How not to litter iptables with extra entries after applying iptables-save?

Question

iptables

1. Disabled firewalld
2. Applied iptables --flush
3. Checked iptables, - clean
4. Created a rule
5. Checked the entries, - only the necessary ones are present
6. Applied iptables-save > /etc/sysconfig/iptables
7. A bunch of extra entries appeared that you don't want to see.
CHADNT?

Answer 1

in centos 7, firewalld works by default - a shell for iptables
systemctl stop firewalld
yum remove -y firewalld
after this, the rules in iptables will look familiar to you)