Hi, I basically want to create a shell script that reads in the /etc/sysconfig/iptables. When it sees the line "-A INPUT -j REJECT --reject-with icmp-host-prohibited" it will create a new line before it and add in the line from another file which will have "-A INPUT -p udp -m udp --dport 27020 -j ACCEPT"
So it will look like:
# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -p udp -m udp --dport 27020 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT