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麻烦版主和大家都帮忙看看,谢谢!!
#!/bin/bash
echo "1" > /proc/sys/net/ipv4/ip_forward
INET_IFACE="eth1"
INET_IP="192.168.136.254"
LAN_IFACE="eth0"
LAN_IP="192.168.135.254"
LAN_IP_RANGE="192.168.135.0/24"
IPT="/sbin/iptables"
/sbin/depmod -a
/sbin/modprobe ip_tables
/sbin/modprobe iptable_nat
/sbin/modprobe ip_net_ftp
/sbin/modprobe ipt_LOG
$IPT -P INPUT ACCEPT
$IPT -P FORWARD ACCEPT
$IPT -P OUTPUT ACCEPT
$IPT -t nat -P PREROUTING ACCEPT
$IPT -t nat -P POSTROUTING ACCEPT
$IPT -t nat -P OUTPUT ACCEPT
for TABLE in filter nat mangle ; do
$IPT -t $TABLE -F
$IPT -t $TABLE -X
done
$IPT -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
for DNS in $(grep ^n /etc/resolv.vonf|awk '{print $2}'); do
$IPT -A INPUT -p udp -s $DNS --sport domain -j ACCEPT
done
$IPT -N LOGDENY
$IPT -A LOGDENY -j LOG --log-prefix "iptables:"
$IPT -A LOGDENY -j DROP
$IPT -A INPUT -i ! lo -m state --state NEW,INVALID -j LOGDENY
if [ "$INET_IFACE" = ppp0 ] ; then
$IPT -t nat -A POSTROUTING -o $INET_IFACE -j MASQUERADE
else
$IPT -t nat -A POSTROUTING -o $INET_IFACE -j SNAT --to $INET_IP
fi |
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