[benedikt]

https://manpages.debian.org/stretch/iptables/iptables-apply....

Or use `at` to run `iptables-restore`. Simpler than setting up a cronjob (and if youre doing it manually, cron has a bunch of gotchas that at least bite me in the ass once in a blue moon).

[lazyant]

Yes. Although iirc (it may have changed, haven't looked "recently" the iptable- commands are distro specific, as in not all of them have / had them).