unifios-utilities/nextdns

Run NextDNS on your UDM

Features

1. Run PiHole on your UDM with a completely isolated network stack. This will not port conflict or be influenced by any changes on by Ubiquiti
2. Persists through reboots and firmware updates.

Requirements

1. You have setup the on boot script described here
2. PiHole persists through firmware updates. The on-boot script does not. If you update your FM setup on-boot again and everything should work.

Customization

• Feel free to change 20-dns.conflist to change the IP address of the container. Make sure to update all ip references and the iptables rules in on_boot.sh. The IP address can be anywhere from x.x.x.3 to x.x.x.254. .1 is reserved for the gateway and .2 is reserved for the macvlan bridge.
• If you don't want to use vlan5, just replace br5 with br(vlanid) in on_boot.sh and 20-dns.conflist, also update all the ips accordingly

Docker

The Dockerfile is included, you can build it locally on your UDM if you don't want to pull from Docker Hub

podman build ./Dockerfile -t nextdns-udm:latest"

Steps

1. On your controller, make a Corporate network with no DHCP server and give it a vlan. For this example we are using vlan 5.
2. Install the CNI plugins with by executing install-cni-plugins.sh on your UDM
3. Copy 20-dns.conflist to /mnt/data/podman/cni (or a place of your choosing and update on_boot.sh symlink). This will create your podman macvlan network
4. Update your on_boot.sh to include the commands in on_boot.sh. You can leave out the iptables rules if you don't want to DNAT all DNS calls to your PiHole
5. Execute on_boot.sh
6. Make /mnt/data/nextdns and copy nextdns.conf to it.
7. Run the nextdns docker container. The mounts are very important. Also please change the --dns arguments to whatever was provided by NextDNS.

 podman run -d --network dns \
    --name nextdns \
    -v "/mnt/data/nextdns/:/etc/nextdns/" \
    -v /var/run/dbus/system_bus_socket:/var/run/dbus/system_bus_socket \
    --mount type=bind,source=/config/dnsmasq.lease,target=/tmp/dnsmasq.leases \
    --dns=45.90.28.163 --dns=45.90.30.163 \
    --hostname nextdns \
    boostchicken/nextdns-udm:latest

8. Update your DNS Servers to 10.0.5.3 (or your custom ip) in all your DHCP configs.