Own IPTABLES deletec

Hello guys,
im using the actual FreePBX ISO image and i’ve got some own IPTABLES installed in /etc/rc.local
After some days the iptables are removed.
Which job could delete the iptables? Fail2Ban?

Best regards
Philip

iptables -I INPUT -p udp -s 0.0.0.0/0.0.0.0 --dport 6060 -j ACCEPT
iptables -I INPUT -p udp -s 0.0.0.0/0.0.0.0 --dport 10000:12000 -j ACCEPT
iptables -I INPUT -p tcp -s 0.0.0.0/0.0.0.0 --dport 443 -j ACCEPT
iptables -I INPUT -p icmp -s 0.0.0.0/0.0.0.0 -j ACCEPT
iptables -A INPUT -s 0.0.0.0/0.0.0.0 -j DROP -m state --state NEW