Solution 1:
Yes, you can use the old system. It's not less secure than firewalld (provided you write your firewall rules correctly). It also doesn't run a daemon, so it's not using a (relatively) large amount of your limited RAM.
Alternative to Firewalld on memory critical servers?
Solution 1:
Yes, you can use the old system. It's not less secure than firewalld (provided you write your firewall rules correctly). It also doesn't run a daemon, so it's not using a (relatively) large amount of your limited RAM.