UDM / UDMPro Boot Script

Features

Allows you to run a shell script at S95 anytime your UDM starts / reboots

All files described here are in the examples folder, automation is coming soon.

Compatiblity

Should work on any UDM/UDMPro after 1.6.3
Tested and confirmed on 1.6.6, 1.7.0, 1.7.2rc4

Steps

1. Make your script on the UDM/UDMPRO

vi /mnt/data/on_boot.sh 
chmod u+x /mnt/data/on_boot.sh

Example: see examples/udm-files/on_boot.sh

#!/bin/sh
podman start wpa_supplicant-udmpro

iptables -t nat -C PREROUTING -p udp ! --source 10.0.0.x ! --destination 10.0.0.x --dport 53 -j DNAT --to 10.0.0.x || iptables -t nat -A PREROUTING -p udp ! --source 10.0.0.x ! --destination 10.0.0.x --dport 53 -j DNAT --to 10.0.0.x
iptables -t nat -C PREROUTING -p tcp ! --source 10.0.0.x ! --destination 10.0.0.x --dport 53 -j DNAT --to 10.0.0.x || iptables -t nat -A PREROUTING -p tcp ! --source 10.0.0.x ! --destination 10.0.0.x --dport 53 -j DNAT --to 10.0.0.x
iptables -t nat -C POSTROUTING -j MASQUERADE || iptables -t nat -A POSTROUTING -j MASQUERADE

2. Make the unifios docker container execute this script on startup, this has to be done after every firmware update. It does persist through reboots.

Automatic

Copy install.sh and install-unifios.sh to your UDM
Execute install.sh

Manual

podman exec -it unifi-os sh

make a script that sshs to the udm and runs on our boot script

Example: examples/unifi-os-files/udm.sh

echo "#!/bin/sh
ssh -o StrictHostKeyChecking=no root@127.0.1.1 '/mnt/data/on_boot.sh'" > /etc/init.d/udm.sh # 127.0.1.1 always points to the UDM

make said script executable

chmod u+x /etc/init.d/udm.sh

make a service that runs on startup, after we have networking

Example: examples/unifi-os-files/udmboot.service

echo "[Unit]
Description=Run On Startup UDM

[Service]
After=network.target
ExecStart=/etc/init.d/udm.sh

[Install]
WantedBy=multi-user.target" > /etc/systemd/system/udmboot.service

enable it and test

systemctl enable udmboot
systemctl start udmboot

back to the udm

exit

reboot your udm/udmpro and make sure it worked

reboot
exit

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