### Download and Compile openNDS

Source: https://opennds.readthedocs.io/en/stable/compile.html

Download, extract, compile, and install the openNDS source code. This snippet also includes enabling the openNDS service to start on boot.

```bash
wget https://codeload.github.com/opennds/opennds/tar.gz/v10.2.0
tar -xf v10.2.0
cd openNDS-10.2.0
```

```bash
make
sudo make install
sudo systemctl enable opennds
```

--------------------------------

### Autonomous Blocklist Example (YouTube)

Source: https://opennds.readthedocs.io/en/stable/config.html

Example of adding YouTube to the autonomous blocklist by specifying its FQDN.

```bash
list blocklist_fqdn_list 'youtube.com'
```

--------------------------------

### Install OpenWrt Packages

Source: https://opennds.readthedocs.io/en/stable/walledgarden.html

Install necessary packages for Walled Garden on OpenWrt. ipset is not required for OpenWrt 23.05.x and onwards. Ensure dnsmasq-full is installed.

```bash
opkg update
opkg install ipset (not required for OpenWrt 23.05.x and onwards)
opkg remove dnsmasq
opkg install dnsmasq-full
```

--------------------------------

### Start openNDS service on OpenWrt

Source: https://opennds.readthedocs.io/en/stable/install.html

Use this command to start the openNDS service. Alternatively, rebooting the router will also start the service if it is enabled.

```bash
service opennds start
```

--------------------------------

### Install OpenWrt Build Dependencies

Source: https://opennds.readthedocs.io/en/stable/compile.html

Installs the necessary development tools and libraries on Debian/Ubuntu systems to build OpenWrt images.

```bash
sudo apt-get install git subversion g++ libncurses5-dev gawk zlib1g-dev build-essential
```

--------------------------------

### Install dnsmasq-full and ipset for Autonomous Walled Garden

Source: https://opennds.readthedocs.io/en/stable/config.html

Installs necessary packages for autonomous Walled Garden configuration on OpenWrt. Ensure dnsmasq is removed if upgrading from an older version.

```Shell
opkg update
opkg install ipset
opkg remove dnsmasq
opkg install dnsmasq-full
```

--------------------------------

### Autonomous Blocklist Example (Facebook)

Source: https://opennds.readthedocs.io/en/stable/config.html

Example of adding Facebook to the autonomous blocklist by specifying its FQDNs.

```bash
list blocklist_fqdn_list 'facebook.com fbcdn.net'
```

--------------------------------

### Configure Custom Images in ThemeSpec

Source: https://opennds.readthedocs.io/en/stable/config.html

Examples of configuring custom images for use in ThemeSpec files, including logos and banners. The image URL must start with http://, https://, or file://.

```bash
list fas_custom_images_list 'logo_png=https://openwrt.org/_media/logo.png'
```

```bash
list fas_custom_images_list 'banner1_jpg=https://raw.githubusercontent.com/openNDS/openNDS/v9.0.0/resources/bannerbw.jpg'
```

```bash
list fas_custom_images_list 'banner2_jpg=https://raw.githubusercontent.com/openNDS/openNDS/v9.0.0/resources/bannerpickle.jpg'
```

```bash
list fas_custom_images_list 'banner3_jpg=https://raw.githubusercontent.com/openNDS/openNDS/v9.0.0/resources/bannerseawolf.jpg'
```

--------------------------------

### Configure and Build OpenWrt Image with openNDS

Source: https://opennds.readthedocs.io/en/stable/compile.html

Clones the OpenWrt repository, updates and installs feeds, adds the openNDS package, configures the build, and compiles the image.

```bash
git clone https://git.openwrt.org/openwrt/openwrt.git
cd openwrt

./scripts/feeds update -a
./scripts/feeds install -a
./scripts/feeds uninstall opennds

git clone git://github.com/opennds/opennds.git
cp -rf opennds/openwrt/opennds package/
rm -rf opennds/

make defconfig
make menuconfig
```

```bash
make
```

--------------------------------

### Autonomous Blocklist Example (Specific Ports)

Source: https://opennds.readthedocs.io/en/stable/config.html

Example of denying access only to specific ports (443 and 80) for authenticated users, allowing other ports.

```bash
list blocklist_port_list '443 80'
```

--------------------------------

### Configure uhttpd for FAS with PHP

Source: https://opennds.readthedocs.io/en/stable/fas.html

Add these lines to `/etc/config/uhttpd` to enable FAS with PHP on port 2080. Ensure `php8-cgi` is installed.

```config
list listen_http    0.0.0.0:2080
list interpreter ".php=/usr/bin/php-cgi"
```

--------------------------------

### Download and Compile libmicrohttpd

Source: https://opennds.readthedocs.io/en/stable/compile.html

Download, extract, configure, and install the libmicrohttpd library, a dependency for openNDS. Ensure the version is compatible with your openNDS version.

```bash
wget https://ftp.gnu.org/gnu/libmicrohttpd/libmicrohttpd-0.9.71.tar.gz
tar  -xf libmicrohttpd-0.9.71.tar.gz
cd libmicrohttpd-0.9.71
```

```bash
./configure --disable-https
make
sudo rm /usr/local/lib/libmicrohttpd*
sudo make install
sudo rm /etc/ld.so.cache
sudo ldconfig -v
cd ..
```

--------------------------------

### Update package list and install openNDS on OpenWrt

Source: https://opennds.readthedocs.io/en/stable/install.html

Run these commands via SSH to install openNDS on OpenWrt 23.3.x or higher. Ensure your DHCP daemon is serving addresses on the intended interface before proceeding.

```bash
opkg update
```

```bash
opkg install opennds
```

--------------------------------

### is_nodog

Source: https://opennds.readthedocs.io/en/stable/libraries.html

Checks if nodogsplash is installed. It returns the string 'nodog_yes' and an exit code of 0 if installed, or 'nodog_no' and an exit code greater than 0 if not installed.

```APIDOC
## is_nodog

### Description
Checks if nodogsplash is installed.

### Returns
String 'nodog_yes' and exit code 0 if it is installed, 'nodog_no' and exit code >0 if it is not.
```

--------------------------------

### Configure Use of Outdated libmicrohttpd (MHD)

Source: https://opennds.readthedocs.io/en/stable/config.html

Set this option to '1' to allow OpenNDS to attempt starting with older MHD versions (earlier than 0.9.71) and log an error. The default is '0', which causes NDS to terminate if MHD is too old. Use with caution due to potential instability.

```config
option use_outdated_mhd '1'
```

--------------------------------

### Get Specific Client Details

Source: https://opennds.readthedocs.io/en/stable/ndsctl.html

Retrieves detailed information about a specific client in JSON format, identified by MAC, IP, token, or HID. This is useful for integration with scripts. Clients not in a preauthenticated state may not be authenticated unless 'allow_preemptive_authentication' is enabled.

```bash
/usr/bin/ndsctl json [mac|ip|token|hid]
```

--------------------------------

### Set MHD WebRoot Directory

Source: https://opennds.readthedocs.io/en/stable/config.html

Specifies the local path for system CSS files and other static page content. For example, the splash.css file would be served from this directory.

```config
option webroot '/etc/opennds/htdocs'
```

--------------------------------

### Manage openNDS Service

Source: https://opennds.readthedocs.io/en/stable/compile.html

Commands to control the openNDS service, including starting, restarting, stopping, and disabling it.

```bash
sudo systemctl start opennds
```

```bash
sudo systemctl restart opennds
```

```bash
sudo systemctl stop opennds
```

```bash
sudo systemctl disable opennds
```

--------------------------------

### Configure OpenNDS for fas-aes.php

Source: https://opennds.readthedocs.io/en/stable/fas.html

These settings are added to the /etc/config/opennds file to configure OpenNDS to use the fas-aes.php script. Ensure PHP 8 or higher with php8-cgi is installed and the script is placed in the web root.

```text
option fasport '2080'
option faspath '/nds/fas-aes.php'
option fas_secure_enabled '2'
option faskey 'your_secret_hashed_key_string'
```

--------------------------------

### Define Custom Files in OpenNDS

Source: https://opennds.readthedocs.io/en/stable/config.html

Configure custom files to be served by a local FAS. Ensure file names and URLs are properly encoded if they contain spaces or single quotes. The URL must start with http://, https://, or file://. For file:// URLs, ensure the path is a valid mountpoint accessible by OpenNDS.

```bash
list fas_custom_files_list '<file_name1_[type]=file_url1>'
list fas_custom_files_list '<file_name2_[type]=file_url2>'
```

```bash
list fas_custom_files_list 'advert1_htm=https://raw.githubusercontent.com/openNDS/openNDS/v9.0.0/resources/bannerpickle.htm'
```

--------------------------------

### pre_setup

Source: https://opennds.readthedocs.io/en/stable/libraries.html

Creates and configures the base chains for OpenNDS nftables. Returns an exit code of 0 if successful, or 1 if failed.

```APIDOC
## pre_setup

### Description
Creates and configures OpenNDS nftables base chains.

### Returns
Exit code 0 if successful, 1 if failed.
```

--------------------------------

### Enable Pre-Installed Dynamic User/Email Login

Source: https://opennds.readthedocs.io/en/stable/customize.html

Enable the pre-installed dynamic login page sequence by setting the login_option_enabled to '2'.

```shell
option login_option_enabled '2'
```

--------------------------------

### Configure Pre-emptive Clients

Source: https://opennds.readthedocs.io/en/stable/config.html

Use this command to add clients to the pre-emptive authentication list. Parameters like session timeout, bandwidth rates, and quotas can be specified. A value of '0' or omission sets the parameter to the global default.

```bash
list preemptivemac 'mac=00:00:C0:01:D0:01;sessiontimeout=1200;uploadrate=200;downloadrate=0;uploadquota=0;downloadquota=0;custom=custom string for preemptivemac1'
```

```bash
list preemptivemac 'mac=00:00:D0:01:D0:02;sessiontimeout=1000;uploadrate=200;downloadrate=800;uploadquota=0;downloadquota=0;custom=custom string for preemptivemac2'
```

```bash
list preemptivemac 'mac=00:00:E0:01:D0:03;sessiontimeout=4200;uploadrate=100;downloadrate=0;uploadquota=0;downloadquota=0;custom=custom_string_for_preemptivemac3'
```

--------------------------------

### Prepare Local openNDS Development Environment for OpenWrt

Source: https://opennds.readthedocs.io/en/stable/compile.html

Sets up a local development environment for openNDS within an OpenWrt build. This involves cloning the openNDS repository, committing local changes, and creating a symbolic link.

```bash
git clone git://github.com/opennds/opennds.git
cd opennds

… apply your changes

git commit -am "my change"

ln -s /my/own/project/folder/opennds/.git openwrt/package/opennds/git-src
```

--------------------------------

### Show Full openNDS Configuration (OpenWrt)

Source: https://opennds.readthedocs.io/en/stable/customize.html

Use this UCI command to display the complete current configuration of openNDS.

```bash
uci show opennds

```

--------------------------------

### Get openNDS Daemon Status

Source: https://opennds.readthedocs.io/en/stable/ndsctl.html

Prints the current status of the openNDS daemon to standard output.

```bash
/usr/bin/ndsctl status
```

--------------------------------

### Get Gateway Name (OpenWrt)

Source: https://opennds.readthedocs.io/en/stable/customize.html

Retrieve the current Gateway Name setting for openNDS using the UCI command.

```bash
uci get opennds.@opennds[0].gatewayname

```

--------------------------------

### Enable BinAuth Support Script

Source: https://opennds.readthedocs.io/en/stable/config.html

Enable BinAuth support by specifying the path to the BinAuth script. This script handles post-authentication processing and client database generation for re-authentication.

```config
option binauth '/usr/lib/opennds/binauth_log.sh'
```

--------------------------------

### Define FAS Generic Variables

Source: https://opennds.readthedocs.io/en/stable/config.html

Configure generic FAS variables for use in custom FAS or ThemeSpec scripts. Examples include 'membership_number' and 'access_code'.

```bash
list fas_custom_variables_list 'membership_number=number'
```

```bash
list fas_custom_variables_list 'access_code=password'
```

--------------------------------

### Enable openNDS Service

Source: https://opennds.readthedocs.io/en/stable/config.html

Set to 1 to enable openNDS. Set to 0 to disable.

```config
option enabled 1
```

--------------------------------

### Configure Autonomous Blocklist (FQDNs)

Source: https://opennds.readthedocs.io/en/stable/config.html

Configures an autonomous blocklist using a list of FQDNs. Requires dnsmasq-full and potentially ipset. If no ports are specified, all protocols and ports for the FQDNs are blocked.

```bash
list blocklist_fqdn_list 'fqdn1 fqdn2 fqdn3 .... fqdnN'
```

```bash
list blocklist_fqdn_list 'fqdn1'
```

```bash
list blocklist_fqdn_list 'fqdn2'
```

```bash
list blocklist_fqdn_list '....... etc.'
```

```bash
list blocklist_fqdn_list 'fqdnN'
```

--------------------------------

### Configure Ndsctl Socket Path

Source: https://opennds.readthedocs.io/en/stable/config.html

Sets the name for the ndsctl socket, relative to the tmpfs mountpoint. Ensure the specified directory exists. The example shows a custom path within /tmp.

```config
option ndsctlsocket 'sockets/ndsctl.sock'
```

--------------------------------

### List Clients and Trusted Devices

Source: https://opennds.readthedocs.io/en/stable/ndsctl.html

Outputs a JSON formatted list of all clients and trusted devices managed by openNDS.

```bash
/usr/bin/ndsctl json
```

--------------------------------

### Configure Remote Image Refresh Interval

Source: https://opennds.readthedocs.io/en/stable/clientstatus.html

Set the remotes_refresh_interval option to define how often custom images and files are refreshed from their remote sources. Example sets the interval to 10 minutes.

```config
option remotes_refresh_interval '10'
```

--------------------------------

### Enable Default Dynamic Click to Continue

Source: https://opennds.readthedocs.io/en/stable/customize.html

Enable the default dynamic click to continue page sequence by setting the login_option_enabled to '1'.

```shell
option login_option_enabled '1'
```

--------------------------------

### Add Custom Image to Status Page

Source: https://opennds.readthedocs.io/en/stable/clientstatus.html

Include custom images in the status page by configuring the fas_custom_images_list option. The image will be stored in /etc/opennds/htdocs/ndsremote/. Example shows how to display the OpenWrt logo.

```config
list fas_custom_images_list 'logo_png=https://openwrt.org/_media/logo.png'
```

--------------------------------

### List All iptables Rules

Source: https://opennds.readthedocs.io/en/stable/debug.html

To investigate potential conflicts with iptables, list all rules across all chains using the 'iptables -L' command.

```bash
iptables -L
```

--------------------------------

### Set Upload Bucket Ratio

Source: https://opennds.readthedocs.io/en/stable/config.html

Configure the ratio for upload bucket size. Used with MaxUploadBucketSize to control upload rate limiting. Large values may consume significant memory.

```config
option upload_bucket_ratio ‘1’
```

--------------------------------

### Enable Custom Dynamic ThemeSpec Pages

Source: https://opennds.readthedocs.io/en/stable/customize.html

Enable custom ThemeSpec page sequences by setting login_option_enabled to '3' and specifying the path to your ThemeSpec script.

```shell
option login_option_enabled '3'
```

```shell
option themespecpath '/path/to/themespec_script'
```

--------------------------------

### Set Custom Client Status Path

Source: https://opennds.readthedocs.io/en/stable/config.html

Specify a custom script to generate the client status page. Ensure the script path is correctly set.

```config
option statuspath '/mycustomscripts/custom_client_params.sh'
```

--------------------------------

### Configure Autonomous Blocklist (Ports)

Source: https://opennds.readthedocs.io/en/stable/config.html

Specifies ports to be blocked for all FQDNs listed in 'blocklist_fqdn_list'. If 'blocklist_port_list' is not specified, all ports are blocked.

```bash
list blocklist_port_list 'port1 port2 port3 .... portN'
```

--------------------------------

### Define Custom Files for ThemeSpec

Source: https://opennds.readthedocs.io/en/stable/customize.html

Specify custom HTML files for ThemeSpec pages, providing the URL for each file.

```shell
list fas_custom_files_list 'advert1_htm=https://raw.githubusercontent.com/openNDS/openNDS/9.0.0/resources/bannerpickle.htm'
```

--------------------------------

### Check dnsmasq Compile Time Options

Source: https://opennds.readthedocs.io/en/stable/walledgarden.html

Verify dnsmasq compile time options on generic Linux platforms. This command helps determine if an upgrade to dnsmasq-full is necessary.

```bash
dnsmasq --version | grep -m1 'Compile time options:' | cut -d: -f2
```

--------------------------------

### Configure Global Data Volume Quotas (UCI)

Source: https://opennds.readthedocs.io/en/stable/traffic.html

Set global data volume quotas in kB. A value of 0 means no limit. These can be overridden for individual clients.

```uci
option uploadquota '0'
option downloadquota '0'
```

--------------------------------

### Configure Generic Linux Walled Garden Ports (Alternative)

Source: https://opennds.readthedocs.io/en/stable/walledgarden.html

Specify a restricted set of ports for Walled Garden access on generic Linux platforms by adding this line to the /etc/config/opennds file. This is an alternative syntax for port configuration.

```ini
walledgarden_port_list <port1> <port2> <port3> [......] <portN>
```

--------------------------------

### Authenticate Client

Source: https://opennds.readthedocs.io/en/stable/ndsctl.html

Authenticates a client using their IP or MAC address.

```bash
/usr/bin/ndsctl auth IP|MAC
```

--------------------------------

### Configure Gateway FQDN

Source: https://opennds.readthedocs.io/en/stable/clientstatus.html

Set the gatewayfqdn option to specify the URL for the client status page. Recommended format is two words separated by a period. Set to 'disable' to disable this feature.

```config
option gatewayfqdn 'my.status'
```

```config
option gatewayfqdn 'disable'
```

--------------------------------

### Set Local Log Mountpoint

Source: https://opennds.readthedocs.io/en/stable/config.html

Directs local logging to a specified mountpoint, such as '/logs'. Avoid using the router's built-in flash storage to prevent excessive wear and potential failure.

```config
option log_mountpoint '/logs'
```

--------------------------------

### Enable Users to Router Passthrough

Source: https://opennds.readthedocs.io/en/stable/config.html

Set this option to '1' to enable passthrough of user-to-router access rules to the system firewall. Use with caution as incorrect configuration can soft-brick the router.

```config
option users_to_router_passthrough '1'
```

--------------------------------

### Specify Deprecated Configuration File Path

Source: https://opennds.readthedocs.io/en/stable/config.html

This option is no longer supported and is ignored if present. It was previously used to specify a generic configuration file.

```config
option config '/etc/opennds/nds.conf'
```

--------------------------------

### Set Download Rate Limit

Source: https://opennds.readthedocs.io/en/stable/config.html

Configure the maximum download speed in kb/s for clients. A value of 0 means no limit. This can be overridden by FAS.

```config
option downloadrate '800'
```

--------------------------------

### Enable Firewall Restart Hook (OpenWrt)

Source: https://opennds.readthedocs.io/en/stable/config.html

Specific to OpenWrt, this option (defaulting to 1) enables openNDS to reinsert nftables into the FW4 ruleset when the firewall restarts.

```config
option fwhook_enabled '1'
```

--------------------------------

### Set Maximum Local Log Entries

Source: https://opennds.readthedocs.io/en/stable/config.html

Configures the maximum number of local log entries before rotation. Default is 100. Setting to '0' removes the limit. Be cautious with high values to avoid storage or RAM issues.

```config
option max_log_entries '1000'
```

--------------------------------

### Configure Data Rate Quotas (UCI)

Source: https://opennds.readthedocs.io/en/stable/traffic.html

Configure data rate quota thresholds and parameters for bursting intervals and bucket filter sizes. Defaults are provided for tuning.

```uci
ratecheckwindow (Default 2)
download_bucket_ratio (Default 10)
upload_bucket_ratio (Default 10)
max_download_bucket_size (Default 250)
max_upload_bucket_size (Default 250)
download_unrestricted_bursting (Default 0, disabled)
upload_unrestricted_bursting (Default 0, disabled)
downloadrate (Default 0, unlimited)
uploadrate (Default 0, unlimited)
```

--------------------------------

### Block Access for Authenticated Users (Manual)

Source: https://opennds.readthedocs.io/en/stable/config.html

Manually denies authenticated users access to specific external services by IP address or FQDN. Requires research for IP addresses and may be problematic with dynamic IPs.

```bash
list authenticated_users 'block udp port 8020 to 112.122.123.124'
```

```bash
list authenticated_users 'block tcp port 443 to mywebsite.com'
```

--------------------------------

### Set Upload Rate Limit

Source: https://opennds.readthedocs.io/en/stable/config.html

Configure the maximum upload speed in kb/s for clients. A value of 0 means no limit. This can be overridden by FAS.

```config
option uploadrate '200'
```

--------------------------------

### Set Download Bucket Ratio

Source: https://opennds.readthedocs.io/en/stable/config.html

Configure the ratio for download bucket size. Used with MaxDownloadBucketSize to control download rate limiting. Large values may consume significant memory.

```config
option download_bucket_ratio ‘5’
```

--------------------------------

### Define Custom Parameters in OpenWrt UCI

Source: https://opennds.readthedocs.io/en/stable/customparams.html

Use the 'list fas_custom_parameters_list' command in OpenWrt UCI to define custom parameters. Ensure values with spaces or special characters are URL-encoded.

```bash
list fas_custom_parameters_list 'location=main_building'
list fas_custom_parameters_list 'admin_email=norman@bates-motel.com>'
list fas_custom_parameters_list 'logo_message=openNDS:%20Perfect%20on%20OpenWrt!'
list fas_custom_parameters_list 'banner1_message=BlueWave%20-%20Wireless%20Network%20Specialists'
list fas_custom_parameters_list 'banner2_message=HMS%20Pickle'
list fas_custom_parameters_list 'banner3_message=SeaWolf%20Cruiser%20Racer'
```

--------------------------------

### Configure Rate Check Window

Source: https://opennds.readthedocs.io/en/stable/config.html

Sets the window size for calculating the client data rate using a moving average. The window size is equal to ratecheckwindow times checkinterval (seconds).

```config
option ratecheckwindow '3'
```

--------------------------------

### Define Custom Files for FAS Integration

Source: https://opennds.readthedocs.io/en/stable/customparams.html

Configure custom files for FAS using 'list fas_custom_files_list'. Similar to custom images, this maps a name to a URL for FAS to utilize.

```bash
list fas_custom_files_list 'advert1_htm=https://raw.githubusercontent.com/openNDS/openNDS/v9.5.0/resources/bannerpickle.htm'
```

--------------------------------

### Specify Custom Status Page Script

Source: https://opennds.readthedocs.io/en/stable/clientstatus.html

Use the statuspath configuration option to specify an alternate script for generating the client status page. Ensure the script is executable.

```config
option statuspath '/usr/lib/opennds/custom_status.sh'
```

--------------------------------

### Allow Access for Authenticated Users

Source: https://opennds.readthedocs.io/en/stable/config.html

Grants specific access to authenticated users. Rules are applied in order. Use for granting access to web sites or specific services.

```bash
list authenticated_users 'allow all'
```

```bash
list authenticated_users 'allow tcp port 443'
```

```bash
list authenticated_users 'allow udp port 5000 to 123.1.1.1'
```

--------------------------------

### Define Custom Images for ThemeSpec

Source: https://opennds.readthedocs.io/en/stable/customize.html

Specify custom image files for ThemeSpec pages, providing the URL for each image.

```shell
list fas_custom_images_list 'logo_png=https://openwrt.org/_media/logo.png'
```

```shell
list fas_custom_images_list 'banner1_jpg=https://raw.githubusercontent.com/openNDS/openNDS/9.0.0/resources/bannerbw.jpg'
```

```shell
list fas_custom_images_list 'banner2_jpg=https://raw.githubusercontent.com/openNDS/openNDS/9.0.0/resources/bannerpickle.jpg'
```

```shell
list fas_custom_images_list 'banner3_jpg=https://raw.githubusercontent.com/openNDS/openNDS/9.0.0/resources/bannerseawolf.jpg'
```

--------------------------------

### Add Firewall Rule for Service Access (OpenWrt)

Source: https://opennds.readthedocs.io/en/stable/customize.html

Add a new firewall rule using UCI to allow access from users to a specific TCP port on the router.

```bash
uci add_list opennds.@opennds[0].users_to_router='allow
tcp port 8888'

```

--------------------------------

### Enable DHCP Option 114 (RFC8910)

Source: https://opennds.readthedocs.io/en/stable/config.html

This command enables DHCP option 114, which sends the 'default_url' in DHCP replies. This is required for RFC8910 Captive Portal Identification. Set to '1' to enable (default) or '0' to disable.

```bash
option dhcp_default_url_enable '0'
```

--------------------------------

### Configure Fair Usage Policy Throttle Rate (UCI)

Source: https://opennds.readthedocs.io/en/stable/traffic.html

Set upload/download throttle rates in kb/s for the Fair Usage Policy. If set to 0, clients are deauthenticated when volume quota is exceeded.

```uci
option fup_upload_throttle_rate '0'
option fup_download_throttle_rate '0'
```

--------------------------------

### set_key

Source: https://opennds.readthedocs.io/en/stable/libraries.html

Adds the 'faskey' option to the configuration file with the provided key. Returns an exit code of 0 always.

```APIDOC
## set_key

### Description
Adds option 'faskey' to the config file.

### Parameters
#### Path Parameters
- **arg1** (string) - Required - "set_key"
- **arg2** (string) - Required - The key to set.

### Returns
Exit code 0 always.
```

--------------------------------

### Specify Custom Binauth Script

Source: https://opennds.readthedocs.io/en/stable/binauth.html

Use the `option binauth` to specify a custom script. This will disable default functionality like `auth_restore`.

```config
option binauth '/usr/lib/opennds/my_binauth_script.sh'
```

--------------------------------

### Configure fas-hid.php for HTTP

Source: https://opennds.readthedocs.io/en/stable/fas.html

Configure fas-hid.php for HTTP enforcement, suitable for devices with limited resources. This script uses a digest of the client token for security. Adjust 'fasport', 'fasremoteip', and 'fasremotefqdn' as needed.

```ini
option fasport '80'
option faspath '/nds/fas-hid.php'
option fas_secure_enabled '1'
option faskey 'your_secret_hashed_key_string'
option fasremoteip '46.32.240.41'
option fasremotefqdn 'blue-wave.net'
```

--------------------------------

### Set Post-authentication Idle Timeout

Source: https://opennds.readthedocs.io/en/stable/config.html

Configure the time in minutes after which an idle client is disconnected if no network activity is detected. Default is 120 minutes.

```config
option authidletimeout '60'
```

--------------------------------

### Define Custom Parameters for ThemeSpec

Source: https://opennds.readthedocs.io/en/stable/themespec.html

Use 'list fas_custom_parameters_list' to define short text strings that can be used as titles for custom images within ThemeSpec HTML.

```bash
list fas_custom_parameters_list 'logo_message=openNDS: Perfect on OpenWrt!'
```

```bash
list fas_custom_parameters_list 'banner1_message=BlueWave - Wireless Network Specialists'
```

```bash
list fas_custom_parameters_list 'banner2_message=HMS Pickle'
```

```bash
list fas_custom_parameters_list 'banner3_message=SeaWolf Cruiser Racer'
```

--------------------------------

### Set ThemeSpec Path for Login Option 3

Source: https://opennds.readthedocs.io/en/stable/config.html

Specify the path to the ThemeSpec file when login_option_enabled is set to '3'. The ThemeSpec script generates dynamic splash pages and can reside anywhere accessible to OpenNDS.

```config
option themespec_path '/usr/lib/opennds/<filename>'
```

--------------------------------

### Configure OpenWrt Walled Garden Ports

Source: https://opennds.readthedocs.io/en/stable/walledgarden.html

Optionally, specify a list of IP ports for Walled Garden access on OpenWrt using UCI. This restricts access to the specified ports.

```bash
uci add_list opennds.@opennds[0].walledgarden_port_list='<port1> <port2> <port3> [......] <portN>'
```

--------------------------------

### Check openNDS Status and Logs

Source: https://opennds.readthedocs.io/en/stable/compile.html

Commands to check the status of the openNDS service and view system logs for troubleshooting.

```bash
sudo ndsctl status
```

```bash
sudo systemctl status opennds
```

```bash
sudo journalctl -e
```

--------------------------------

### Set Maximum Client Connections

Source: https://opennds.readthedocs.io/en/stable/config.html

Configure the maximum number of clients allowed to connect. This value should not exceed the router's DHCP lease limit.

```config
option maxclients '500'
```