X-Trail Radio

“With the key turned to ACC or on, and the radio off, press (6) and the (Tune Seek ▼) together. This toggles the clock display on and off.

Then, to set the time, press the (Audio) for more than 3 seconds. The time will flash. Press the (1) to advance the hours and (2) to advance the minutes. Press (Audio) again once you have the correct time and the clock will be set.”

Persistant iptables

For debian 10…

apt install iptables-persistent
iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT
iptables -A INPUT -s -j ACCEPT
iptables -P INPUT DROP
dpkg-reconfigure iptables-persistent