|
|
#!/bin/bash
|
|
|
|
|
|
PATH=/usr/sbin:/bin:/sbin
|
|
|
|
|
|
# КОНФИГУРАЦИЯ СКРИПТА
|
|
|
EXTIF="eth1" #внешний интерфейс
|
|
|
INTIF="eth0" #внутренний интерфейс
|
|
|
|
|
|
TCPFORWARD="6100,5003,6000,443,5090"
|
|
|
UDPFORWARD="5003,5090,6000,30000:30015"
|
|
|
# адрес АТС
|
|
|
FORWARDIP="192.168.2.100"
|
|
|
# Список портов, открытых на сервере для внешнего мира
|
|
|
SERVICES="22,1723"
|
|
|
# порты, по которым пользователи могут вылазить в интернет
|
|
|
OPENPORTS="80,22,443,5190,995,465,5222,5223,20,21,8888,8086"
|
|
|
FW="iptables"
|
|
|
|
|
|
#Фильтрация форварда
|
|
|
add_white_ip() {
|
|
|
$FW -A FORWARD -s $1 -d $FORWARDIP -i $EXTIF -o $INTIF -j ACCEPT
|
|
|
}
|
|
|
|
|
|
|
|
|
prepare() {
|
|
|
echo 1 > /proc/sys/net/ipv4/ip_forward
|
|
|
modprobe ip_nat_irc ip_nat_ftp iptable_nat ip_conntrack_irc ip_conntrack_ftp ip_conntrack ip_tables
|
|
|
$FW -t filter -F
|
|
|
$FW -t nat -F
|
|
|
$FW -t mangle -F
|
|
|
$FW -X
|
|
|
}
|
|
|
|
|
|
filter() {
|
|
|
# INPUT
|
|
|
$FW -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
|
|
|
$FW -A INPUT -m state --state NEW -i ! $EXTIF -j ACCEPT
|
|
|
$FW -A INPUT -p icmp --icmp-type 8 -j ACCEPT
|
|
|
$FW -A INPUT -p tcp -m tcp -m multiport -i $EXTIF --dports $SERVICES -j ACCEPT
|
|
|
$FW -A INPUT -i $INTIF -j ACCEPT
|
|
|
$FW -P INPUT DROP
|
|
|
|
|
|
# FORWARD
|
|
|
$FW -A FORWARD -i $EXTIF -o $INTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
|
|
|
$FW -A FORWARD -i $INTIF -o $EXTIF -m state --state ESTABLISHED,RELATED -j ACCEPT
|
|
|
$FW -A FORWARD -s $FORWARDIP -i $INTIF -o $EXTIF -j ACCEPT
|
|
|
$FW -A FORWARD -d $FORWARDIP -i $EXTIF -o $INTIF -j ACCEPT
|
|
|
$FW -A FORWARD -o ppp0 -j ACCEPT
|
|
|
$FW -A FORWARD -i ppp0 -j ACCEPT
|
|
|
$FW -P FORWARD DROP
|
|
|
|
|
|
# OUTPUT
|
|
|
$FW -P OUTPUT ACCEPT
|
|
|
}
|
|
|
|
|
|
nat() {
|
|
|
# PREROUTING
|
|
|
$FW -t nat -A PREROUTING -p tcp -i $EXTIF -m multiport --dports $TCPFORWARD -j DNAT --to-destination $FORWARDIP #forward tcp
|
|
|
$FW -t nat -A PREROUTING -p udp -i $EXTIF -m multiport --dports $UDPFORWARD -j DNAT --to-destination $FORWARDIP #forward udp
|
|
|
# входящие пакеты с 80 портом с внутрннего интерфейса перенаправляются на прокси
|
|
|
$FW -t nat -A PREROUTING -i $INTIF -p tcp --dport 80 -j REDIRECT --to-port 3128
|
|
|
|
|
|
# POSTROUTING
|
|
|
$FW -t nat -A POSTROUTING -o $EXTIF -j MASQUERADE
|
|
|
}
|
|
|
|
|
|
|
|
|
main() {
|
|
|
prepare
|
|
|
filter
|
|
|
nat
|
|
|
}
|
|
|
|
|
|
main
|
