Openwrt Uci Configuration Guide

OpenWRT UCI configuration can be intimidating, but it's actually quite straightforward once you understand the basics. UCI stands for Unified Configuration Interface, and it's the configuration system used by OpenWRT.

The configuration files for OpenWRT are stored in the /etc/config directory, which contains a set of configuration files that can be edited to customize your router's settings. These files are human-readable and can be edited using a text editor.

To make changes to your OpenWRT configuration, you'll need to edit one or more of these configuration files. For example, to change your router's timezone, you would edit the /etc/config/timezone file.

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OpenWrt is a highly customizable, open-source firmware for routers and other network devices.

It's based on the Linux operating system, which is known for its flexibility and community-driven development.

OpenWrt uses a package manager called opkg, which allows you to easily install and manage software packages.

The firmware is designed to be highly customizable, with a wide range of configuration options available through the UCI (Unified Configuration Interface).

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You can access the UCI configuration through the command line or a web interface, depending on your preference.

The web interface is a great option for beginners, as it provides a user-friendly interface for configuring your router.

One of the key benefits of OpenWrt is its ability to support a wide range of hardware platforms, including routers from popular manufacturers like Netgear and Linksys.

This makes it a great option for those who want to breathe new life into an old router or try out a new device.

OpenWrt's community-driven development model means that new features and bug fixes are constantly being added to the firmware.

This ensures that your router stays up-to-date and secure, with the latest features and performance enhancements.

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Config files for OpenWRT are stored in the /etc/config directory. These files have a consistent syntax and can be edited manually or using uci commands.

You can view the contents of these files using the `cat` command, as shown in the example of the `/etc/config/network` file. This file contains the network configuration, including the IP address, netmask, and protocol for each interface.

UCI (Unified Configuration Interface) provides a set of commands to modify the config files. For example, you can use the `uci set` command to change the IP address of the lan network, which is configured as a bridge containing the eth0 interface.

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A common structure for config files is to use a key-value pair format, where each line represents a single setting with a corresponding value. This format is easy to read and write.

The key-value pair format is often separated by an equals sign (=) or a colon (:), as seen in the Apache configuration file example. The equals sign is used to separate the key from the value.

The order of the key-value pairs is usually not important, as long as the correct settings are present. This is the case in the Python configuration file example, where the settings are not strictly ordered.

In some cases, config files may include comments to explain the purpose of each setting. Comments are often denoted by a specific character, such as the hash symbol (#), as shown in the Ruby configuration file example.

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Config files are the backbone of any OpenWrt configuration. They contain the actual configuration data, which is used to write/update tool-specific config files.

The Unified Configuration Interface (UCI) is the standard way to manage these config files. You can edit them manually or use uci commands to change them. UCI configuration can be edited in the files in /etc/config directly or by using uci commands.

The files with the actual config are under /etc/config. These files have a consistent syntax and a set of uci commands that can be used to modify them.

You can use the uci command-line utility to get/set configuration or edit the files directly under /system/config. Often, we will provide uci command-line examples because these can be easily cut-n-pasted into a shell.

Here are some common uci commands:

You can also use uci commands to view and modify system configurations. For example, you can use uci show system to view all system configurations, or uci get system.@system[0].hostname to get the system hostname.

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Dynamic DNS with Cloudflare can be a bit tricky to set up, but don't worry, I've got you covered. To start, you'll need to create A & AAAA records on Cloudflare with dummy IP addresses, not real ones, so you can test if your DDNS is working correctly.

To create these records, go to the user API tokens page and get an API token, not an API key, and give it access to edit the zone data for your domain.

On OpenWRT, install the necessary packages, including "ddns-scripts", "ddns-scripts-cloudflare", "ddns-scripts-services", and "luci-apps-ddns". You might need to reload, log out and in, and restart uhttpd to see the "Services" item on the main OpenWRT Luci menu.

To set up the Dynamic DNS service, go to Services/Dynamic DNS, where you'll find two services at the bottom of the page, one for IPv4 and one for IPv6. For the IPv4 service, enter the fqdn of the domain you're trying to do DDNS with in the format "name@domain", but with "name" being the specific beginning of the fqdn and "domain" being the domain part, like "[email protected]".

Here's a quick rundown of the steps for setting up the IPv4 service:

You'll need to do something similar for the IPv6 service, but set "IP address version" to "IPv6-Address". I also had to make a change under the "Advanced Settings" tab to get it working.

Recommended read: Openwrt Disable Ipv6

Configuring OpenWrt is a straightforward process that can be managed using the uci command. You can view all network configurations with the command `uci show network`.

To modify the LAN IP address, you can use the command `uci set network.lan.ipaddr=192.168.2.1`. This will update the LAN IP address to the specified value.

You can also configure the WAN IP address by setting the `proto` option to `static` and then specifying the IP address with `uci set network.wan.ipaddr=192.168.100.100`. This will configure the WAN IP address to the specified value.

Some common network configuration commands include:

Configuring OpenWrt can be a bit tricky, but understanding the format of the configuration files can make it much easier.

UCI (Unified Configuration Interface) is a command-line utility that allows you to get, set, and edit configuration settings. You can use it to easily cut and paste commands into a shell.

UCI configuration can be edited in the files in /etc/config directly or by using uci commands. This is a more advanced method that requires some knowledge of the configuration files.

Network configuration is contained in the /etc/config/network file. This file contains the configuration settings for the network interfaces, including the IP address, netmask, and protocol.

The network configuration file is divided into sections, each representing a network interface. For example, the /etc/config/network file contains the following configuration settings:

Here's a summary of the network configuration settings:

To change the IP address of the lan network, you can use the uci command-line utility. This will update the configuration settings in the /etc/config/network file.

Configuring OpenWrt can be a bit tricky, but don't worry, I've got you covered. To change the IP address of the lan network, which is configured as a bridge containing the eth0 interface using UCI, you can use the command `uci set network.lan.ipaddr=192.168.2.1`.

To view all network configurations, use the command `uci show network`. This will display all the network settings, including the IP address, netmask, and gateway for each interface.

For another approach, see: Setup Openwrt Luci Https through Command Line

You can also use the `uci get` command to retrieve specific network settings. For example, to get the IP address of the lan interface, use the command `uci get network.lan.ipaddr`.

To change the IP address of the wan interface, use the command `uci set network.wan.ipaddr=192.168.100.100`. To view all wan configurations, use the command `uci show network.wan`.

Here's a summary of common configuration commands:

To commit changes to the network configuration, use the command `uci commit network`.

The Spanning Tree Protocol (STP) is a network protocol that builds a logical loop-free topology for Ethernet networks.

By default, bridges are configured without STP, which can lead to bridge loops and broadcast radiation if multiple ports are connected to a LAN.

To avoid bridge loops, you can enable STP by editing /etc/config/network and adding an option stp 1 to the interface.

STP prevents bridge loops by creating a logical loop-free topology for Ethernet networks.

You can verify that STP is enabled by using the brctl show command.

Enabling STP is a good idea if you want to connect multiple ports in a bridge to a LAN for redundancy purposes.

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Lua scripting is a powerful tool for customizing OpenWRT.

You can use Lua to create custom scripts for OpenWRT by editing the /etc/config/lua-uci file.

The lua-uci package provides a set of Lua functions for interacting with UCI, making it easy to read and write configuration files.

A simple example of a Lua script is the "uci show" command, which displays the current UCI configuration.

You can also use Lua to create custom configuration files for specific packages, such as the "wireless" package.

To do this, you can create a new file in the /etc/config directory with a .lua extension, and then use the "uci import" command to load the file into UCI.

For example, you can create a file called "wireless.lua" with the following contents:

`config wireless 'default'`

`option ssid 'MyNetwork'`

`option encryption 'psk2'`

`option key 'mysecretpassword'`

Then, you can use the "uci import" command to load the file into UCI:

`uci import wireless.lua`

This will create a new configuration file for the "wireless" package, with the specified settings.

You can script your custom settings and include them in your image to preconfigure your routers. This allows you to change your LAN configuration, pre-seed static DHCP settings, and preconfigure SSH, dynamic DNS, and more.

A word of warning: scripts in /etc/uci-defaults will run at every first boot, including after a successful flash or sysupgrade. This means you need to implement checks to prevent them from running multiple times.

You can create batch scripts that go into env/files/etc/uci-defaults in your buildroot, which don't need to be executable. Prefix them with 99_ to run them after the default scripts.

A simple batch script to add a static DHCP lease looks like this:

OpenWrt is a popular open-source operating system designed for routers and other embedded devices. It's a highly customizable platform that allows users to optimize their network performance and security.

The OpenWrt project was started in 2004 by Holger Berger, a German developer. He aimed to create a more flexible and secure alternative to traditional router firmware.

One of the key features of OpenWrt is its use of the UCI (Unified Configuration Interface) system, which provides a standardized way of managing device settings. This makes it easier for users to configure and customize their devices.

The UCI system is based on a simple text-based configuration file, which is stored in the /etc/config directory. This file contains a list of configuration options, each with its own set of parameters.

OpenWrt's flexibility and customizability have made it a favorite among network enthusiasts and professionals alike. Its ability to run on a wide range of devices has also made it a popular choice for IoT projects and other embedded systems.