26 lines
999 B
Bash
Executable file
26 lines
999 B
Bash
Executable file
#!/bin/sh
|
|
|
|
IPT=/usr/sbin/iptables
|
|
|
|
for T in filter nat mangle ; do
|
|
$IPT -t $T -F
|
|
$IPT -t $T -X
|
|
done
|
|
|
|
$IPT -t filter -A INPUT -m state --state INVALID -j DROP
|
|
$IPT -t filter -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
|
|
$IPT -t filter -A INPUT -p icmp -j ACCEPT
|
|
$IPT -t filter -A INPUT -i vlan1 -p tcp -j REJECT --reject-with tcp-reset
|
|
$IPT -t filter -A INPUT -i vlan1 -j REJECT --reject-with icmp-port-unreachable
|
|
$IPT -t filter -A FORWARD -m state --state INVALID -j DROP
|
|
$IPT -t filter -A FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT
|
|
$IPT -t filter -A FORWARD -i vlan1 -m state --state NEW,INVALID -j DROP
|
|
|
|
$IPT -t nat -A POSTROUTING -o vlan1 -j MASQUERADE
|
|
|
|
echo "1" >/proc/sys/net/ipv4/ip_forward
|
|
echo "1" >/proc/sys/net/ipv4/icmp_echo_ignore_broadcasts
|
|
echo "1" >/proc/sys/net/ipv4/icmp_ignore_bogus_error_responses
|
|
echo "30" >/proc/sys/net/ipv4/tcp_fin_timeout
|
|
echo "120" >/proc/sys/net/ipv4/tcp_keepalive_time
|
|
echo "0" >/proc/sys/net/ipv4/tcp_timestamps
|