tf_INPUT.mod

# ----------------------------------------------------------------------------
# TuxFrw 2.61
# Copyright (C) 2001-2005 Marcelo Gondim (http://tuxfrw.sourceforge.net)
# ----------------------------------------------------------------------------
#
# tf_INPUT.mod - TuxFrw main rules module
#
# ----------------------------------------------------------------------------
#
# This file is part of TuxFrw
#
# TuxFrw is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
# ----------------------------------------------------------------------------

#
# INPUT chains
#

############################## Insira aqui as suas regras ######################

# Zabbix agent
$IPTABLES -A INPUT -s $INT_NET -p tcp --dport 10050 -j $TARGET


# Libera conexoes ao MSN proxy
$IPTABLES -A INPUT -s $INT_NET -p tcp --dport 1863 -j $TARGET
$IPTABLES -A INPUT -s $INT_NET -p tcp --dport 25000:30000 -j $TARGET

# web interface do monit
$IPTABLES -A INPUT -p tcp --dport 2008 -j $TARGET
$IPTABLES -A INPUT -p tcp --dport 22 -j $TARGET


# Libera acesso ao NTOP
$IPTABLES -A INPUT -p tcp --dport 3000 -j $TARGET

# Libera acesso ao MySQL
$IPTABLES -A INPUT -s 192.168.1.0/24 -d 192.168.1.1 -p tcp --dport 3306 -j $TARGET

# Libera acesso ao Webserver a partir da Internet
$IPTABLES -A INPUT -p tcp -m multiport --dports 80,443,22,3389,3054 -j $TARGET

# Libera acesso ao Tomcat a partir da Internet
$IPTABLES -A INPUT -p tcp --dport 8080 -j $TARGET


# Libera acesso ao servidor de FTP local
$IPTABLES -A INPUT -p tcp -m multiport --dports 20,21,22,3389  -j $TARGET

# Libera acesso ao cache de DNS
$IPTABLES -A INPUT -s 192.168.1.0/24 -p udp --dport 53 -j $TARGET
$IPTABLES -A INPUT -s 192.168.1.0/24 -p tcp --dport 53 -j $TARGET

# Libera acesso interno e externo ao SSH ( roda na porta 7521 e 22 )
$IPTABLES -A INPUT -p tcp -m multiport --dports 22,7521 -j $TARGET

# Aceita conexoes ao proxy
$IPTABLES -A INPUT -s 192.168.1.0/24 -p tcp --dport 3128 -j $TARGET

# Aceita ping da rede internet
$IPTABLES -A INPUT -p icmp -j $TARGET

# NFS para o servdados
$IPTABLES -A INPUT -s 192.168.1.200 -j $TARGET

################################################################################


# accept input packets with allowed state
$IPTABLES -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT

# accept input packets from LO_IFACE
$IPTABLES -A INPUT -i $LO_IFACE -j ACCEPT

# Drop invalid packets
$IPTABLES -A INPUT -m state --state INVALID -j DROP

# deny input broadcast and improper address
$IPTABLES -A INPUT -s $BRO_ADDR   -j DROP
$IPTABLES -A INPUT -s 224.0.0.0/4 -j DROP

# SPOOF_CHECK input packets
if [ "$EXT_IFACE" != "" -a "$EXT_IP"  != "" ]; then $IPTABLES -A INPUT -s $EXT_IP  -j DROP; fi
if [ "$EXT_IFACE" != "" -a "$EXT_BRO" != "" ]; then $IPTABLES -A INPUT -s $EXT_BRO -j DROP; fi
if [ "$EXT_IFACE" != "" -a "$EXT_NET" != "" ]; then $IPTABLES -A INPUT -s $EXT_NET -i ! $EXT_IFACE -j DROP; fi
if [ "$INT_IFACE" != "" -a "$INT_IP"  != "" ]; then $IPTABLES -A INPUT -s $INT_IP  -j DROP; fi
if [ "$INT_IFACE" != "" -a "$INT_BRO" != "" ]; then $IPTABLES -A INPUT -s $INT_BRO -j DROP; fi
if [ "$INT_IFACE" != "" -a "$INT_NET" != "" ]; then $IPTABLES -A INPUT -s $INT_NET -i ! $INT_IFACE -j DROP; fi
if [ "$DMZ_IFACE" != "" -a "$DMZ_IP"  != "" ]; then $IPTABLES -A INPUT -s $DMZ_IP  -j DROP; fi
if [ "$DMZ_IFACE" != "" -a "$DMZ_BRO" != "" ]; then $IPTABLES -A INPUT -s $DMZ_BRO -j DROP; fi
if [ "$DMZ_IFACE" != "" -a "$DMZ_NET" != "" ]; then $IPTABLES -A INPUT -s $DMZ_NET -i ! $DMZ_IFACE -j DROP; fi
if [ "$EXT_IFACE" != "" ]; then
   # END_SPOOF packets that claims to be from IANA reserved nets
   for NET in $RESERVED_NET; do
       $IPTABLES -A INPUT -s $NET -i $EXT_IFACE -j DROP
   done
fi

# block tcp synfloods
$IPTABLES -A INPUT -p tcp -m tcp --tcp-flags ALL FIN,URG,PSH -j DROP
$IPTABLES -A INPUT -p tcp -m tcp --tcp-flags SYN,RST SYN,RST -j DROP
$IPTABLES -A INPUT -p tcp -m tcp --tcp-flags SYN,FIN SYN,FIN -j DROP
$IPTABLES -A INPUT -p tcp -m tcp --tcp-flags ALL NONE        -j DROP
$IPTABLES -A INPUT -p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -j DROP

# Block broadcast and multicast packets
$IPTABLES -A INPUT -m pkttype --pkt-type broadcast -j DROP
$IPTABLES -A INPUT -m pkttype --pkt-type multicast -j DROP

# reset auth packets
$IPTABLES -A INPUT -p tcp --dport 113 -j REJECT --reject-with tcp-reset

# Drop windows or worm packets :)
$IPTABLES -A INPUT -p udp -m multiport --dports 135,445 -j DROP
$IPTABLES -A INPUT -p udp -m udp --dport 137:139 -j DROP
$IPTABLES -A INPUT -p udp -m udp --sport 137 --dport 1024:65535 -j DROP
$IPTABLES -A INPUT -p tcp -m multiport --dports 135,139,445 -j DROP
$IPTABLES -A INPUT -p udp -m udp --dport 1900 -j DROP

# accept SSH (22/tcp) input from administrator IP
if [ "$ADMIN_IP" != "" ]; then
   $IPTABLES -A INPUT -p tcp -s $ADMIN_IP --dport 22 -j ACCEPT
fi

# accept SSH (22/tcp) input from remote administrator IP
if [ "$RMT_ADMIN_IP" != "" ]; then
   $IPTABLES -A INPUT -p tcp -s $RMT_ADMIN_IP --dport 22 -j ACCEPT
fi

# Accept icmp-type 3/4 and 11
$IPTABLES -A INPUT -p icmp -m icmp --icmp-type 3/4 -j ACCEPT
$IPTABLES -A INPUT -p icmp -m icmp --icmp-type 11 -j ACCEPT

# accept ICMP input packets from INT only
# $IPTABLES -A INPUT -p icmp -s $INT_NET -i $INT_IFACE -j $TARGET

# accept ICMP Ping Requests
# $IPTABLES -A INPUT -p icmp --icmp-type echo-request -j $TARGET

# accept UNIX Traceroute Requests
# $IPTABLES -A INPUT -p udp --dport 33434 -j $TARGET

# accept ICMP Timestamping Requests
# $IPTABLES -A INPUT -p icmp --icmp-type timestamp-request -j $TARGET

# accept ICMP Address Masking
# $IPTABLES -A INPUT -p icmp --icmp-type address-mask-request -j $TARGET

# accept ICMP Source Quench Requests
# $IPTABLES -A INPUT -p icmp --icmp-type source-quench -j $TARGET

# Proxy access - authorization
if [ "$PROXY_PORT" != "" -a "$INT_IFACE" != "" ]; then
   $IPTABLES -A INPUT -p tcp --dport $PROXY_PORT -i $INT_IFACE -j $TARGET
fi

# accept OpenVPN between this firewall and another
if [ "$OpenVPN_IP" != "" -a "$OpenVPN_PORT" != "" -a "$OpenVPN_PROTO" != "" ]; then
   $IPTABLES -A INPUT -p $OpenVPN_PROTO --dport $OpenVPN_PORT -s $OpenVPN_IP -j $TARGET
fi

# accept VPN between this firewall and another (using PPTP)
if [ "$PPTP_IP" != "" ]; then
   $IPTABLES -A INPUT -p 47  -s $PPTP_IP -j $TARGET
   $IPTABLES -A INPUT -p tcp -s $PPTP_IP --dport 1723 -j $TARGET
fi

# reject all the unmatched packets
$IPTABLES -A INPUT -m limit --limit 1/m --limit-burst 5 -j LOG --log-prefix "tuxfrw: INPUT! "