How firewall-cmd reads text content

Question

I have a text file with the following content:

1.1.1.1
2.2.2.2
3.3.3.3
4.4.4.4

How to extract the content of each line and use it as a variable to allow firewall-cmd to read and write rules

Answer 1

firewall-cmd has flags --add-entries-from-file and --remove-entries-from-file to read from a text file.

Try something lie

firewall-cmd --permanent --ipset=xxx --add-entries-from-file=file.txt