/etc/init.d/iptables start

iptables -F

iptables -Z

iptables -X

iptables -L -n

sed -i ‘s#net.ipv4.ip_forward = 0#net.ipv4.ip_forward = 1#g’ /etc/sysctl.conf

sysctl -p

modprobe ip_tables

modprobe iptable_filter

modprobe iptable_nat

modprobe ip_conntrack

modprobe ip_conntrack_ftp

modprobe ip_nat_ftp

modprobe ipt_state

lsmod|grep ip|wc -l

iptables -t nat -A POSTROUTING -s 192.168.10.0/24 -o eth0 -j SNAT –to-source 192.168.80.104

或iptables -t nat -A POSTROUTING -s 192.168.10.0/24 -j MASQUERADE

/etc/init.d/iptables save或iptables-save >/etc/sysconfig/iptables