Dear netfilter gurus, I am new to iptables. The computer on which I want to use iptables is a Redhat linux 7.3 with satellite pentanet card. I want to filter the traffice forwarded to our LAN. When I use iptables -P Forward DROP and iptables -A INPUT -m state --state RELATED, ESTABLISHED -j ACCEPT iptables -A Forward -m state --state RELATED, ESTABLISHED -j ACCEPT It still does not allow me to browse from the LAN. Outgoing is through router serial port. Much oblige for all your help. Regards.