rendered paste body#!/bin/sh
# Variáveis
echo " "
echo " "
echo " "
echo " "
# Variaveis
# -------------------------------------------------------#
iptables="/usr/sbin/iptables"
IF_EXTERNA="eth0"
IF_INTERNA="eth1"
echo "----------------------------------------------------"
echo "==========>>> Rede Externa - Internet <<<=========="
echo $IF_EXTERNA
echo "----------------------------------------------------"
echo " "
echo " "
echo "----------------------------------------------------"
echo "==========>>> Rede Interna - Empresa <<<=========="
echo $IF_INTERNA
echo "----------------------------------------------------"
# Ativa módulos
# -------------------------------------------------------#
/sbin/modprobe ip_conntrack
/sbin/modprobe ip_conntrack_ftp
/sbin/modprobe ip_nat_ftp
/sbin/modprobe ip_queue
/sbin/modprobe ip_tables
/sbin/modprobe ipt_LOG
/sbin/modprobe ipt_MARK
/sbin/modprobe ipt_MASQUERADE
/sbin/modprobe ipt_MIRROR
/sbin/modprobe ipt_REDIRECT
/sbin/modprobe ipt_REJECT
/sbin/modprobe ipt_TCPMSS
/sbin/modprobe ipt_TOS
/sbin/modprobe ipt_limit
/sbin/modprobe ipt_mac
/sbin/modprobe ipt_mark
/sbin/modprobe ipt_multiport
/sbin/modprobe ipt_owner
/sbin/modprobe ipt_state
/sbin/modprobe ipt_tcpmss
/sbin/modprobe ipt_tos
/sbin/modprobe ipt_unclean
/sbin/modprobe iptable_filter
/sbin/modprobe iptable_mangle
/sbin/modprobe iptable_nat
# Ativa roteamento no kernel
# -------------------------------------------------------#
echo "1" > /proc/sys/net/ipv4/ip_forward
# Proteção contra IP spoofing
# -------------------------------------------------------#
echo "1" > /proc/sys/net/ipv4/conf/all/rp_filter
# protecao conta ping
#---------------------------------------------------------#
# echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all
# Zera regras
# -------------------------------------------------------#
$iptables -F
$iptables -X
$iptables -F -t nat
$iptables -X -t nat
$iptables -F -t mangle
$iptables -X -t mangle
# Determina a política padrão
# -------------------------------------------------------#
$iptables -P INPUT DROP
$iptables -P OUTPUT DROP
$iptables -P FORWARD DROP
#################################################
# Tabela FILTER
#################################################
# echo "Dropando TCP Indesejavel"
# Dropa pacotes TCP indesejáveis
# -------------------------------------------------------#
$iptables -A FORWARD -p tcp ! --syn -m state --state NEW -j LOG --log-level 6 --log-prefix "FWL: NEW sem syn: "
$iptables -A FORWARD -p tcp ! --syn -m state --state NEW -j DROP
# echo "Dropa Pacote Mal Formado"
# Dropa pacotes mal formados
# -------------------------------------------------------#
$iptables -A INPUT -i $IF_EXTERNA -m unclean -j LOG --log-level 6 --log-prefix "FWL: pacote mal formado: "
$iptables -A INPUT -i $IF_EXTERNA -m unclean -j DROP
# echo "Aceitando Pacotes que Devem Entrar!"
# Aceita os pacotes que realmente devem entrar
# -------------------------------------------------------#
$iptables -A INPUT -i ! $IF_EXTERNA -j ACCEPT
$iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
$iptables -A OUTPUT -m state --state ESTABLISHED,RELATED,NEW -j ACCEPT
$iptables -A FORWARD -m state --state ESTABLISHED,RELATED,NEW -j ACCEPT
#echo "trinoo"
# Proteção contra trinoo
# -------------------------------------------------------#
$iptables -N TRINOO
$iptables -A TRINOO -m limit --limit 15/m -j LOG --log-level 6 --log-prefix "FWL: trinoo: "
$iptables -A TRINOO -j DROP
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 27444 -j TRINOO
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 27665 -j TRINOO
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 31335 -j TRINOO
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 34555 -j TRINOO
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 35555 -j TRINOO
# echo "trojan"
# Proteção contra tronjans
# -------------------------------------------------------#
$iptables -N TROJAN
$iptables -A TROJAN -m limit --limit 15/m -j LOG --log-level 6 --log-prefix "FWL: trojan: "
$iptables -A TROJAN -j DROP
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 666 -j TROJAN
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 4000 -j TROJAN
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 6000 -j TROJAN
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 6006 -j TROJAN
$iptables -A INPUT -p TCP -i $IF_EXTERNA --dport 16660 -j TROJAN
# echo "worms"
# Proteção contra worms
# -------------------------------------------------------#
$iptables -A FORWARD -p tcp --dport 135 -i $IF_INTERNA -j REJECT
# SAMBA
# $iptables -I INPUT -i $IF_EXTERNA -p TCP --dport 445 -j REJECT
# $iptables -I OUTPUT -i $IF_EXTERNA -p TCP --dport 445 -j REJECT
# $iptables -I FORWARD -i $IF_EXTERNA -p TCP --dport 445 -j REJECT
# echo "syn-flood"
# Proteção contra syn-flood
# -------------------------------------------------------#
$iptables -A FORWARD -p tcp --syn -m limit --limit 2/s -j ACCEPT
# echo "ping-die"
# Proteção contra ping da morte
# -------------------------------------------------------#
$iptables -A FORWARD -p icmp --icmp-type echo-request -m limit --limit 1/s -j ACCEPT
# Proteção contra port scanners
# -------------------------------------------------------#
$iptables -N SCANNER
$iptables -A SCANNER -m limit --limit 15/m -j LOG --log-level 6 --log-prefix "FWL: port scanner: "
$iptables -A SCANNER -j DROP
$iptables -A INPUT -p tcp --tcp-flags ALL FIN,URG,PSH -i $IF_EXTERNA -j SCANNER
$iptables -A INPUT -p tcp --tcp-flags ALL NONE -i $IF_EXTERNA -j SCANNER
$iptables -A INPUT -p tcp --tcp-flags ALL ALL -i $IF_EXTERNA -j SCANNER
$iptables -A INPUT -p tcp --tcp-flags ALL FIN,SYN -i $IF_EXTERNA -j SCANNER
$iptables -A INPUT -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -i $IF_EXTERNA -j SCANNER
$iptables -A INPUT -p tcp --tcp-flags SYN,RST SYN,RST -i $IF_EXTERNA -j SCANNER
$iptables -A INPUT -p tcp --tcp-flags SYN,FIN SYN,FIN -i $IF_EXTERNA -j SCANNER
# Loga tentativa de acesso a determinadas portas
# -------------------------------------------------------#
$iptables -A INPUT -p tcp --dport 21 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FWL: ftp: "
$iptables -A INPUT -p tcp --dport 23 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FWL: telnet: "
$iptables -A INPUT -p tcp --dport 25 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FWL: smtp: "
$iptables -A INPUT -p tcp --dport 80 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FWL: http: "
$iptables -A INPUT -p tcp --dport 110 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FWL: pop3: "
$iptables -A INPUT -p udp --dport 111 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FWL: rpc: "
$iptables -A INPUT -p tcp --dport 113 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FWL: identd: "
$iptables -A INPUT -p tcp --dport 137:139 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FWL: samba: "
$iptables -A INPUT -p udp --dport 137:139 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FWL: samba: "
$iptables -A INPUT -p tcp --dport 161:162 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FWL: snmp: "
$iptables -A INPUT -p tcp --dport 6667:6668 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FWL: irc: "
$iptables -A INPUT -p tcp --dport 3128 -i $IF_EXTERNA -j LOG --log-level 6 --log-prefix "FWL: squid: "
# Libera acesso externo a determinadas portas
# -------------------------------------------------------#
# $iptables -A INPUT -p tcp --dport 2222 -i $IF_EXTERNA -j ACCEPT
# Liberando DPI para Lucas
# -------------------------------------------------------#
# $iptables -A FORWARD -i $IF_EXTERNA -p TCP --dport 24001 -j ACCEPT
# $iptables -A FORWARD -i $IF_INTERNA -p TCP --dport 24001 -j ACCEPT
# $iptables -I FORWARD -i $IF_EXTERNA -p tcp --dport 21 -j ACCEPT
# $iptables -I FORWARD -i $IF_EXTERNA -p tcp --dport 24001 -j ACCEPT
# #$iptables -A FORWARD -p tcp -d ! XXX.XXX.XXX.XXX --dport 25
#$iptables -I INPUT -p tcp --dport 20 -j ACCEPT
#$iptables -I INPUT -p tcp --dport 21 -j ACCEPT
#$iptables -I INPUT -p tcp --dport 24000 -j ACCEPT
#$iptables -I INPUT -p tcp --dport 24001 -j ACCEPT
#$iptables -I INPUT -p tcp --dport 24002 -j ACCEPT
#$iptables -I OUTPUT -p tcp --dport 20 -j ACCEPT
#$iptables -I OUTPUT -p tcp --dport 21 -j ACCEPT
#$iptables -I OUTPUT -p tcp --dport 24000 -j ACCEPT
#$iptables -I OUTPUT -p tcp --dport 24001 -j ACCEPT
#$iptables -I OUTPUT -p tcp --dport 24002 -j ACCEPT
#$iptables -I FORWARD -p tcp --dport 20 -j ACCEPT
#$iptables -I FORWARD -p tcp --dport 21 -j ACCEPT
#$iptables -I FORWARD -p tcp --dport 24000 -j ACCEPT
#$iptables -I FORWARD -p tcp --dport 24001 -j ACCEPT
#$iptables -I FORWARD -p tcp --dport 24002 -j ACCEPT
#$iptables -I INPUT -p tcp --dport 20 -j ACCEPT
#$iptables -I INPUT -p tcp --dport 21 -j ACCEPT
#$iptables -I INPUT -p tcp --dport 24000 -j ACCEPT
#$iptables -I INPUT -p tcp --dport 24001 -j ACCEPT
#$iptables -I INPUT -p tcp --dport 24002 -j ACCEPT
#$iptables -I OUTPUT -p tcp --dport 20 -j ACCEPT
#$iptables -I OUTPUT -p tcp --dport 21 -j ACCEPT
#$iptables -I OUTPUT -p tcp --dport 24000 -j ACCEPT
#$iptables -I OUTPUT -p tcp --dport 24001 -j ACCEPT
#$iptables -I OUTPUT -p tcp --dport 24002 -j ACCEPT
#$iptables -I FORWARD -p tcp --dport 20 -j ACCEPT
#$iptables -I FORWARD -p tcp --dport 21 -j ACCEPT
#$iptables -I FORWARD -p tcp --dport 24000 -j ACCEPT
#$iptables -I FORWARD -p tcp --dport 24001 -j ACCEPT
#$iptables -I FORWARD -p tcp --dport 24002 -j ACCEPT
#Regras que me passaram no underlinux
$iptables -I FORWARD -p tcp -s 192.168.0.3 -d 0/0 --dport 20 -j ACCEPT
$iptables -I FORWARD -p tcp -d 192.168.0.3 -s 0/0 --dport 20 -j ACCEPT
$iptables -I FORWARD -p udp -s 192.168.0.3 -d 0/0 --dport 20 -j ACCEPT
$iptables -I FORWARD -p udp -d 192.168.0.3 -s 0/0 --dport 20 -j ACCEPT
$iptables -I FORWARD -p tcp -s 192.168.0.3 -d 0/0 --dport 21 -j ACCEPT
$iptables -I FORWARD -p tcp -d 192.168.0.3 -s 0/0 --dport 21 -j ACCEPT
$iptables -I FORWARD -p udp -s 192.168.0.3 -d 0/0 --dport 21 -j ACCEPT
$iptables -I FORWARD -p udp -d 192.168.0.3 -s 0/0 --dport 21 -j ACCEPT
$iptables -I FORWARD -p tcp -s 192.168.0.3 -d 0/0 --dport 24001 -j ACCEPT
iptables -I FORWARD -p tcp -d 192.168.0.3 -s 0/0 --dport 24001 -j ACCEPT
$iptables -I FORWARD -p udp -s 192.168.0.3 -d 0/0 --dport 24001 -j ACCEPT
$iptables -I FORWARD -p udp -d 192.168.0.3 -s 0/0 --dport 24001 -j ACCEPT
#################################################
# Tabela NAT
#################################################
# Ativa mascaramento de saída roteamento
# -------------------------------------------------------#
$iptables -A POSTROUTING -t nat -o $IF_EXTERNA -j MASQUERADE
# Proxy transparente
# -------------------------------------------------------#
$iptables -t nat -A PREROUTING -i $IF_INTERNA -p TCP -d ! 200.201.174.0/24 --dport 80 -j REDIRECT --to-port 3128