point) and what to do if the driver does not support this function.

Before you begin, make sure your laptop is connected to the internet via Ethernet or USB modem — You can only share a connection that is already active. If you are using Ubuntu Server without a graphical interface, focus on the first method. For desktop versions with GNOME or KDE All three options will do.

1. Checking the compatibility of the Wi-Fi adapter with the access point mode

Not all wireless adapters support operation in this mode. Access Point (AP)If your adapter is not compatible, distribute Wi-Fi If this doesn't work, the system will either return an error, or the access point will be visible, but devices won't be able to connect. To avoid wasting time, first check the capabilities of your equipment.

Open Terminal (Ctrl+Alt+T) and run the command:

iw list | grep -A 10 "Supported interface modes"

Look for the line in the output * APIf it is, your adapter supports sharing. If not, try updating the driver or using an external one. USB Wi-Fi adapter (for example, chip-based models Ralink RT5370 or Atheros AR9271 usually work without problems).

• ✅ Supported by: lines AP or P2P-client, P2P-GO in the conclusion.
• ❌ Not supported: absent AP, only managed or monitor.
• 🔄 Solution for unaccompanied adapters: purchase of an external module (from TP-Link, D-Link with support AP-mode).

⚠️ Attention: On some laptops (for example, with adapters Broadcom) mode AP may be blocked by proprietary drivers. Before setting up, remove them and install open-source alternatives via sudo apt install firmware-b43-installer (For Broadcom).

2. Method 1: Sharing Wi-Fi via hostapd and dnsmasq (universal method)

This method works on most Linux distributions and is considered the most reliable. We'll use two daemons: hostapd to create an access point and dnsmasq to distribute IP addresses to connected devices. The entire process will take about 15 minutes but requires permissions. sudo.

First, install the required packages:

sudo apt update
sudo apt install hostapd dnsmasq

Next, stop the services to configure them manually:

sudo systemctl stop hostapd
sudo systemctl stop dnsmasq

Now create a configuration file for hostapdOpen it in a text editor:

sudo nano /etc/hostapd/hostapd.conf

Insert the following template, replacing YourSSID And YourPassword to the desired network name and password:

interface=wlan0
driver=nl80211
ssid=YourSSID
hw_mode=g
channel=6
wmm_enabled=0
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
wpa=2
wpa_passphrase=YourPassword
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP

Save the file (Ctrl+O, then Ctrl+X) and specify its path in the service settings:

sudo nano /etc/default/hostapd

Find the line #DAEMON_CONF and replace it with:

DAEMON_CONF="/etc/hostapd/hostapd.conf"

Now set it up dnsmasq. Open the configuration file:

sudo nano /etc/dnsmasq.conf

Add the following lines to the end (replace wlan0 to your interface, if it is different):

interface=wlan0
dhcp-range=192.168.100.100,192.168.100.200,255.255.255.0,24h

All that remains is to set it up IP forwarding (forwarding traffic between interfaces). Open the file sysctl.conf:

sudo nano /etc/sysctl.conf

Uncomment or add the line:

net.ipv4.ip_forward=1

Apply changes:

sudo sysctl -p

Finally, add the rules iptables to forward traffic (replace eth0 to your network interface with the Internet, for example, enp3s0):

sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
sudo iptables -A FORWARD -i wlan0 -o eth0 -j ACCEPT

Start services:

sudo systemctl start hostapd
sudo systemctl start dnsmasq

Done! The hotspot should appear in the list of available networks. Connect to it from another device and test internet access.

Ping to 8.8.8.8 from a connected device|Download speed (speedtest.net)|Connection stability (no interruptions)|Access to local resources (if needed)

-->

⚠️ Attention: If the access point does not work after rebooting, the rules iptables are reset. To save them, install the package iptables-persistent:

sudo apt install iptables-persistent
sudo netfilter-persistent save

3. Method 2: Quick distribution via nmcli (for Ubuntu with NetworkManager)

If the first method seemed too complicated, use the built-in tool NetworkManager — nmcliThis method is simpler, but may not work on server versions. Ubuntu No graphical interface. The main advantage is that you don't need to edit configuration files manually.

First check your name Wi-Fi adapter:

ip a

Usually it is wlan0, wlp3s0 or something similar. Next, create a new access point:

sudo nmcli dev wifi hotspot ifname wlan0 ssid MyHotspot password "12345678"

Replace wlan0, MyHotspot And 12345678 to your values. If the command runs without errors, the access point is already active!

To share the Internet, turn on IP forwarding (as in the first method) and add a rule iptables:

sudo sysctl -w net.ipv4.ip_forward=1
sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

Check that the devices can connect. If you need to disable the hotspot, run:

sudo nmcli dev disconnect wlan0

• ⚡ Advantages of the method: quick setup, no need to manually edit configs.
• ⚠️ Restrictions: may not work on older versions NetworkManager (up to 1.4).
• 🔄 Alternative: If nmcli does not support hotspot, use nmtui (text interface).

4. Method 3: Graphical interface (for GNOME/KDE)

The easiest way for users Ubuntu Desktop - using a graphical interface Network ManagerIt does not require knowledge of commands and is suitable for one-time distribution. Wi-Fi.

Open the network menu in the upper right corner of the screen (icon Wi-Fi or Ethernet). Select Network settings (or Edit Connections (in the English version). In the window that opens, click Add (Add) and select Wi-Fi.

Fill in the fields:

• 📛 Connection name: arbitrary (for example, Ubuntu-Hotspot).
• 🔗 SSID: your network name (will be displayed on devices).
• 🔐 Security mode: select WPA & WPA2 Personal.
• 🔑 Password: at least 8 characters.
• 📡 Mode: Access Point.

After saving, go to the tab IPv4 and install:

• 🔄 Method: Shared to other computers.
• 📌 Address: leave 10.42.0.1 (default).

Save the settings and activate the connection. Your hotspot should now be visible to other devices. If you're not getting internet, check that your primary connection settings (e.g., Ethernet) the parameter is enabled Allow other users to use this connection.

⚠️ Attention: In some versions GNOME (for example, in Ubuntu 24.04) option Shared to other computers may be missing. In this case, use nmcli (method 2) or customize dnsmasq manually.

5. Common mistakes and their solutions

Even with proper setup, problems can still arise. We've compiled the most common errors and how to fix them.

If your problem is not described in the table, check the system service logs:

journalctl -u hostapd -u dnsmasq --no-pager -n 50

Please note the lines with error or failed - They will point to the root of the problem.

6. Optimizing connection speed and stability

By default the access point is on Ubuntu It may perform slower than your router. This is due to driver limitations and default settings. Here are some ways to improve performance:

• 📶 Channel selection: Use commands sudo iwlist wlan0 scan | grep Channelto find the least loaded channel. hostapd.conf set it in the parameter channel.
• 🔗 Mode hw_mode: If your adapter supports 802.11n (5 GHz), install hw_mode=a And ieee80211n=1 in the config hostapd.
• 🔋 Energy Saving: Disable power saving for your Wi-Fi adapter:

  sudo iwconfig wlan0 power off

• 🛡️ Encryption: Use WPA2-PSK (instead of WPA+WPA2) for less load on the processor.

Critical setting for older adapters: If the upload speed does not exceed 54 Mbps, add hostapd.conf line wmm_enabled=0This will disable the Quality of Service (QoS) control mechanism, which can slow down performance on weak hardware.

To check your current speed, use nload:

sudo apt install nload
nload wlan0

If the speed is below 10 Mbps when connecting one device, the problem is most likely in the driver or channel settings.

7. Security: How to protect your access point

Distribution Wi-Fi Using a laptop is convenient, but not secure. By default, such a network is more vulnerable than a router, as it often uses weak passwords or outdated encryption protocols. Follow these recommendations to minimize the risks:

• 🔐 Complex password: Use a combination of 12+ characters with numbers, letters, and special characters. Avoid simple passwords like 12345678.
• 🔄 Changing your password regularly: If you frequently share Wi-Fi in public places, change your password every few days.
• 🚫 MAC filtering: IN hostapd.conf add a line macaddr_acl=1 and specify the allowed MAC addresses via accept_mac_file=/etc/hostapd/hostapd.accept.
• 🛡️ Disabling WPS: Make sure there is no line in the config wps_state=2 - This protocol is vulnerable to hacking.

To check who is connected to your network, use:

sudo arp-scan --interface=wlan0 --localnet

If you see unfamiliar devices, change the password immediately and restart the access point.

⚠️ Attention: Never share Wi-Fi from your laptop on networks with sensitive data (such as corporate or banking networks). For such situations, use a separate router with a guest network.

FAQ: Frequently asked questions about sharing Wi-Fi with Ubuntu

sudo tc qdisc add dev wlan0 root handle 1: htb default 30
sudo tc class add dev wlan0 parent 1: classid 1:10 htb rate 5mbit
sudo tc filter add dev wlan0 protocol ip parent 1:0 prio 1 u32 match ip dst 192.168.100.100 flowid 1:10