Meu Conf

magnored
(usa CentOS)

Enviado em 01/05/2009 - 09:36h

Galera... analisem meu conf... sou novato ainda na area... alguem pode dar um dica de segurança q eu posso usar a mais..como bloquear virus internamente e externamente... essas coisas..

eu uso esse firewall para compartilhar a internet tbm...

#!/bin/sh

MP=/sbin/modprobe
RM=/sbin/rmmod
IPT=/sbin/iptables
ECHO=/bin/echo

$MP ip_tables
$MP iptable_filter
$MP ip_conntrack
$MP ipt_state
$MP iptable_nat
$MP ipt_MASQUERADE
$MP ipt_REJECT
$MP ipt_REDIRECT
$MP ipt_multiport

$ECHO "1" > /proc/sys/net/ipv4/ip_forward

# Limpa Tudo
$IPT -F
$IPT -X
$IPT -t nat -F
$IPT -t nat -X

$IPT -A INPUT -s 127.0.0.0/8 -j ACCEPT

# Libera Portas do Servidor
$IPT -A INPUT -p tcp -m multiport --dport 20,21,22,25,53,80,110,113,3126,161,3401,8291,5900 -j ACCEPT
$IPT -A INPUT -p udp --dport 53 -j ACCEPT
$IPT -A INPUT -p udp --dport 161 -j ACCEPT
$IPT -A INPUT -s 192.168.0.0/24 -p tcp -m multiport --dport 137,138,139,161 -j ACCEPT
$IPT -A INPUT -s 192.168.0.0/24 -p udp -m multiport --dport 137,138,139,161 -j ACCEPT
$IPT -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

# Forward
$IPT -A FORWARD -j ACCEPT -i eth0 -s 192.168.0.0/24
$IPT -A FORWARD -j ACCEPT -i eth1 -s 192.168.0.0/24
$IPT -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT


# Nat/Masquerading
$IPT -t nat -A POSTROUTING -s 192.168.0.0/24 -o eth0 -j MASQUERADE
$IPT -t nat -A POSTROUTING -s 192.168.0.0/24 -o eth1 -j MASQUERADE

#Habilitando o Proxy Transparente ( Squid )
$IPT -t nat -A PREROUTING -s 192.168.0.0/24 -p tcp --dport 80 -j DNAT --to-dest 192.168.0.1:3126