iptables not starting after reboot on ubuntu server 20.04?

Question

linux

disabled ufw
sudo systemctl enable iptables
sudo systemctl enable iptables.services
Everything is fine after the restart the daemon does not start automatically

Answer 1

What demon? iptables is not a daemon. This service simply loads the saved rules from a file when it starts, and does nothing when it stops (or clears the tables, depending on the setting).
To save the currently loaded rules, just call netfilter-persistent save.
If after a reboot in iptables -L there are the necessary rules, then everything works correctly.