Hi, I am trying to modify a fw script that would work for my small lan, except I need to change references of static IP and SNAT. to eth0 and MASQUERADE, - but when I run the script it gives me Bad argument `eth0' The script is below, with my notes on changes I've made so far. Any help greatly appreciated. #(1) Policies (default) - modified with notation 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 --state ESTABLISHED,RELATED -j ACCEPT iptables -A okay -p TCP -j DROP # (3) INPUT chain rules # Rules for incoming packets from LAN iptables -A INPUT -p ALL -i eth1 -s 192.168.0.0/16 -j ACCEPT iptables -A INPUT -p ALL -i lo -s 127.0.0.1 -j ACCEPT iptables -A INPUT -p ALL -i lo -s 192.168.1.1 -j ACCEPT iptables -A INPUT -p ALL -i lo -s -i eth0 -j ACCEPT ## WAS -> ... 123.45.67.89 -j ACCEPT iptables -A INPUT -p ALL -i eth1 -d 192.168.0.255 -j ACCEPT # Rules for incoming packets from Internet # Packets for established connections iptables -A INPUT -p ALL -d -i eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT ## WAS - > ... -d 123.45.67.89 -m... # TCP Rules (edit as services needed) iptables -A INPUT -p TCP -i eth0 -s 0/0 --destination-port 21 -j okay iptables -A INPUT -p TCP -i eth0 -s 0/0 --destination-port 22 -j okay iptables -A INPUT -p TCP -i eth0 -s 0/0 --destination-port 80 -j okay iptables -A INPUT -p TCP -i eth0 -s 0/0 --destination-port 443 -j okay # UDP Rules # iptables -A INPUT -p UDP -i eth0 -s 0/0 --destination-port 53 -j okay # iptables -A INPUT -p UDP -i eth0 -s 0/0 --destination-port 2074 -j okay # ICMP rules iptables -A INPUT -p ICMP -i eth0 -s 0/0 --icmp-type 8 -j ACCEPT iptables -A INPUT -p ICMP -i eth0 -s 0/0 --icmp-type 11 -j ACCEPT # (4) FORWARD chain rules # Accept the packets we want to forward iptables -A FORWARD -i eth1 -j ACCEPT iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT # (5) OUTPUT chain rules # Only output packets with local addresses (no spoofing) iptables -A OUTPUT -p ALL -s 127.0.0.1 -j ACCEPT iptables -A OUTPUT -p ALL -s 192.168.1.1 -j ACCEPT iptables -A OUTPUT -p ALL -s -i eth0 -j ACCEPT ## WAS -> ... 123.45.67.89 -j ACCEPT # (6) POSTROUTING chain rules iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE ## was -> ... -j SNAT --to-source 123.45.67.89 __________________________________ Do you Yahoo!? Yahoo! Mail Address AutoComplete - You start. We finish. http://promotions.yahoo.com/new_mail
