I am a newbie trying to create a firewall on RH9. I am using a script from the RH9 bible (p507). I am running a section at a time. What I have so far: # (1) Policies (default) iptables _P INPUT DROP iptables -P OUTPUT DROP iptables -P FORWARD DROP # (2) user-defined chain for ACCEPTED TCP packets iptables -N okay iptables -A okay -p TCP --syn -j ACCEPT iptables -A okay -p TCP -m state ESTABLISHED,RELATED -j ACCEPT iptables -A okay -p TCP -j DROP This line is giving me some grief: 'iptables -A okay -p TCP -m state ESTABLISHED,RELATED -j ACCEPT' Because I get this error when I run it. 'firescript: line 23: ESTABLISHED,RELATED: command not found' The author says this line "allows through packets associated with an ESTABLISHED connection (one that has already had traffic pass through the interface) or a RELATED connection (one that is starting a new connection related to an already-established connection) Are there other commands I could use or another line of script that would do the same job? Any help would be appreciated. Gun Caundle