Fw_Alex

echo "| Rio 18 Abril 2012"
echo "| Uso: firewall start|stop|restart"
iptables=/sbin/iptables
IF_EXTERNA=eth0
IF_INTERNA=eth1
/sbin/modprobe iptable_nat
/sbin/modprobe ip_conntrack
/sbin/modprobe ip_conntrack_ftp
/sbin/modprobe ip_nat_ftp
/sbin/modprobe ipt_LOG
/sbin/modprobe ipt_REJECT
/sbin/modprobe ipt_MASQUERADE
echo 1 > /proc/sys/net/ipv4/ip_forward
echo 1 > /proc/sys/net/ipv4/conf/all/rp_filter
iptables -F
iptables -X
iptables -F -t nat
iptables -X -t nat
iptables -F -t mangle
iptables -X -t mangle
iptables -P INPUT DROP
iptables -P OUTPUT DROP
iptables -P FORWARD DROP
iptables -A FORWARD -p tcp ! --syn -m state --state NEW -j LOG --log-level 6 --log-prefix "FIREWALL: NEW sem syn: "
iptables -A FORWARD -p tcp ! --syn -m state --state NEW -j DROP
echo "CHEGOU ATE AQUI"
sleep 200
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
iptables -N TRINOO
iptables -A TRINOO -m limit --limit 15/m -j LOG --log-level 6 --log-prefix "FIREWALL: 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
iptables -N TROJAN
iptables -A TROJAN -m limit --limit 15/m -j LOG --log-level 6 --log-prefix "FIREWALL: 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 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
iptables -A FORWARD -p tcp --dport 135 -i IF_INTERNA -j REJECT
iptables -A FORWARD -p tcp --syn -m limit --limit 2/s -j ACCEPT
iptables -A FORWARD -p icmp --icmp-type echo-request -m limit --limit 1/s -j ACCEPT
iptables -N SCANNER
iptables -A SCANNER -m limit --limit 15/m -j LOG --log-level 6 --log-prefix "FIREWALL: 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
iptables -A INPUT -p tcp --dport 21 -i IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: ftp: "
iptables -A INPUT -p tcp --dport 23 -i IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: telnet: "
iptables -A INPUT -p tcp --dport 25 -i IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: smtp: "
iptables -A INPUT -p tcp --dport 80 -i IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: http: "
iptables -A INPUT -p tcp --dport 110 -i IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: pop3: "
iptables -A INPUT -p udp --dport 111 -i IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: rpc: "
iptables -A INPUT -p tcp --dport 113 -i IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: identd: "
iptables -A INPUT -p tcp --dport 137:139 -i IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: samba: "
iptables -A INPUT -p udp --dport 137:139 -i IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: samba: "
iptables -A INPUT -p tcp --dport 161:162 -i IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: snmp: "
iptables -A INPUT -p tcp --dport 6667:6668 -i IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: irc: "
iptables -A INPUT -p tcp --dport 3128 -i IF_EXTERNA -j LOG --log-level 6 --log-prefix "FIREWALL: squid: "
iptables -A INPUT -p tcp --dport 22 -i IF_EXTERNA -j ACCEPT
iptables -A POSTROUTING -t nat -o IF_EXTERNA -j MASQUERADE
iptables -t nat -A PREROUTING -i IF_INTERNA -p tcp --dport 80 -j REDIRECT --to-port 3128
iptables -t nat -A PREROUTING -i IF_INTERNA -p tcp --dport 8080 -j REDIRECT --to-port 3128